Who is doing most commits in the database

Question

10.2.0.4 on Sun Solaris.
We are seeing lot of log file sync waits in our database. ( from AWR report ).
Is there a way to find which user is doing the most commits causing this waits. I have been looking at DBA_HIST_SQLSTAT and like views but getting no where.
Your help is appreciated. Thanks

Answer 1

If you can check the system for right now and potentially save this information on a periodic basis here is query that should work:
SQL> select t1.sid, t1.value, t3.username
  2  from   v$sesstat t1, v$statname t2, v$session t3
  3  where  t2.name = 'user commits'
  4  and    t2.statistic# = t1.statistic#
  5  and    t1.value = ( select max(ss.value)
  6                      from   v$sesstat ss, v$statname sn
  7                      where  ss.statistic# = sn.statistic#
  8                      and    sn.name = 'user commits'
  9                    )
10  and    t1.sid = t3.sid
11  /
       SID      VALUE USERNAME
       248     205282 PRODBATCHHTH -- Mark D Powell --
PS I get the same sid if I change the statistic to redo synch writes though the two values differ.
Edited by: Mark D Powell on Feb 19, 2010 10:55 AM