oracle监控常用语句

原創

2020-02-20 23:47

--数据库实例查询
select * from gv$version;

--RDBMS信息
select * from gv$version where Banner like '%Oracle%';

--SQL &Net版本信息
select * from gv$version where Banner like '%TNS%';

--SGA信息(Database Buffer)
select s.*,round(s.value/1024/1024) from gv$sga s where name = 'Database Buffers'

--SGA(Shared pool)
select s.*,round(s.bytes/1024/1024) from gv$sgainfo s where name = 'Shared Pool Size'

--SGA(LOG Buffers)
select s.*,round(s.bytes/1024/1024) from gv$sgastat s where s.name='log_buffer'

--DB_BLOCK Size
select p.value/1024,p.* from gv$parameter p where name = 'db_block_size'

--表空间信息
select * from dba_tablespaces;

--表空间使用率
select f.tablespace_name,
a.total 总共M,
f.free 空闲M,
round((f.free / a.total) * 100) "空闲比率"
from (select tablespace_name, sum(bytes / (1024 * 1024)) total
from dba_data_files
group by tablespace_name) a,
(select tablespace_name, round(sum(bytes / (1024 * 1024))) free
from dba_free_space
group by tablespace_name) f
WHERE a.tablespace_name = f.tablespace_name(+)
order by "空闲比率";

--数据文件：
select * from dba_data_files;

--控制文件状态:
select * from v$controlfile;

--在线日志状态
select group# as 日志组，
member 地址,
status 状态,
is_recovery_dest_file
from v$logfile;

--相关参数查看（session，processes）
select resource_name,max_utilization,initial_allocation,limit_value from v$resource_limit;

--最大游标(一个session执行语句数量)
select * from gv$parameter where name like '%cursor%';

--CPU使用率
SELECT round(t1.value*100/(t1.value+t2.value),4)||'%' 使用率,
s.begin_interval_time 开始时间
s.end_interval_time 结束时间
t1.*,t2.*,
FROM dba_hist_osstat t1,dba_hist_snapshot s,dba_hist_osstat t2
WHERE t1.stat_name = 'BUSY_TICKS'
and t2.stat_name = 'IDLE_TICKS'
and t1.snap_id = s.snap_id
and t2.snap_id = s.snap_id
and s.begin_interval_time >= TO_TIMESTAMP('2015-01-19 ', 'yyyy-mm-dd hh24')
and s.begin_interval_time < TO_TIMESTAMP('2015-01-19 20', 'yyyy-mm-dd hh24');

--最大内存
select * from gv$parameter p where name = 'sga_target'

--内存使用率
SELECT round(t.bytes*100/1073741824)||'%' 使用率,
to_char(s.begin_interval_time,'yyyy-mm-dd hh24:mi:ss') 开始时间,
to_char(s.end_interval_time,'yyyy-mm-dd hh24:mi:ss') 结束时间
FROM dba_hist_sgastat t,dba_hist_snapshot s
where t.snap_id = s.snap_id
and t.name = 'free memory'
and t.pool = 'shared pool'
and s.begin_interval_time >= TO_TIMESTAMP('2015-01-19 08', 'yyyy-mm-dd hh24')
and s.begin_interval_time < TO_TIMESTAMP('2015-01-19 20', 'yyyy-mm-dd hh24')
order by s.begin_interval_time;

--历史session 统计
select to_char(s.begin_interval_time,'yyyy-mm-dd hh24:mi:ss') 开始时间,
to_char(s.end_interval_time,'yyyy-mm-dd hh24:mi:ss') 结束时间,
count(session_id)
from dba_hist_active_sess_history h,dba_hist_snapshot s
where h.snap_id = s.snap_id
and s.begin_interval_time >= TO_TIMESTAMP('2015-01-19 08', 'yyyy-mm-dd hh24')
and s.begin_interval_time < TO_TIMESTAMP('2015-01-19 20', 'yyyy-mm-dd hh24')
and h.session_type = 'FOREGROUND'
and h.sql_id is not null
group by to_char(s.begin_interval_time,'yyyy-mm-dd hh24:mi:ss'),to_char(s.end_interval_time,'yyyy-mm-dd hh24:mi:ss')
;

--具体运行sql语句查询
select * from dba_hist_sqltext where sql_id = '';

--无效对象
select owner,object_name,object_type from dba_objects where status!='VALID' and owner!='SYS' and owner!='SYSTEM';

--IO查询
select * from v$iostat_file;
select * from dba_hist_iostat_filetype;