Did you increase the checkpoint segments and changed the default WAL lock method to fdsync?
http://blogs.sun.com/jkshah/entry/postgresql_on_solaris_better_use
Try fdsync instead of fysnc as mentioned in the entry.
Regards,
Jignesh
Junaili Lie wrote:
Hi everyone,
We have a postgresql 8.1 installed on Solaris 10. It is running fine.
However, for the past couple days, we have seen the i/o reports
indicating that the i/o is busy most of the time. Before this, we only
saw i/o being busy occasionally (very rare). So far, there has been no
performance complaints by customers, and the slow query reports doesn't
indicate anything out of the ordinary.
There's no code changes on the applications layer and no database
configuration changes.
I am wondering if there's a tool out there on Solaris to tell which
process is doing most of the i/o activity?
Thank you in advance.
J
