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Re: FreeBSD upgrade causes performance degredation


  • From: Sean Chittenden <sean(at)chittenden(dot)org>
  • To: Peter Schmidt <peterjs(at)home(dot)com>
  • Cc: pgsql-admin(at)postgresql(dot)org
  • Subject: Re: FreeBSD upgrade causes performance degredation
  • Date: Mon, 29 Oct 2001 12:30:55 -0800
  • Message-id: <20011029123055.B89061@ninja1.internal> <text/plain>

> FreeBSD 4.1 vs FreeBSD 4.4 on X86
> Postrgesql 7.03
> 
> We are experiencing a siginficant drop in performance in some PostgreSQL
> database operations after upgrading FreeBSD 4.1 to FreeBSD 4.4. Database
> connections appear to be twice as slow while calling some of our own
> functions can take 10x longer.  Does anyone have any ideas why this is
> occurring?

When you say upgrading, how'd you upgrade?  Source upgrade, or is it a
build from scratch (CD install)?  If it's a build from scratch, I'd
run through tuning(7) and enable soft-updates if they're not already
on.  When you say it's slower, it sounds like disk-access is slower.
Have you tuned the postgresql config?  -sc



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