今天偷个懒,总结一下Oracle游标数的一些常用sql,下面一起来看看吧~
1. 查看系统游标数(最大游标数)
- select value from v$parameter where name = 'open_cursors';
- show parameter open_cursors;
2. 查看当前打开的游标数目
- select count(*) from v$open_cursor;
3. 查看游标使用情况
- select o.sid, osuser, machine,o.sql_id,o.sql_text,o.cursor_type, count(*) num_curs
- from v$open_cursor o, v$session s
- where user_name = 'GLOGOWNER'
- and o.sid = s.sid
- group by o.sid, osuser, machine,o.sql_id,o.sql_text,o.cursor_type
- order by num_curs desc;
4. 修改Oracle最大游标数
根据游标占用情况分析访问数据库的程序在资源释放上是否正常,如果程序释放资源没有问题,则加大游标数。
- alter system set open_cursors=2000 scope=both;
5. 各用户的打开游标总数
- SELECT A.USER_NAME, COUNT(*) FROM V$OPEN_CURSOR A GROUP BY A.USER_NAME;
6. 查找数据库各用户各个终端的缓存游标数
- SELECT AA.USERNAME, AA.MACHINE, SUM(AA.VALUE)
- FROM (SELECT A.VALUE, S.MACHINE, S.USERNAME
- FROM V$SESSTAT A, V$STATNAME B, V$SESSION S
- WHERE A.STATISTIC# = B.STATISTIC#
- AND S.SID = A.SID
- AND B.NAME = 'session cursor cache count') AA
- GROUP BY AA.USERNAME, AA.MACHINE
- ORDER BY AA.USERNAME, AA.MACHINE;
7. 查找数据库各用户各个终端的打开游标数
- SELECT AA.USERNAME, AA.MACHINE, SUM(AA.VALUE)
- FROM (SELECT A.VALUE, S.MACHINE, S.USERNAME
- FROM V$SESSTAT A, V$STATNAME B, V$SESSION S
- WHERE A.STATISTIC# = B.STATISTIC#
- AND S.SID = A.SID
- AND B.NAME = 'opened cursors current') AA
- GROUP BY AA.USERNAME, AA.MACHINE
- ORDER BY AA.USERNAME, AA.MACHINE;