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Re: Tuning PostgreSQL

From: Ang Chin Han <angch(at)bytecraft(dot)com(dot)my>
To: shridhar_daithankar(at)persistent(dot)co(dot)in
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Tuning PostgreSQL
Date: 2003-07-21 11:27:54
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Shridhar Daithankar wrote:

> Good for you. You have time at hand to find out which one suits you best. Do 
> the testing before you have load that needs another FS..:-)

Kinda my point is that when we've more load, we'd be using RAID-0 over 
RAID-5, or getting faster SCSI drives, or even turn fsync off if that's 
a bottleneck, because the different filesystems do not have that much 
performance difference[1] -- the filesystem is not a bottleneck. Just 
need to tweak most of them a bit, like noatime,data=writeback.

[1] That is, AFAIK, from our testing. Please, please correct me if I'm 
wrong: has anyone found that different filesystems produces wildly 
different performance for postgresql, FreeBSD's filesystems not included?

Linux homer 2.4.18-14 #1 Wed Sep 4 13:35:50 EDT 2002 i686 i686 i386 
   7:00pm  up 207 days, 10:05,  5 users,  load average: 5.00, 5.03, 5.06

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