On Tue, 2005-03-22 at 14:44 -0600, Brandon Metcalf wrote: > We've recently moved our pgsql installation and DBs to a Solaris 8 > machine with striped and mirrored ufs filesystem that houses the DB > data. We are now seeing terrible performance and the bottleneck is no > doubt disk I/O. > > We've tried modifying a tunables related to ufs, but it doesn't seem > to be helping. > > Is there anything we should be looking at that is specifically related > to ufs filesystems on Solaris 8 or possibly something in general that > would improve performance? > > Thanks. >
What are you using to create your raid? You say it is "no doubt disk I/O" - does iostat confirm this? A lot of performance issues are related to the size of the stripe you chose for the striped portion of the array, the actual array configuration, etc. I am assuming you have looked at system variables such as autoup and the likes? What tweaks have you done? Also, are your pg_xlog and data directories separated onto separate volumes? Doing so will help immensely. What are you using to measure performance? Sven ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly