Greenplum 元數據信息 1
1、 獲取集羣中數據庫信息 2
1.1 集羣中的創建的數據庫信息 2
1.2 查看每個數據庫的儲存大小 2
2、 查看數據庫下schema信息 2
2.1 查看數據庫下創建的schema信息 2
2.2 查看數據庫下每個schema的大小 2
3、 查看schema下表的信息 2
3.1 查看schema下的表的清單 2
3.2 查看錶的字段的信息 3
3.3 查看schema下的每個表的大小 3
3.4 獲取表的生命週期 3
3.5 獲取表的膨脹率 4
3.6 查看錶的傾斜率 4
3.7 查看需要Analyze的表 4
3.8 查看錶的字段個類型信息 4
3.9 查看錶字段的註釋信息 4
4 查看集羣中用戶相關的信息 5
4.1 集羣中創建的用戶信息 5
4.2 用戶創建的表信息 5
5 集羣中Function的信息 6
5.1 查看創建的所有Function的信息 6
5.2 查看制定schema下的Function信息 6
6 集羣中資源隊列的信息 6
6.1 查看創建的資源隊列 6
6.2 查看資源隊列的參數配置 6
7 集羣中正在運行的SQL信息 7
7.1 查看正在運行的SQL信息 7
8 查詢數據庫與表的年齡 7
8.1 查詢數據庫的年齡 7
8.2 查詢表的年齡 7
1、獲取集羣中數據庫信息
1.1 集羣中的創建的數據庫信息
select datname from pg_database where datname not in ('template1','template0','postgres');
1.2 查看每個數據庫的儲存大小
select pg_size_pretty(pg_database_size('databases')) as databasesize, 'databases' as databasename
databases : 數據庫信息
2、查看數據庫下schema信息
2.1 查看數據庫下創建的schema信息
select nspname as schemaname from pg_namespace where nspname!~'pg_*' ORDER BY nspname
2.2 查看數據庫下每個schema的大小
select pg_size_pretty(cast(sum(pg_relation_size( schemaname || '.' || tablename)) as bigint)), schemaname
from pg_tables t inner join pg_namespace d on t.schemaname=d.nspname group by schemaname;
3、查看schema下表的信息
3.1 查看schema下的表的清單
select 'schemaname '||'.'||c.relname as tablename
from pg_catalog.pg_class c, pg_catalog.pg_namespace n
where
n.oid = c.relnamespace
and n.nspname='schemaname '
and pc.relstorage IN ('type')
schemaname : schema的名字
type：a和c是AO表,h是heap表,x是外表
3.2 查看錶的字段的信息
select table_schema||'.'||table_name as tablename,column_name,
case character_maximum_length is null
when 't' then data_type
else data_type||'('||character_maximum_length||')' end as character_maximum_length
from information_schema.columns where table_schema='schema'
and table_name='tablename';
schema : schema的信息
Tablename : 表的名字
3.3 查看schema下的每個表的大小
select schemaname||'.'||tablename,
pg_relation_size(schemaname || '.' || tablename)/1024/1024/1024 as tablesize
from pg_tables t inner join pg_namespace d on t.schemaname=d.nspname
and nspname='schema '
ORDER BY tablesize desc
limit 100;
schema : schema的信息
3.4 獲取表的生命週期
select staactionname,stausename,stasubtype,to_char(statime,'yyyy-mm-dd hh24:mm:ss')||'' as statime
from pg_stat_last_operation where objid = 'tablename'::regclass order by statime desc
tablename : 表的名字
3.5 獲取表的膨脹率
select percent_hidden
from gp_toolkit.__gp_aovisimap_compaction_info('main.t_ent_baseinfo'::regclass)
ORDER BY percent_hidden desc;
3.6 查看錶的傾斜率
SELECT max(c) AS MaxSegRows, min(c) AS MinSegRows,
substr((max(c)-min(c))*100.0/max(c)||'',0,8) AS PercentageDifferenceBetween
FROM (SELECT count(*) c, gp_segment_id FROM tablename
GROUP BY 2) AS a
tablename : 表的名字
3.7 查看需要Analyze的表
select smischema||'.'||smitable as tablename,smisize,smicols,smirecs from gp_toolkit.gp_stats_missing where smisize='f' limit 10;
3.8 查看錶的字段個類型信息
select table_schema||'.'||table_name as tablename,column_name,
case character_maximum_length is null
when 't' then data_type
else data_type||'('||character_maximum_length||')' end as character_maximum_length
from information_schema.columns where table_schema='schema'
and table_name='tablename';
schema ： schem信息
tablename : 表的名字
3.9 查看錶字段的註釋信息
SELECT 'tablename' as table_name
,a.attname AS column_name
,format_type(a.atttypid, a.atttypmod) AS data_type
,d.description AS description
,a.attnum
,a.attnotnull AS notnull
,coalesce(p.indisprimary, FALSE) AS primary_key
,f.adsrc AS default_val
FROM pg_attribute a
LEFT JOIN pg_index p ON p.indrelid = a.attrelid AND a.attnum = ANY(p.indkey)
LEFT JOIN pg_description d ON d.objoid = a.attrelid AND d.objsubid = a.attnum
LEFT JOIN pg_attrdef f ON f.adrelid = a.attrelid AND f.adnum = a.attnum
WHERE a.attnum > 0
AND NOT a.attisdropped
AND a.attrelid = 'tablename'::regclass
ORDER BY a.attnum;
tablename : 表的名字
4 查看集羣中用戶相關的信息
4.1 集羣中創建的用戶信息
select rolname,case rolsuper when 't' then '是管理員' when 'f' then '不是管理員'
end as rolsuper, case rolcreaterole when 't' then '可以創建角色' when 'f' then '不可以創建角色' end as rolcreaterole,
case rolcreatedb when 't' then '可以創建DB' when 'f' then '不可以創建DB' end as rolcreatedb,
case rolcanlogin when 't' then '可以登錄' when 'f' then '不可以登錄' end as rolcanlogin,
case rolconnlimit when '-1' then '沒有限制' else '有限制' end as rolconnlimit,
case when rolvaliduntil is null then '永不失效' else '有失效時間' end as rolvaliduntil,rsqname
from pg_roles,gp_toolkit.gp_resqueue_status where rolname not like 'gpcc%' and pg_roles.rolresqueue=gp_toolkit.gp_resqueue_status.queueid
order by rolname
4.2 用戶創建的表信息
select grantee,table_schema||'.'||table_name as tablename,privilege_type,is_grantable
from information_schema.table_privileges where grantee= 'gpadmin' limit 100
5 集羣中Function的信息
5.1 查看創建的所有Function的信息
SELECT pg_proc.proname AS proname,pg_type.typname AS typename,
pg_proc.pronargs AS argscount FROM pg_proc JOIN pg_type ON
(pg_proc.prorettype = pg_type.oid) WHERE pg_type.typname != 'void'
and pg_proc.proname like 'sp_%' ORDER BY pg_proc.proname ;
void : 返回的類型
sp_% : 函數的前綴
5.2 查看制定schema下的Function信息
SELECT pg_proc.proname AS proname,pg_type.typname AS typename,
pg_proc.pronargs AS argscount FROM pg_proc JOIN pg_type ON
(pg_proc.prorettype = pg_type.oid) WHERE pg_type.typname != 'void'
and pg_proc.proname like 'sp_%' and pronamespace = (SELECT pg_namespace.oid FROM pg_namespace WHERE nspname = 'schema' )
ORDER BY pg_proc.proname ;
void : 返回的類型
sp_% : 函數的前綴
schema : 制定的schema的信息
6 集羣中資源隊列的信息
6.1 查看創建的資源隊列
select * from pg_resqueue
6.2 查看資源隊列的參數配置
select rsqname,resname,ressetting from pg_resqueue_attributes
7 集羣中正在運行的SQL信息
7.1 查看正在運行的SQL信息
select datname,procpid,usename,current_query,waiting,
to_char(query_start,'yyyy-mm-dd hh24:mm:ss') as query_start,
to_char(backend_start,'yyyy-mm-dd hh24:mm:ss') as backend_start,
((substr(now()||'',0,20)::timestamp) - (substr(query_start||'',0,20)::timestamp))||'' as takingTime,
client_addr,application_name,waiting_reason from pg_stat_activity where current_query <> '<IDLE>'
order by takingTime desc
8 查詢數據庫與表的年齡
8.1 查詢數據庫的年齡
select datname,age(datfrozenxid) from pg_database where age(datfrozenxid) > 1500000000
1500000000: 15億的年齡
如果超過15億，建議用戶在業務空閒時間段，執行：
set vacuum_freeze_min_age = 0;
vacuum freeze;
8.2 查詢表的年齡
select * from (
select pt.schemaname||'.'||ts.relname as tablename,
pg_relation_size(pt.schemaname||'.'||ts.relname)/1024/1024/1024 as tablesizegb,
ts.relfrozenxid,ts.stausename,ts.stasubtype,ts.statime from (
SELECT ps.stausename,ps.staactionname,ps.stasubtype,pc.relname,ps.statime,age(relfrozenxid) as relfrozenxid
FROM pg_stat_last_operation ps,pg_class pc WHERE ps.objid = pc.oid
and age(pc.relfrozenxid) > 1500000000
) ts,pg_tables pt
where ts.relname = pt.tablename
order by tablesizegb desc
) txd
where txd.tablesizegb > 0
1500000000 : 15億的年齡
tablename : 表的名字
如果超過15億，建議用戶在業務空閒時間段，執行：
set vacuum_freeze_min_age = 0;
vacuum freeze tablename;
