SUM(a.wait_time + a.time_waited) total_wait_time FROM v$active_session_history a WHERE a.sample_time BETWEEN SYSDATE - 30 / 2880 AND SYSDATE GROUP BY a.event ORDER BY total_wait_time DESC; --等待最多的用户 SELECT s.
SQL> select to_char(sample_time,'yyyy-mm-dd hh24:mi:ss'),program,session_id,event,seq#,BLOCKING_SESSION,BLOCKING_INST_ID from m_ash where program like '%LGWR%' and inst_id=2 order by 1;TO_CHAR(SAMPLE_TIME PROGRAM SESSION_ID EVENT SEQ# BLOCKING_SESSION BLOCKING_INST_ID--...
SQL>selectto_char(sample_time,'yyyy-mm-dd hh24:mi:ss'),program,session_id,event,seq#,BLOCKING_SESSION,BLOCKING_INST_IDfrom m_ash where program like'%LGWR%'and inst_id=2order by1;TO_CHAR(SAMPLE_TIMEPROGRAMSESSION_IDEVENTSEQ#BLOCKING_SESSIONBLOCKING_INST_ID---...2020-03-0715:44:40ora...
selectto_char(sample_time,'yyyy-mm-dd hh24:mi:ss') timekey,--ash.session_id,--ash."SESSION_SERIAL#",--ash."MODULE"count(*)assql_countfromdba_hist_active_sess_history ashwhereash.instance_number=1andash."SQL_ID"='6ac0x1yudr8gq'andash.sample_timebetweento_date('2018-12-23 08:...
SQL> select to_char(sample_time,'yyyy/mm/dd hh24:mi'),count(*) 2 from m_dba_hist_active_sess_history 3 where instance_number=1 4 and PROGRAM like 'JDBC Thin Client' 5 group by to_char(sample_time,'yyyy/mm/dd hh24:mi') having count(*)>10 order by to_char(sample_time,'...
Sample Time***:采样时间 Data Source***:数据来源 Analysis Begin Time:开始采样时间 Analysis End Time::采用结束时间 Elapsed Time:采样经历时间 Sample*** Count:样本数量 Average*** Active Sessions:平均活跃会话数 Avg. Active Session per CPU:***平均cpu会话数 3.2 Top...
上面time_waited、average_wait的单位为百分之一秒(in hundredths of a second), 'log file parallel write'事件的平均等待时间大于 10ms (or 1cs),这通常意味着存在较慢的I/O吞吐量。 LGWR进程写入慢会影响用户事务提交的时间。 If the log file parallel write average wait time is greater than 10ms (...
Oracle的文档上描述,当不包含SAMPLE语句的时候,可以使用HINT来指定执行计划,实际上即使包含SAMPLE语句,HINT也是生效的。 SQL> SELECT OBJECT_ID FROM T SAMPLE (1) WHERE WNER = USER; OBJECT_ID --- 60607 70958 执行计划 --- Plan hash value: 3630032853 --- | Id | Operation |...
对于普通的SAMPLE语句,Oracle每次返回的结果是不固定的: SQL> SELECT OBJECT_ID FROM T SAMPLE (0.01); OBJECT_ID --- 35199 执行计划 --- Plan hash value: 2767392432 --- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | ---...
Sample analyses Sales pipeline Win-loss Lead prioritization Quote efficiency Subscription pipeline Campaign efficiency Account-based analysis Service effectiveness Unleash the power of CX with industry-specific solutions Unleash the power of innovative technologies and connected applications that enable you to ...