发布时间：2012-12-21 09:21:49

Problem Description: We are receiving the below warning during db startup:WARNING: kqlclo() has detected the following :Non-existent object 37336 NOT deleted because an objectof the same name exists already.Object name: PUBLIC.USER$This is caused by the SMON trying to cleanup the SYS.OJB$.SMON clean......【阅读全文】

发布时间：2012-12-20 16:34:39

Total System Global Area 1065353216 bytesFixed Size 2089336 bytesVariable Size 486542984 bytesDatabase Buffers 570425344 bytesRedo Buffers 6295552 bytesDatabase mounted.Database opened.SQL> select count(*) from user$ u, obj$ o 2 where......【阅读全文】

发布时间：2012-12-18 09:22:49

可以设置10513事件来临时禁止SMON恢复死事务，这在我们做某些异常恢复的时候显得异常有效，当然不建议在一个正常的生产环境中设置这个事件: SQL> alter system set events '10513 trace name context forever, level 2';   System altered.   10531 -- event disables transaction recovery which was initiated by SMON   SQL> select ktux......【阅读全文】

发布时间：2012-12-17 13:34:03

oracle dbahttp://www.cuug.com/ fast_start_parallel_rollback参数决定了SMON在回滚事务时使用的并行度，若将该参数设置为false那么并行回滚将被禁用，若设置为Low(默认值)那么会以2*CPU_COUNT数目的并行度回滚，当设置为High则4*CPU_COUNT数目的回滚进程将参与进来。当我们通过以下查询发现系统中存在大的dead tranacation需要回滚时我们可以通过设置fast_start_parallel_rollback为HIGH来加速恢复: select sum(distinct(ktuxesiz)) from ......【阅读全文】

发布时间：2012-12-14 17:22:47

==================smon trace content================== SMON: system monitor process posted WAIT #0: nam='log file switch completion' ela= 0 p1=0 p2=0 p3=0 obj#=1 tim=1278243332801935 WAIT #0: nam='log file switch completion' ela= 0 p1=0 p2=0 p3=0 obj#=1 tim=1278243332815568 WAIT #0: n......【阅读全文】