一、前期準備
寫這篇博文的目的是展示ottertune自帶的測試數據，以便了解數據構成。前期需要準備的條件：部署好環境，啓動服務。具體步驟參見我的另一篇文章：https://blog.csdn.net/weixin_40449300/article/details/87904128
本文承接我的前一篇文章的第三章第2.1節
二、 數據格式
1、workload-0數據生成目錄如下，接下來我會把樣例sample-0內容貼出：
2、sample-0__knobs.json
{
"local": null,
"global": {
"global": {
"log_rotation_size": "10MB", //單個日誌文件大小
"log_min_error_statement": "error",
"from_collapse_limit": "8",
"vacuum_cost_page_hit": "1",
"log_directory": "log",
"cpu_tuple_cost": "0.01",
"extra_float_digits": "3",
"geqo_effort": "5",
"block_size": "8192",
"segment_size": "1GB",
"hot_standby": "on",
"vacuum_cost_page_dirty": "20",
"temp_buffers": "8MB",
"bonjour": "off",
"autovacuum_vacuum_scale_factor": "0.2",
"geqo_threshold": "12",
"default_with_oids": "off",
"lc_monetary": "en_US.UTF-8",
"max_standby_streaming_delay": "30s",
"default_transaction_deferrable": "off",
"unix_socket_permissions": "0777",
"autovacuum": "on",
"track_commit_timestamp": "off",
"data_directory": "/Users/MacadamiaKitten/Desktop/psql_db",
"hot_standby_feedback": "off",
"synchronize_seqscans": "on",
"client_min_messages": "notice",
"enable_bitmapscan": "on",
"vacuum_multixact_freeze_min_age": "5000000",
"seq_page_cost": "1",
"stats_temp_directory": "pg_stat_tmp",
"log_min_duration_statement": "-1",
"wal_segment_size": "16MB",
"min_parallel_index_scan_size": "512kB",
"row_security": "on",
"checkpoint_timeout": "5min",
"enable_gathermerge": "on",
"force_parallel_mode": "off",
"geqo_generations": "0",
"log_planner_stats": "off",
"max_identifier_length": "63",
"log_replication_commands": "off",
"max_parallel_workers": "8",
"shared_preload_libraries": "",
"enable_hashagg": "on",
"effective_io_concurrency": "6",
"default_transaction_read_only": "off",
"replacement_sort_tuples": "150000",
"ssl_ecdh_curve": "prime256v1",
"krb_server_keyfile": "FILE:/usr/local/etc/postgresql/krb5.keytab",
"xmlbinary": "base64",
"autovacuum_analyze_threshold": "50",
"dynamic_library_path": "$libdir",
"transaction_isolation": "read committed",
"local_preload_libraries": "",
"unix_socket_directories": "/tmp",
"tcp_keepalives_idle": "7200",
"debug_print_parse": "off",
"statement_timeout": "0",
"vacuum_cost_limit": "200",
"max_replication_slots": "10",
"track_activities": "on",
"max_pred_locks_per_relation": "-2",
"parallel_setup_cost": "1000",
"max_logical_replication_workers": "4",
"autovacuum_vacuum_cost_delay": "20ms",
"idle_in_transaction_session_timeout": "0",
"application_name": "",
"enable_sort": "on",
"wal_writer_delay": "200ms",
"transaction_read_only": "off",
"autovacuum_freeze_max_age": "200000000",
"lock_timeout": "0",
"vacuum_freeze_table_age": "150000000",
"synchronous_commit": "on",
"trace_recovery_messages": "log",
"vacuum_cost_page_miss": "10",
"tcp_keepalives_count": "8",
"max_parallel_workers_per_gather": "2",
"listen_addresses": "localhost",
"server_version": "10.1",
"integer_datetimes": "on",
"lc_messages": "en_US.UTF-8",
"log_statement_stats": "off",
"syslog_ident": "postgres",
"data_checksums": "off",
"allow_system_table_mods": "off",
"geqo": "on",
"default_statistics_target": "100",
"hba_file": "/Users/MacadamiaKitten/Desktop/psql_db/pg_hba.conf",
"lc_collate": "en_US.UTF-8",
"lc_numeric": "en_US.UTF-8",
"debug_assertions": "off",
"TimeZone": "America/New_York",
"checkpoint_completion_target": "0.5",
"enable_mergejoin": "on",
"superuser_reserved_connections": "3",
"autovacuum_max_workers": "3",
"wal_consistency_checking": "",
"trace_notify": "off",
"log_truncate_on_rotation": "off",
"backslash_quote": "safe_encoding",
"check_function_bodies": "on",
"timezone_abbreviations": "Default",
"debug_pretty_print": "on",
"logging_collector": "off",
"maintenance_work_mem": "64MB",
"max_locks_per_transaction": "64",
"enable_indexonlyscan": "on",
"trace_sort": "off",
"syslog_facility": "local0",
"config_file": "/Users/MacadamiaKitten/Desktop/psql_db/postgresql.conf",
"archive_timeout": "0",
"random_page_cost": "4",
"vacuum_defer_cleanup_age": "0",
"escape_string_warning": "on",
"session_replication_role": "origin",
"min_parallel_table_scan_size": "8MB",
"max_files_per_process": "1000",
"commit_siblings": "5",
"track_io_timing": "off",
"max_pred_locks_per_page": "2",
"max_function_args": "100",
"log_temp_files": "-1",
"default_text_search_config": "pg_catalog.english",
"synchronous_standby_names": "",
"parallel_tuple_cost": "0.1",
"log_line_prefix": "%m [%p] ",
"max_connections": "100",
"autovacuum_multixact_freeze_max_age": "400000000",
"wal_level": "replica",
"bytea_output": "hex",
"max_wal_senders": "10",
"cursor_tuple_fraction": "0.1",
"checkpoint_warning": "30s",
"server_encoding": "UTF8",
"join_collapse_limit": "8",
"pre_auth_delay": "0",
"max_index_keys": "32",
"password_encryption": "md5",
"ssl": "off",
"huge_pages": "try",
"log_min_messages": "warning",
"enable_material": "on",
"bgwriter_lru_multiplier": "2",
"ssl_dh_params_file": "",
"external_pid_file": "",
"transform_null_equals": "off",
"wal_receiver_timeout": "1min",
"backend_flush_after": "0",
"lc_time": "en_US.UTF-8",
"cpu_index_tuple_cost": "0.005",
"max_pred_locks_per_transaction": "64",
"log_duration": "off",
"track_activity_query_size": "1024",
"effective_cache_size": "4GB",
"ssl_cert_file": "server.crt",
"autovacuum_vacuum_threshold": "50",
"log_hostname": "off",
"authentication_timeout": "1min",
"array_nulls": "on",
"log_autovacuum_min_duration": "-1",
"ignore_checksum_failure": "off",
"syslog_split_messages": "on",
"wal_log_hints": "off",
"max_stack_depth": "2MB",
"deadlock_timeout": "1s",
"max_standby_archive_delay": "30s",
"syslog_sequence_numbers": "on",
"wal_sync_method": "open_datasync",
"ident_file": "/Users/MacadamiaKitten/Desktop/psql_db/pg_ident.conf",
"wal_retrieve_retry_interval": "5s",
"transaction_deferrable": "off",
"full_page_writes": "on",
"work_mem": "2GB",
"cpu_operator_cost": "0.0025",
"wal_receiver_status_interval": "10s",
"track_functions": "none",
"default_tablespace": "",
"log_connections": "off",
"ignore_system_indexes": "off",
"IntervalStyle": "postgres",
"exit_on_error": "off",
"temp_tablespaces": "",
"log_parser_stats": "off",
"log_error_verbosity": "default",
"shared_buffers": "2GB",
"commit_delay": "0",
"enable_hashjoin": "on",
"vacuum_cost_delay": "0",
"autovacuum_work_mem": "-1",
"search_path": "\"$user\", public",
"ssl_crl_file": "",
"gin_fuzzy_search_limit": "0",
"track_counts": "on",
"quote_all_identifiers": "off",
"restart_after_crash": "on",
"log_disconnections": "off",
"vacuum_freeze_min_age": "50000000",
"wal_compression": "off",
"debug_print_rewritten": "off",
"wal_block_size": "8192",
"wal_keep_segments": "0",
"ssl_prefer_server_ciphers": "on",
"constraint_exclusion": "partition",
"log_timezone": "US/Eastern",
"bgwriter_delay": "200ms",
"session_preload_libraries": "",
"bgwriter_flush_after": "0",
"enable_tidscan": "on",
"log_filename": "postgresql-%Y-%m-%d_%H%M%S.log",
"zero_damaged_pages": "off",
"log_rotation_age": "1d",
"cluster_name": "",
"log_destination": "stderr",
"fsync": "on",
"checkpoint_timing": "7min",
"max_prepared_transactions": "0",
"unix_socket_group": "",
"debug_print_plan": "off",
"ssl_ciphers": "HIGH:MEDIUM:+3DES:!aNULL",
"client_encoding": "UTF8",
"lo_compat_privileges": "off",
"autovacuum_naptime": "1min",
"standard_conforming_strings": "on",
"max_worker_processes": "8",
"archive_command": "(disabled)",
"log_file_mode": "0600",
"default_transaction_isolation": "read committed",
"enable_nestloop": "on",
"vacuum_multixact_freeze_table_age": "150000000",
"dynamic_shared_memory_type": "posix",
"krb_caseins_users": "off",
"log_checkpoints": "off",
"ssl_key_file": "server.key",
"wal_writer_flush_after": "1MB",
"port": "5432",
"update_process_title": "on",
"bonjour_name": "",
"enable_indexscan": "on",
"wal_buffers": "4MB",
"checkpoint_flush_after": "0",
"DateStyle": "ISO, MDY",
"min_wal_size": "80MB",
"geqo_seed": "0",
"enable_seqscan": "on",
"operator_precedence_warning": "off",
"event_source": "PostgreSQL",
"log_statement": "none",
"log_lock_waits": "off",
"autovacuum_analyze_scale_factor": "0.1",
"bgwriter_lru_maxpages": "100",
"xmloption": "content",
"ssl_ca_file": "",
"db_user_namespace": "off",
"max_wal_size": "1GB",
"geqo_selection_bias": "2",
"gin_pending_list_limit": "4MB",
"wal_sender_timeout": "1min",
"tcp_keepalives_interval": "75",
"autovacuum_vacuum_cost_limit": "-1",
"log_executor_stats": "off",
"lc_ctype": "en_US.UTF-8",
"server_version_num": "100001",
"temp_file_limit": "-1",
"max_sync_workers_per_subscription": "2",
"old_snapshot_threshold": "-1",
"archive_mode": "off",
"geqo_pool_size": "0",
"post_auth_delay": "0"
}
}
3、sample-0__metrics_end.json
{
"local": {
"indexes": {
"pg_stat_user_indexes": {
"stock": {
"relid": "16523",
"idx_tup_read": "647319",
"indexrelid": "16526",
"idx_tup_fetch": "644561",
"relname": "stock",
"idx_scan": "644561",
"schemaname": "public",
"indexrelname": "stock_pkey"
},
"oorder": {
"relid": "16528",
"idx_tup_read": "616371",
"indexrelid": "16565",
"idx_tup_fetch": "616371",
"relname": "oorder",
"idx_scan": "616371",
"schemaname": "public",
"indexrelname": "idx_order"
},
"new_order": {
"relid": "16518",
"idx_tup_read": "2200",
"indexrelid": "16521",
"idx_tup_fetch": "1480",
"relname": "new_order",
"idx_scan": "1481",
"schemaname": "public",
"indexrelname": "new_order_pkey"
},
"district": {
"relid": "16549",
"idx_tup_read": "122234",
"indexrelid": "16552",
"idx_tup_fetch": "122234",
"relname": "district",
"idx_scan": "122234",
"schemaname": "public",
"indexrelname": "district_pkey"
},
"warehouse": {
"relid": "16559",
"idx_tup_read": "202634",
"indexrelid": "16562",
"idx_tup_fetch": "201331",
"relname": "warehouse",
"idx_scan": "202634",
"schemaname": "public",
"indexrelname": "warehouse_pkey"
},
"item": {
"relid": "16554",
"idx_tup_read": "209009",
"indexrelid": "16557",
"idx_tup_fetch": "209009",
"relname": "item",
"idx_scan": "209020",
"schemaname": "public",
"indexrelname": "item_pkey"
},
"order_line": {
"relid": "16513",
"idx_tup_read": "35698",
"indexrelid": "16516",
"idx_tup_fetch": "33762",
"relname": "order_line",
"idx_scan": "1655",
"schemaname": "public",
"indexrelname": "order_line_pkey"
},
"customer": {
"relid": "16540",
"idx_tup_read": "85256841",
"indexrelid": "16564",
"idx_tup_fetch": "85256809",
"relname": "customer",
"idx_scan": "82442",
"schemaname": "public",
"indexrelname": "idx_customer_name"
}
},
"pg_statio_user_indexes": {
"stock": {
"relid": "16523",
"idx_blks_read": "1530",
"relname": "stock",
"schemaname": "public",
"indexrelid": "16526",
"idx_blks_hit": 99547,
"indexrelname": "stock_pkey"
},
"oorder": {
"relid": "16528",
"idx_blks_read": "733",
"relname": "oorder",
"schemaname": "public",
"indexrelid": "16565",
"idx_blks_hit": 87809,
"indexrelname": "idx_order"
},
"new_order": {
"relid": "16518",
"idx_blks_read": "134",
"relname": "new_order",
"schemaname": "public",
"indexrelid": "16521",
"idx_blks_hit": 93896,
"indexrelname": "new_order_pkey"
},
"district": {
"relid": "16549",
"idx_blks_read": "5",
"relname": "district",
"schemaname": "public",
"indexrelid": "16552",
"idx_blks_hit": 71991,
"indexrelname": "district_pkey"
},
"warehouse": {
"relid": "16559",
"idx_blks_read": "6",
"relname": "warehouse",
"schemaname": "public",
"indexrelid": "16562",
"idx_blks_hit": 78013,
"indexrelname": "warehouse_pkey"
},
"item": {
"relid": "16554",
"idx_blks_read": "877",
"relname": "item",
"schemaname": "public",
"indexrelid": "16557",
"idx_blks_hit": 82396,
"indexrelname": "item_pkey"
},
"order_line": {
"relid": "16513",
"idx_blks_read": "3708",
"relname": "order_line",
"schemaname": "public",
"indexrelid": "16516",
"idx_blks_hit": 89428,
"indexrelname": "order_line_pkey"
},
"customer": {
"relid": "16540",
"idx_blks_read": "1589",
"relname": "customer",
"schemaname": "public",
"indexrelid": "16564",
"idx_blks_hit": 79969,
"indexrelname": "idx_customer_name"
}
}
},
"database": {
"pg_stat_database_conflicts": {
"template1": {
"confl_lock": "0",
"confl_bufferpin": "0",
"datname": "template1",
"datid": "1",
"confl_snapshot": "0",
"confl_deadlock": "0",
"confl_tablespace": "0"
},
"template0": {
"confl_lock": "0",
"confl_bufferpin": "0",
"datname": "template0",
"datid": "12557",
"confl_snapshot": "0",
"confl_deadlock": "0",
"confl_tablespace": "0"
},
"tpcc": {
"confl_lock": "0",
"confl_bufferpin": "0",
"datname": "tpcc",
"datid": "16384",
"confl_snapshot": "0",
"confl_deadlock": "0",
"confl_tablespace": "0"
},
"postgres": {
"confl_lock": "0",
"confl_bufferpin": "0",
"datname": "postgres",
"datid": "12558",
"confl_snapshot": "0",
"confl_deadlock": "0",
"confl_tablespace": "0"
}
},
"pg_stat_database": {
"template1": {
"blk_read_time": "0",
"tup_fetched": "0",
"tup_inserted": "0",
"blks_read": "0",
"datid": "1",
"numbackends": "0",
"blk_write_time": "0",
"temp_bytes": "0",
"temp_files": "0",
"tup_updated": "0",
"deadlocks": "0",
"xact_rollback": "0",
"datname": "template1",
"tup_deleted": "0",
"tup_returned": "0",
"blks_hit": "0",
"conflicts": "0",
"xact_commit": 75435
},
"template0": {
"blk_read_time": "0",
"tup_fetched": "0",
"tup_inserted": "0",
"blks_read": "0",
"datid": "12557",
"numbackends": "0",
"blk_write_time": "0",
"temp_bytes": "0",
"temp_files": "0",
"tup_updated": "0",
"deadlocks": "0",
"xact_rollback": "0",
"datname": "template0",
"tup_deleted": "0",
"tup_returned": "0",
"blks_hit": "0",
"conflicts": "0",
"xact_commit": 89461
},
"tpcc": {
"blk_read_time": "0",
"tup_fetched": "0",
"tup_inserted": "0",
"blks_read": "0",
"datid": "16384",
"numbackends": "0",
"blk_write_time": "0",
"temp_bytes": "0",
"temp_files": "0",
"tup_updated": "0",
"deadlocks": "0",
"xact_rollback": "0",
"datname": "tpcc",
"tup_deleted": "0",
"tup_returned": "0",
"blks_hit": "0",
"conflicts": "0",
"xact_commit": 79947
},
"postgres": {
"blk_read_time": "0",
"stats_reset": "2017-11-10 11:14:57.116228-05",
"tup_fetched": "103355344",
"tup_inserted": "2210752",
"blks_read": "104188",
"datid": "12558",
"numbackends": "1",
"blk_write_time": "0",
"temp_bytes": "0",
"temp_files": "0",
"tup_updated": "32675",
"deadlocks": "0",
"xact_rollback": "17",
"datname": "postgres",
"tup_deleted": "1818",
"tup_returned": "110741743",
"blks_hit": "115229324",
"conflicts": "0",
"xact_commit": 90840
}
}
},
"table": {
"pg_stat_user_tables": {
"history": {
"n_tup_del": "0",
"autovacuum_count": "0",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "history",
"n_tup_hot_upd": "0",
"n_tup_ins": 79116,
"seq_scan": "2",
"last_autoanalyze": "2017-11-20 15:59:02.567618-05",
"n_tup_upd": "0",
"n_mod_since_analyze": "854",
"n_dead_tup": "0",
"seq_tup_read": "0",
"relid": "16536",
"schemaname": "public",
"n_live_tup": "60854"
},
"order_line": {
"n_tup_del": "0",
"n_dead_tup": "2550",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "order_line",
"idx_scan": "1655",
"last_autoanalyze": "2017-11-20 16:00:11.017507-05",
"seq_scan": "3",
"n_mod_since_analyze": "16230",
"n_tup_upd": "7329",
"n_tup_ins": 93248,
"idx_tup_fetch": "33762",
"n_tup_hot_upd": "5393",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16513",
"schemaname": "public",
"n_live_tup": "608373"
},
"oorder": {
"n_tup_del": "0",
"n_dead_tup": "117",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "oorder",
"idx_scan": "627652",
"last_autoanalyze": "2017-11-20 15:59:54.690984-05",
"seq_scan": "4",
"n_mod_since_analyze": "1629",
"n_tup_upd": "740",
"n_tup_ins": 74076,
"idx_tup_fetch": "627652",
"n_tup_hot_upd": "662",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16528",
"schemaname": "public",
"n_live_tup": "60889"
},
"new_order": {
"n_tup_del": "740",
"n_dead_tup": "751",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "new_order",
"idx_scan": "1481",
"last_autoanalyze": "2017-11-20 16:00:11.217111-05",
"seq_scan": "1",
"n_mod_since_analyze": "1629",
"n_tup_upd": "0",
"n_tup_ins": 82220,
"idx_tup_fetch": "1480",
"n_tup_hot_upd": "0",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16518",
"schemaname": "public",
"n_live_tup": "16964"
},
"district": {
"n_tup_del": "0",
"n_dead_tup": "33",
"analyze_count": "0",
"autoanalyze_count": "2",
"vacuum_count": "0",
"relname": "district",
"idx_scan": "122234",
"last_autoanalyze": "2017-11-20 19:23:34.201509-05",
"seq_scan": "2221",
"n_mod_since_analyze": "0",
"n_tup_upd": "1754",
"n_tup_ins": 73048,
"idx_tup_fetch": "122234",
"n_tup_hot_upd": "1754",
"autovacuum_count": "0",
"seq_tup_read": "41522",
"relid": "16549",
"schemaname": "public",
"n_live_tup": "20"
},
"warehouse": {
"n_tup_del": "0",
"n_dead_tup": "0",
"analyze_count": "0",
"autoanalyze_count": "2",
"vacuum_count": "0",
"relname": "warehouse",
"idx_scan": "202634",
"last_autoanalyze": "2017-11-20 19:23:34.236294-05",
"seq_scan": "1",
"n_mod_since_analyze": "0",
"n_tup_upd": "854",
"n_tup_ins": 87189,
"idx_tup_fetch": "202634",
"n_tup_hot_upd": "854",
"autovacuum_count": "2",
"seq_tup_read": "0",
"relid": "16559",
"schemaname": "public",
"n_live_tup": "2",
"last_autovacuum": "2017-11-20 19:23:34.235793-05"
},
"item": {
"n_tup_del": "0",
"n_dead_tup": "0",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "item",
"idx_scan": "209020",
"last_autoanalyze": "2017-11-20 15:59:26.613728-05",
"seq_scan": "1",
"n_mod_since_analyze": "2000",
"n_tup_upd": "0",
"n_tup_ins": 84400,
"idx_tup_fetch": "209009",
"n_tup_hot_upd": "0",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16554",
"schemaname": "public",
"n_live_tup": "102000"
},
"stock": {
"n_tup_del": "0",
"n_dead_tup": "4364",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "stock",
"idx_scan": "644561",
"last_autoanalyze": "2017-11-20 15:59:01.368483-05",
"seq_scan": "3",
"n_mod_since_analyze": "8901",
"n_tup_upd": "8901",
"n_tup_ins": 85479,
"idx_tup_fetch": "644561",
"n_tup_hot_upd": "5305",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16523",
"schemaname": "public",
"n_live_tup": "200000"
},
"customer": {
"n_tup_del": "0",
"n_dead_tup": "1510",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "customer",
"idx_scan": "125261",
"last_autoanalyze": "2017-11-20 15:59:18.824212-05",
"seq_scan": "3",
"n_mod_since_analyze": "1594",
"n_tup_upd": "1594",
"n_tup_ins": 92192,
"idx_tup_fetch": "85299628",
"n_tup_hot_upd": "262",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16540",
"schemaname": "public",
"n_live_tup": "60000"
}
},
"pg_statio_user_tables": {
"history": {
"relname": "history",
"relid": "16536",
"heap_blks_hit": "184380",
"heap_blks_read": "746",
"schemaname": "public"
},
"stock": {
"relid": "16523",
"heap_blks_read": "11757",
"idx_blks_read": "1530",
"idx_blks_hit": "2447522",
"relname": "stock",
"heap_blks_hit": "1920817",
"schemaname": "public"
},
"oorder": {
"relid": "16528",
"heap_blks_read": "928",
"idx_blks_read": "1881",
"idx_blks_hit": "3979052",
"relname": "oorder",
"heap_blks_hit": "1378399",
"schemaname": "public"
},
"new_order": {
"relid": "16518",
"heap_blks_read": "192",
"idx_blks_read": "134",
"idx_blks_hit": "38225",
"relname": "new_order",
"heap_blks_hit": "37856",
"schemaname": "public"
},
"district": {
"relid": "16549",
"heap_blks_read": "3",
"idx_blks_read": "5",
"idx_blks_hit": "122259",
"relname": "district",
"heap_blks_hit": "249754",
"schemaname": "public"
},
"warehouse": {
"relid": "16559",
"heap_blks_read": "80",
"idx_blks_read": "6",
"idx_blks_hit": "202643",
"relname": "warehouse",
"heap_blks_hit": "404486",
"schemaname": "public"
},
"item": {
"relid": "16554",
"heap_blks_read": "4542",
"idx_blks_read": "877",
"idx_blks_hit": "617914",
"relname": "item",
"heap_blks_hit": "509702",
"schemaname": "public"
},
"order_line": {
"relid": "16513",
"heap_blks_read": "12419",
"idx_blks_read": "3708",
"idx_blks_hit": "1788651",
"relname": "order_line",
"heap_blks_hit": "1869417",
"schemaname": "public"
},
"customer": {
"relname": "customer",
"tidx_blks_read": "0",
"relid": "16540",
"heap_blks_read": "13826",
"idx_blks_read": "2716",
"tidx_blks_hit": "0",
"toast_blks_hit": "0",
"toast_blks_read": "0",
"heap_blks_hit": "70136669",
"schemaname": "public",
"idx_blks_hit": "1411491"
}
}
}
},
"global": {
"pg_stat_bgwriter": {
"checkpoint_sync_time": "19",
"buffers_clean": "49590",
"stats_reset": "2017-11-10 10:59:47.397075-05",
"checkpoints_timed": "1277",
"buffers_checkpoint": "33250",
"buffers_backend_fsync": "0",
"buffers_backend": "81032",
"maxwritten_clean": "325",
"checkpoints_req": "2",
"buffers_alloc": 9066,
"checkpoint_write_time": "597851"
},
"pg_stat_archiver": {
"archived_count": "0",
"stats_reset": "2017-11-10 10:59:47.397075-05",
"failed_count": "0"
}
}
4、sample-0__metrics_start.json
{
"local": {
"indexes": {
"pg_stat_user_indexes": {
"stock": {
"relid": "16523",
"idx_tup_read": "647319",
"indexrelid": "16526",
"idx_tup_fetch": "644561",
"relname": "stock",
"idx_scan": "644561",
"schemaname": "public",
"indexrelname": "stock_pkey"
},
"oorder": {
"relid": "16528",
"idx_tup_read": "616371",
"indexrelid": "16565",
"idx_tup_fetch": "616371",
"relname": "oorder",
"idx_scan": "616371",
"schemaname": "public",
"indexrelname": "idx_order"
},
"new_order": {
"relid": "16518",
"idx_tup_read": "2200",
"indexrelid": "16521",
"idx_tup_fetch": "1480",
"relname": "new_order",
"idx_scan": "1481",
"schemaname": "public",
"indexrelname": "new_order_pkey"
},
"district": {
"relid": "16549",
"idx_tup_read": "122234",
"indexrelid": "16552",
"idx_tup_fetch": "122234",
"relname": "district",
"idx_scan": "122234",
"schemaname": "public",
"indexrelname": "district_pkey"
},
"warehouse": {
"relid": "16559",
"idx_tup_read": "202634",
"indexrelid": "16562",
"idx_tup_fetch": "201331",
"relname": "warehouse",
"idx_scan": "202634",
"schemaname": "public",
"indexrelname": "warehouse_pkey"
},
"item": {
"relid": "16554",
"idx_tup_read": "209009",
"indexrelid": "16557",
"idx_tup_fetch": "209009",
"relname": "item",
"idx_scan": "209020",
"schemaname": "public",
"indexrelname": "item_pkey"
},
"order_line": {
"relid": "16513",
"idx_tup_read": "35698",
"indexrelid": "16516",
"idx_tup_fetch": "33762",
"relname": "order_line",
"idx_scan": "1655",
"schemaname": "public",
"indexrelname": "order_line_pkey"
},
"customer": {
"relid": "16540",
"idx_tup_read": "85256841",
"indexrelid": "16564",
"idx_tup_fetch": "85256809",
"relname": "customer",
"idx_scan": "82442",
"schemaname": "public",
"indexrelname": "idx_customer_name"
}
},
"pg_statio_user_indexes": {
"stock": {
"relid": "16523",
"idx_blks_read": "1530",
"relname": "stock",
"schemaname": "public",
"indexrelid": "16526",
"idx_blks_hit": 50162,
"indexrelname": "stock_pkey"
},
"oorder": {
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"idx_blks_read": "733",
"relname": "oorder",
"schemaname": "public",
"indexrelid": "16565",
"idx_blks_hit": 33851,
"indexrelname": "idx_order"
},
"new_order": {
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"idx_blks_read": "134",
"relname": "new_order",
"schemaname": "public",
"indexrelid": "16521",
"idx_blks_hit": 65198,
"indexrelname": "new_order_pkey"
},
"district": {
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"idx_blks_read": "5",
"relname": "district",
"schemaname": "public",
"indexrelid": "16552",
"idx_blks_hit": 57248,
"indexrelname": "district_pkey"
},
"warehouse": {
"relid": "16559",
"idx_blks_read": "6",
"relname": "warehouse",
"schemaname": "public",
"indexrelid": "16562",
"idx_blks_hit": 33264,
"indexrelname": "warehouse_pkey"
},
"item": {
"relid": "16554",
"idx_blks_read": "877",
"relname": "item",
"schemaname": "public",
"indexrelid": "16557",
"idx_blks_hit": 32612,
"indexrelname": "item_pkey"
},
"order_line": {
"relid": "16513",
"idx_blks_read": "3708",
"relname": "order_line",
"schemaname": "public",
"indexrelid": "16516",
"idx_blks_hit": 69532,
"indexrelname": "order_line_pkey"
},
"customer": {
"relid": "16540",
"idx_blks_read": "1589",
"relname": "customer",
"schemaname": "public",
"indexrelid": "16564",
"idx_blks_hit": 50063,
"indexrelname": "idx_customer_name"
}
}
},
"database": {
"pg_stat_database_conflicts": {
"template1": {
"confl_lock": "0",
"confl_bufferpin": "0",
"datname": "template1",
"datid": "1",
"confl_snapshot": "0",
"confl_deadlock": "0",
"confl_tablespace": "0"
},
"template0": {
"confl_lock": "0",
"confl_bufferpin": "0",
"datname": "template0",
"datid": "12557",
"confl_snapshot": "0",
"confl_deadlock": "0",
"confl_tablespace": "0"
},
"tpcc": {
"confl_lock": "0",
"confl_bufferpin": "0",
"datname": "tpcc",
"datid": "16384",
"confl_snapshot": "0",
"confl_deadlock": "0",
"confl_tablespace": "0"
},
"postgres": {
"confl_lock": "0",
"confl_bufferpin": "0",
"datname": "postgres",
"datid": "12558",
"confl_snapshot": "0",
"confl_deadlock": "0",
"confl_tablespace": "0"
}
},
"pg_stat_database": {
"template1": {
"blk_read_time": "0",
"tup_fetched": "0",
"tup_inserted": "0",
"blks_read": "0",
"datid": "1",
"numbackends": "0",
"blk_write_time": "0",
"temp_bytes": "0",
"temp_files": "0",
"tup_updated": "0",
"deadlocks": "0",
"xact_rollback": "0",
"datname": "template1",
"tup_deleted": "0",
"tup_returned": "0",
"blks_hit": "0",
"conflicts": "0",
"xact_commit": 59094
},
"template0": {
"blk_read_time": "0",
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"tup_inserted": "0",
"blks_read": "0",
"datid": "12557",
"numbackends": "0",
"blk_write_time": "0",
"temp_bytes": "0",
"temp_files": "0",
"tup_updated": "0",
"deadlocks": "0",
"xact_rollback": "0",
"datname": "template0",
"tup_deleted": "0",
"tup_returned": "0",
"blks_hit": "0",
"conflicts": "0",
"xact_commit": 47444
},
"tpcc": {
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"blks_read": "0",
"datid": "16384",
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"blk_write_time": "0",
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"temp_files": "0",
"tup_updated": "0",
"deadlocks": "0",
"xact_rollback": "0",
"datname": "tpcc",
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"tup_returned": "0",
"blks_hit": "0",
"conflicts": "0",
"xact_commit": 56622
},
"postgres": {
"blk_read_time": "0",
"stats_reset": "2017-11-10 11:14:57.116228-05",
"tup_fetched": "103355344",
"tup_inserted": "2210752",
"blks_read": "104188",
"datid": "12558",
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"blk_write_time": "0",
"temp_bytes": "0",
"temp_files": "0",
"tup_updated": "32675",
"deadlocks": "0",
"xact_rollback": "17",
"datname": "postgres",
"tup_deleted": "1818",
"tup_returned": "110741743",
"blks_hit": "115229324",
"conflicts": "0",
"xact_commit": 61075
}
}
},
"table": {
"pg_stat_user_tables": {
"history": {
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"autovacuum_count": "0",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "history",
"n_tup_hot_upd": "0",
"n_tup_ins": 46199,
"seq_scan": "2",
"last_autoanalyze": "2017-11-20 15:59:02.567618-05",
"n_tup_upd": "0",
"n_mod_since_analyze": "854",
"n_dead_tup": "0",
"seq_tup_read": "0",
"relid": "16536",
"schemaname": "public",
"n_live_tup": "60854"
},
"order_line": {
"n_tup_del": "0",
"n_dead_tup": "2550",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "order_line",
"idx_scan": "1655",
"last_autoanalyze": "2017-11-20 16:00:11.017507-05",
"seq_scan": "3",
"n_mod_since_analyze": "16230",
"n_tup_upd": "7329",
"n_tup_ins": 66027,
"idx_tup_fetch": "33762",
"n_tup_hot_upd": "5393",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16513",
"schemaname": "public",
"n_live_tup": "608373"
},
"oorder": {
"n_tup_del": "0",
"n_dead_tup": "117",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "oorder",
"idx_scan": "627652",
"last_autoanalyze": "2017-11-20 15:59:54.690984-05",
"seq_scan": "4",
"n_mod_since_analyze": "1629",
"n_tup_upd": "740",
"n_tup_ins": 57728,
"idx_tup_fetch": "627652",
"n_tup_hot_upd": "662",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16528",
"schemaname": "public",
"n_live_tup": "60889"
},
"new_order": {
"n_tup_del": "740",
"n_dead_tup": "751",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "new_order",
"idx_scan": "1481",
"last_autoanalyze": "2017-11-20 16:00:11.217111-05",
"seq_scan": "1",
"n_mod_since_analyze": "1629",
"n_tup_upd": "0",
"n_tup_ins": 30194,
"idx_tup_fetch": "1480",
"n_tup_hot_upd": "0",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16518",
"schemaname": "public",
"n_live_tup": "16964"
},
"district": {
"n_tup_del": "0",
"n_dead_tup": "33",
"analyze_count": "0",
"autoanalyze_count": "2",
"vacuum_count": "0",
"relname": "district",
"idx_scan": "122234",
"last_autoanalyze": "2017-11-20 19:23:34.201509-05",
"seq_scan": "2221",
"n_mod_since_analyze": "0",
"n_tup_upd": "1754",
"n_tup_ins": 31863,
"idx_tup_fetch": "122234",
"n_tup_hot_upd": "1754",
"autovacuum_count": "0",
"seq_tup_read": "41522",
"relid": "16549",
"schemaname": "public",
"n_live_tup": "20"
},
"warehouse": {
"n_tup_del": "0",
"n_dead_tup": "0",
"analyze_count": "0",
"autoanalyze_count": "2",
"vacuum_count": "0",
"relname": "warehouse",
"idx_scan": "202634",
"last_autoanalyze": "2017-11-20 19:23:34.236294-05",
"seq_scan": "1",
"n_mod_since_analyze": "0",
"n_tup_upd": "854",
"n_tup_ins": 66688,
"idx_tup_fetch": "202634",
"n_tup_hot_upd": "854",
"autovacuum_count": "2",
"seq_tup_read": "0",
"relid": "16559",
"schemaname": "public",
"n_live_tup": "2",
"last_autovacuum": "2017-11-20 19:23:34.235793-05"
},
"item": {
"n_tup_del": "0",
"n_dead_tup": "0",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "item",
"idx_scan": "209020",
"last_autoanalyze": "2017-11-20 15:59:26.613728-05",
"seq_scan": "1",
"n_mod_since_analyze": "2000",
"n_tup_upd": "0",
"n_tup_ins": 55439,
"idx_tup_fetch": "209009",
"n_tup_hot_upd": "0",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16554",
"schemaname": "public",
"n_live_tup": "102000"
},
"stock": {
"n_tup_del": "0",
"n_dead_tup": "4364",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "stock",
"idx_scan": "644561",
"last_autoanalyze": "2017-11-20 15:59:01.368483-05",
"seq_scan": "3",
"n_mod_since_analyze": "8901",
"n_tup_upd": "8901",
"n_tup_ins": 36655,
"idx_tup_fetch": "644561",
"n_tup_hot_upd": "5305",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16523",
"schemaname": "public",
"n_live_tup": "200000"
},
"customer": {
"n_tup_del": "0",
"n_dead_tup": "1510",
"analyze_count": "0",
"autoanalyze_count": "1",
"vacuum_count": "0",
"relname": "customer",
"idx_scan": "125261",
"last_autoanalyze": "2017-11-20 15:59:18.824212-05",
"seq_scan": "3",
"n_mod_since_analyze": "1594",
"n_tup_upd": "1594",
"n_tup_ins": 63721,
"idx_tup_fetch": "85299628",
"n_tup_hot_upd": "262",
"autovacuum_count": "0",
"seq_tup_read": "0",
"relid": "16540",
"schemaname": "public",
"n_live_tup": "60000"
}
},
"pg_statio_user_tables": {
"history": {
"relname": "history",
"relid": "16536",
"heap_blks_hit": "184380",
"heap_blks_read": "746",
"schemaname": "public"
},
"stock": {
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"heap_blks_read": "11757",
"idx_blks_read": "1530",
"idx_blks_hit": "2447522",
"relname": "stock",
"heap_blks_hit": "1920817",
"schemaname": "public"
},
"oorder": {
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"heap_blks_read": "928",
"idx_blks_read": "1881",
"idx_blks_hit": "3979052",
"relname": "oorder",
"heap_blks_hit": "1378399",
"schemaname": "public"
},
"new_order": {
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"heap_blks_read": "192",
"idx_blks_read": "134",
"idx_blks_hit": "38225",
"relname": "new_order",
"heap_blks_hit": "37856",
"schemaname": "public"
},
"district": {
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"heap_blks_read": "3",
"idx_blks_read": "5",
"idx_blks_hit": "122259",
"relname": "district",
"heap_blks_hit": "249754",
"schemaname": "public"
},
"warehouse": {
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"heap_blks_read": "80",
"idx_blks_read": "6",
"idx_blks_hit": "202643",
"relname": "warehouse",
"heap_blks_hit": "404486",
"schemaname": "public"
},
"item": {
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"idx_blks_read": "877",
"idx_blks_hit": "617914",
"relname": "item",
"heap_blks_hit": "509702",
"schemaname": "public"
},
"order_line": {
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"heap_blks_read": "12419",
"idx_blks_read": "3708",
"idx_blks_hit": "1788651",
"relname": "order_line",
"heap_blks_hit": "1869417",
"schemaname": "public"
},
"customer": {
"relname": "customer",
"tidx_blks_read": "0",
"relid": "16540",
"heap_blks_read": "13826",
"idx_blks_read": "2716",
"tidx_blks_hit": "0",
"toast_blks_hit": "0",
"toast_blks_read": "0",
"heap_blks_hit": "70136669",
"schemaname": "public",
"idx_blks_hit": "1411491"
}
}
}
},
"global": {
"pg_stat_bgwriter": {
"checkpoint_sync_time": "19",
"buffers_clean": "49590",
"stats_reset": "2017-11-10 10:59:47.397075-05",
"checkpoints_timed": "1277",
"buffers_checkpoint": "33250",
"buffers_backend_fsync": "0",
"buffers_backend": "81032",
"maxwritten_clean": "325",
"checkpoints_req": "2",
"buffers_alloc": 3955,
"checkpoint_write_time": "597851"
},
"pg_stat_archiver": {
"archived_count": "0",
"stats_reset": "2017-11-10 10:59:47.397075-05",
"failed_count": "0"
}
}
5、sample-0__summary.json
{
"database_type": "postgres",
"end_time": 1551345695214,
"workload_name": "workload-0",
"observation_time": 300,
"start_time": 1551345395214,
"database_version": "9.6"
}
三、數據庫參數解析
1、postgresql參數
1）登錄數據庫：sudo -u postgres psql
2）顯示全部配置參數：show all;
| name | setting | description |
| allow_system_table_mods | off | Allows modifications of the structure of system tables. |
| application_name | psql | Sets the application name to be reported in statistics and logs. |
| archive_command | (disabled) | Sets the shell command that will be called to archive a WAL file. |
| archive_mode | off | Allows archiving of WAL files using archive_command. |
| archive_timeout | 0 | Forces a switch to the next xlog file if a new file has not been started within N seconds. |
| array_nulls | on | Enable input of NULL elements in arrays. |
| authentication_timeout | 1min | Sets the maximum allowed time to complete client authentication. |
| autovacuum | on | Starts the autovacuum subprocess. |
| autovacuum_analyze_scale_factor | 0.1 | Number of tuple inserts, updates, or deletes prior to analyze as a fraction of reltuples. |
| autovacuum_analyze_threshold | 50 | Minimum number of tuple inserts, updates, or deletes prior to analyze. |
| autovacuum_freeze_max_age | 200000000 | Age at which to autovacuum a table to prevent transaction ID wraparound. |
| autovacuum_max_workers | 3 | Sets the maximum number of simultaneously running autovacuum worker processes. |
| autovacuum_multixact_freeze_max_age | 400000000 | Multixact age at which to autovacuum a table to prevent multixact wraparound. |
| autovacuum_naptime | 1min | Time to sleep between autovacuum runs. |
| autovacuum_vacuum_cost_delay | 20ms | Vacuum cost delay in milliseconds, for autovacuum. |
| autovacuum_vacuum_cost_limit | -1 | Vacuum cost amount available before napping, for autovacuum. |
| autovacuum_vacuum_scale_factor | 0.2 | Number of tuple updates or deletes prior to vacuum as a fraction of reltuples. |
| autovacuum_vacuum_threshold | 50 | Minimum number of tuple updates or deletes prior to vacuum. |
| autovacuum_work_mem | -1 | Sets the maximum memory to be used by each autovacuum worker process. |
| backslash_quote | safe_encoding | Sets whether "\'" is allowed in string literals. |
| bgwriter_delay | 200ms | Background writer sleep time between rounds. |
| bgwriter_lru_maxpages | 100 | Background writer maximum number of LRU pages to flush per round. |
| bgwriter_lru_multiplier | 2 | Multiple of the average buffer usage to free per round. |
| block_size | 8192 | Shows the size of a disk block. |
| bonjour | off | Enables advertising the server via Bonjour. |
| bonjour_name | Sets the Bonjour service name. | |
| bytea_output | hex | Sets the output format for bytea. |
| check_function_bodies | on | Check function bodies during CREATE FUNCTION. |
| checkpoint_completion_target | 0.5 | Time spent flushing dirty buffers during checkpoint, as fraction of checkpoint interval. |
| checkpoint_timeout | 5min | Sets the maximum time between automatic WAL checkpoints. |
| checkpoint_warning | 30s | Enables warnings if checkpoint segments are filled more frequently than this. |
| client_encoding | UTF8 | Sets the client's character set encoding. |
| client_min_messages | notice | Sets the message levels that are sent to the client. |
| cluster_name | Sets the name of the cluster, which is included in the process title. | |
| commit_delay | 0 | Sets the delay in microseconds between transaction commit and flushing WAL to disk. |
| commit_siblings | 5 | Sets the minimum concurrent open transactions before performing commit_delay. |
| config_file | /etc/postgresql/9.5/main/postgresql.conf | Sets the server's main configuration file. |
| constraint_exclusion | partition | Enables the planner to use constraints to optimize queries. |
| cpu_index_tuple_cost | 0.005 | Sets the planner's estimate of the cost of processing each index entry during an index scan. |
| cpu_operator_cost | 0.0025 | Sets the planner's estimate of the cost of processing each operator or function call. |
| cpu_tuple_cost | 0.01 | Sets the planner's estimate of the cost of processing each tuple (row). |
| cursor_tuple_fraction | 0.1 | Sets the planner's estimate of the fraction of a cursor's rows that will be retrieved. |
| data_checksums | off | Shows whether data checksums are turned on for this cluster. |
| data_directory | /var/lib/postgresql/9.5/main | Sets the server's data directory. |
| DateStyle | ISO, MDY | Sets the display format for date and time values. |
| db_user_namespace | off | Enables per-database user names. |
| deadlock_timeout | 1s | Sets the time to wait on a lock before checking for deadlock. |
| debug_assertions | off | Shows whether the running server has assertion checks enabled. |
| debug_pretty_print | on | Indents parse and plan tree displays. |
| debug_print_parse | off | Logs each query's parse tree. |
| debug_print_plan | off | Logs each query's execution plan. |
| debug_print_rewritten | off | Logs each query's rewritten parse tree. |
| default_statistics_target | 100 | Sets the default statistics target. |
| default_tablespace | Sets the default tablespace to create tables and indexes in. | |
| default_text_search_config | pg_catalog.english | Sets default text search configuration. |
| default_transaction_deferrable | off | Sets the default deferrable status of new transactions. |
| default_transaction_isolation | read committed | Sets the transaction isolation level of each new transaction. |
| default_transaction_read_only | off | Sets the default read-only status of new transactions. |
| default_with_oids | off | Create new tables with OIDs by default. |
| dynamic_library_path | $libdir | Sets the path for dynamically loadable modules. |
| dynamic_shared_memory_type | posix | Selects the dynamic shared memory implementation used. |
| effective_cache_size | 4GB | Sets the planner's assumption about the size of the disk cache. |
| effective_io_concurrency | 1 | Number of simultaneous requests that can be handled efficiently by the disk subsystem. |
| enable_bitmapscan | on | Enables the planner's use of bitmap-scan plans. |
| enable_hashagg | on | Enables the planner's use of hashed aggregation plans. |
| enable_hashjoin | on | Enables the planner's use of hash join plans. |
| enable_indexonlyscan | on | Enables the planner's use of index-only-scan plans. |
| enable_indexscan | on | Enables the planner's use of index-scan plans. |
| enable_material | on | Enables the planner's use of materialization. |
| enable_mergejoin | on | Enables the planner's use of merge join plans. |
| enable_nestloop | on | Enables the planner's use of nested-loop join plans. |
| enable_seqscan | on | Enables the planner's use of sequential-scan plans. |
| enable_sort | on | Enables the planner's use of explicit sort steps. |
| enable_tidscan | on | Enables the planner's use of TID scan plans. |
| escape_string_warning | on | Warn about backslash escapes in ordinary string literals. |
| event_source | PostgreSQL | Sets the application name used to identify PostgreSQL messages in the event log. |
| exit_on_error | off | Terminate session on any error. |
| external_pid_file | /var/run/postgresql/9.5-main.pid | Writes the postmaster PID to the specified file. |
| extra_float_digits | 0 | Sets the number of digits displayed for floating-point values. |
| from_collapse_limit | 8 | Sets the FROM-list size beyond which subqueries are not collapsed. |
| fsync | on | Forces synchronization of updates to disk. |
| full_page_writes | on | Writes full pages to WAL when first modified after a checkpoint. |
| geqo | on | Enables genetic query optimization. |
| geqo_effort | 5 | GEQO: effort is used to set the default for other GEQO parameters. |
| geqo_generations | 0 | GEQO: number of iterations of the algorithm. |
| geqo_pool_size | 0 | GEQO: number of individuals in the population. |
| geqo_seed | 0 | GEQO: seed for random path selection. |
| geqo_selection_bias | 2 | GEQO: selective pressure within the population. |
| geqo_threshold | 12 | Sets the threshold of FROM items beyond which GEQO is used. |
| gin_fuzzy_search_limit | 0 | Sets the maximum allowed result for exact search by GIN. |
| gin_pending_list_limit | 4MB | Sets the maximum size of the pending list for GIN index. |
| hba_file | /etc/postgresql/9.5/main/pg_hba.conf | Sets the server's "hba" configuration file. |
| hot_standby | off | Allows connections and queries during recovery. |
| hot_standby_feedback | off | Allows feedback from a hot standby to the primary that will avoid query conflicts. |
| huge_pages | try | Use of huge pages on Linux. |
| ident_file | /etc/postgresql/9.5/main/pg_ident.conf | Sets the server's "ident" configuration file. |
| ignore_checksum_failure | off | Continues processing after a checksum failure. |
| ignore_system_indexes | off | Disables reading from system indexes. |
| integer_datetimes | on | Datetimes are integer based. |
| IntervalStyle | postgres | Sets the display format for interval values. |
| join_collapse_limit | 8 | Sets the FROM-list size beyond which JOIN constructs are not flattened. |
| krb_caseins_users | off | Sets whether Kerberos and GSSAPI user names should be treated as case-insensitive. |
| krb_server_keyfile | FILE:/etc/postgresql-common/krb5.keytab | Sets the location of the Kerberos server key file. |
| lc_collate | en_US.UTF-8 | Shows the collation order locale. |
| lc_ctype | en_US.UTF-8 | Shows the character classification and case conversion locale. |
| lc_messages | en_US.UTF-8 | Sets the language in which messages are displayed. |
| lc_monetary | en_US.UTF-8 | Sets the locale for formatting monetary amounts. |
| lc_numeric | en_US.UTF-8 | Sets the locale for formatting numbers. |
| lc_time | en_US.UTF-8 | Sets the locale for formatting date and time values. |
| listen_addresses | localhost | Sets the host name or IP address(es) to listen to. |
| lo_compat_privileges | off | Enables backward compatibility mode for privilege checks on large objects. |
| local_preload_libraries | Lists unprivileged shared libraries to preload into each backend. | |
| lock_timeout | 0 | Sets the maximum allowed duration of any wait for a lock. |
| log_autovacuum_min_duration | -1 | Sets the minimum execution time above which autovacuum actions will be logged. |
| log_checkpoints | off | Logs each checkpoint. |
| log_connections | off | Logs each successful connection. |
| log_destination | stderr | Sets the destination for server log output. |
| log_directory | pg_log | Sets the destination directory for log files. |
| log_disconnections | off | Logs end of a session, including duration. |
| log_duration | off | Logs the duration of each completed SQL statement. |
| log_error_verbosity | default | Sets the verbosity of logged messages. |
| log_executor_stats | off | Writes executor performance statistics to the server log. |
| log_file_mode | 0600 | Sets the file permissions for log files. |
| log_filename | postgresql-%Y-%m-%d_%H%M%S.log | Sets the file name pattern for log files. |
| log_hostname | off | Logs the host name in the connection logs. |
| log_line_prefix | %t [%p-%l] %q%u@%d | Controls information prefixed to each log line. |
| log_lock_waits | off | Logs long lock waits. |
| log_min_duration_statement | -1 | Sets the minimum execution time above which statements will be logged. |
| log_min_error_statement | error | Causes all statements generating error at or above this level to be logged. |
| log_min_messages | warning | Sets the message levels that are logged. |
| log_parser_stats | off | Writes parser performance statistics to the server log. |
| log_planner_stats | off | Writes planner performance statistics to the server log. |
| log_replication_commands | off | Logs each replication command. |
| log_rotation_age | 1d | Automatic log file rotation will occur after N minutes. |
| log_rotation_size | 10MB | Automatic log file rotation will occur after N kilobytes. |
| log_statement | none | Sets the type of statements logged. |
| log_statement_stats | off | Writes cumulative performance statistics to the server log. |
| log_temp_files | -1 | Log the use of temporary files larger than this number of kilobytes. |
| log_timezone | PRC | Sets the time zone to use in log messages. |
| log_truncate_on_rotation | off | Truncate existing log files of same name during log rotation. |
| logging_collector | off | Start a subprocess to capture stderr output and/or csvlogs into log files. |
| maintenance_work_mem | 64MB | Sets the maximum memory to be used for maintenance operations. |
| max_connections | 100 | Sets the maximum number of concurrent connections. |
| max_files_per_process | 1000 | Sets the maximum number of simultaneously open files for each server process. |
| max_function_args | 100 | Shows the maximum number of function arguments. |
| max_identifier_length | 63 | Shows the maximum identifier length. |
| max_index_keys | 32 | Shows the maximum number of index keys. |
| max_locks_per_transaction | 64 | Sets the maximum number of locks per transaction. |
| max_pred_locks_per_transaction | 64 | Sets the maximum number of predicate locks per transaction. |
| max_prepared_transactions | 0 | Sets the maximum number of simultaneously prepared transactions. |
| max_replication_slots | 0 | Sets the maximum number of simultaneously defined replication slots. |
| max_stack_depth | 2MB | Sets the maximum stack depth, in kilobytes. |
| max_standby_archive_delay | 30s | Sets the maximum delay before canceling queries when a hot standby server is processing archived WAL data. |
| max_standby_streaming_delay | 30s | Sets the maximum delay before canceling queries when a hot standby server is processing streamed WAL data. |
| max_wal_senders | 0 | Sets the maximum number of simultaneously running WAL sender processes. |
| max_wal_size | 1GB | Sets the WAL size that triggers a checkpoint. |
| max_worker_processes | 8 | Maximum number of concurrent worker processes. |
| min_wal_size | 80MB | Sets the minimum size to shrink the WAL to. |
| operator_precedence_warning | off | Emit a warning for constructs that changed meaning since PostgreSQL 9.4. |
| password_encryption | on | Encrypt passwords. |
| port | 5432 | Sets the TCP port the server listens on. |
| post_auth_delay | 0 | Waits N seconds on connection startup after authentication. |
| pre_auth_delay | 0 | Waits N seconds on connection startup before authentication. |
| quote_all_identifiers | off | When generating SQL fragments, quote all identifiers. |
| random_page_cost | 4 | Sets the planner's estimate of the cost of a nonsequentially fetched disk page. |
| restart_after_crash | on | Reinitialize server after backend crash. |
| row_security | on | Enable row security. |
| search_path | "$user", public | Sets the schema search order for names that are not schema-qualified. |
| segment_size | 1GB | Shows the number of pages per disk file. |
| seq_page_cost | 1 | Sets the planner's estimate of the cost of a sequentially fetched disk page. |
| server_encoding | UTF8 | Sets the server (database) character set encoding. |
| server_version | 9.5.14 | Shows the server version. |
| server_version_num | 90514 | Shows the server version as an integer. |
| session_preload_libraries | Lists shared libraries to preload into each backend. | |
| session_replication_role | origin | Sets the session's behavior for triggers and rewrite rules. |
| shared_buffers | 128MB | Sets the number of shared memory buffers used by the server. |
| shared_preload_libraries | Lists shared libraries to preload into server. | |
| sql_inheritance | on | Causes subtables to be included by default in various commands. |
| ssl | on | Enables SSL connections. |
| ssl_ca_file | Location of the SSL certificate authority file. | |
| ssl_cert_file | /etc/ssl/certs/ssl-cert-snakeoil.pem | Location of the SSL server certificate file. |
| ssl_ciphers | HIGH:MEDIUM:+3DES:!aNULL | Sets the list of allowed SSL ciphers. |
| ssl_crl_file | Location of the SSL certificate revocation list file. | |
| ssl_ecdh_curve | prime256v1 | Sets the curve to use for ECDH. |
| ssl_key_file | /etc/ssl/private/ssl-cert-snakeoil.key | Location of the SSL server private key file. |
| ssl_prefer_server_ciphers | on | Give priority to server ciphersuite order. |
| standard_conforming_strings | on | Causes '...' strings to treat backslashes literally. |
| statement_timeout | 0 | Sets the maximum allowed duration of any statement. |
| stats_temp_directory | /var/run/postgresql/9.5-main.pg_stat_tmp | Writes temporary statistics files to the specified directory. |
| superuser_reserved_connections | 3 | Sets the number of connection slots reserved for superusers. |
| synchronize_seqscans | on | Enable synchronized sequential scans. |
| synchronous_commit | on | Sets the current transaction's synchronization level. |
| synchronous_standby_names | List of names of potential synchronous standbys. | |
| syslog_facility | local0 | Sets the syslog "facility" to be used when syslog enabled. |
| syslog_ident | postgres | Sets the program name used to identify PostgreSQL messages in syslog. |
| tcp_keepalives_count | 0 | Maximum number of TCP keepalive retransmits. |
| tcp_keepalives_idle | 0 | Time between issuing TCP keepalives. |
| tcp_keepalives_interval | 0 | Time between TCP keepalive retransmits. |
| temp_buffers | 8MB | Sets the maximum number of temporary buffers used by each session. |
| temp_file_limit | -1 | Limits the total size of all temporary files used by each session. |
| temp_tablespaces | Sets the tablespace(s) to use for temporary tables and sort files. | |
| TimeZone | PRC | Sets the time zone for displaying and interpreting time stamps. |
| timezone_abbreviations | Default | Selects a file of time zone abbreviations. |
| trace_notify | off | Generates debugging output for LISTEN and NOTIFY. |
| trace_recovery_messages | log | Enables logging of recovery-related debugging information. |
| trace_sort | off | Emit information about resource usage in sorting. |
| track_activities | on | Collects information about executing commands. |
| track_activity_query_size | 1024 | Sets the size reserved for pg_stat_activity.query, in bytes. |
| track_commit_timestamp | off | Collects transaction commit time. |
| track_counts | on | Collects statistics on database activity. |
| track_functions | none | Collects function-level statistics on database activity. |
| track_io_timing | off | Collects timing statistics for database I/O activity. |
| transaction_deferrable ion failures | off | Whether to defer a read-only serializable transaction until it can be executed with no possible serializat |
| transaction_isolation | read committed | Sets the current transaction's isolation level. |
| transaction_read_only | off | Sets the current transaction's read-only status. |
| transform_null_equals | off | Treats "expr=NULL" as "expr IS NULL". |
| unix_socket_directories | /var/run/postgresql | Sets the directories where Unix-domain sockets will be created. |
| unix_socket_group | Sets the owning group of the Unix-domain socket. | |
| unix_socket_permissions | 0777 | Sets the access permissions of the Unix-domain socket. |
| update_process_title | on | Updates the process title to show the active SQL command. |
| vacuum_cost_delay | 0 | Vacuum cost delay in milliseconds. |
| vacuum_cost_limit | 200 | Vacuum cost amount available before napping. |
| vacuum_cost_page_dirty | 20 | Vacuum cost for a page dirtied by vacuum. |
| vacuum_cost_page_hit | 1 | Vacuum cost for a page found in the buffer cache. |
| vacuum_cost_page_miss | 10 | Vacuum cost for a page not found in the buffer cache. |
| vacuum_defer_cleanup_age | 0 | Number of transactions by which VACUUM and HOT cleanup should be deferred, if any. |
| vacuum_freeze_min_age | 50000000 | Minimum age at which VACUUM should freeze a table row. |
| vacuum_freeze_table_age | 150000000 | Age at which VACUUM should scan whole table to freeze tuples. |
| vacuum_multixact_freeze_min_age | 5000000 | Minimum age at which VACUUM should freeze a MultiXactId in a table row. |
| vacuum_multixact_freeze_table_age | 150000000 | Multixact age at which VACUUM should scan whole table to freeze tuples. |
| wal_block_size | 8192 | Shows the block size in the write ahead log. |
| wal_buffers | 4MB | Sets the number of disk-page buffers in shared memory for WAL. |
| wal_compression | off | Compresses full-page writes written in WAL file. |
| wal_keep_segments | 0 | Sets the number of WAL files held for standby servers. |
| wal_level | minimal | Set the level of information written to the WAL. |
| wal_log_hints | off | Writes full pages to WAL when first modified after a checkpoint, even for a non-critical modifications. |
| wal_receiver_status_interval | 10s | Sets the maximum interval between WAL receiver status reports to the primary. |
| wal_receiver_timeout | 1min | Sets the maximum wait time to receive data from the primary. |
| wal_retrieve_retry_interval | 5s | Sets the time to wait before retrying to retrieve WAL after a failed attempt. |
| wal_segment_size | 16MB | Shows the number of pages per write ahead log segment. |
| wal_sender_timeout | 1min | Sets the maximum time to wait for WAL replication. |
| wal_sync_method | fdatasync | Selects the method used for forcing WAL updates to disk. |
| wal_writer_delay | 200ms | WAL writer sleep time between WAL flushes. |
| work_mem | 4MB | Sets the maximum memory to be used for query workspaces. |
| xmlbinary | base64 | Sets how binary values are to be encoded in XML. |
| xmloption content fragments | content | Sets whether XML data in implicit parsing and serialization operations is to be considered as documents or |
| zero_damaged_pages | off | Continues processing past damaged page headers. |
3)查看參數文件的位置：postgres=# show config_file;
3、mysql參數
參考文章1：https://www.cnblogs.com/angryprogrammer/p/6667741.html