Re: 7.1 vs. 7.2 on AIX 5L

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: 7.1 vs. 7.2 on AIX 5L
Date: 2002-01-10 20:08:26
Message-ID: 200201102008.g0AK8Rd11467@candle.pha.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

Tom Lane wrote:
> Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp> writes:
> > I have made a new version of pgbench which allows not to update
> > branches and tellers tables, which should significantly reduce the
> > contentions.
>
> I used this version of pgbench in some fresh runs on RedHat's 4-way SMP
> Linux box. I did several test runs under varying conditions (pgbench
> scale 500 or 50, checkpoint_segments/wal_files either default 3/0 or
> 30/5, fsync on or off). I compared current CVS tip (including the
> now-committed lwlock rev 2 patch) to 7.1.3. The results are attached.
> As you can see, current beats 7.1 pretty much across the board on that
> hardware. The reason seems to be revealed by looking at vmstat output.
> Typical "vmstat 5" output for 7.1.3 (here in a 6-client pgbench -N
> run) is

Those are dramatic graphs. Is it the WAL increase that made 7.2 much
faster?

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message Tom Lane 2002-01-10 21:23:44 Sequence rows need to have FrozenTransactionId
Previous Message Bruce Momjian 2002-01-10 19:52:13 Re: [HACKERS] pg_upgrade