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Home -> Community -> Usenet -> c.d.o.server -> Lots of "log file sync" waits and nothing else on inserts and commits
I'm really puzzled. Check out the session event stats for my session
below.
According to Note 223117.1 from Metalink, if you have a bunch of "log file sync" waits, and not as many "log file parallel write" waits then the problem is not I/O on the redo logs.
In this operation, which is all inserts and commits, we have tons of log file syncs, small cpu (not reflected below, but true) and no log file parallel write waits.
Any ideas?
1* select event,time_waited from v$session_event where sid=23 SQL> /
EVENT TIME_WAITED ------------------------------------------------------ ----------- latch 4 free buffer waits 10047 buffer busy 5 log buffer space 15324 log file switch completion 232 log file sync 388300 db file sequential read 4536 db file scattered read 3696 db file parallel read 0 direct path read 5 direct path write 6067 undo segment extension 0 SQL*Net message to client 18 SQL*Net message from client 59222 SQL*Net more data from client 173 SQL*Net break/reset to client 1255
16 rows selected. Received on Wed Jan 28 2004 - 15:43:32 CST