Re: Test request for Stats collector performance improvement

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Qingqing Zhou <zhouqq(at)cs(dot)toronto(dot)edu>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Test request for Stats collector performance improvement
Date: 2006-06-16 03:14:06
Message-ID: 200606160314.k5G3E6306468@candle.pha.pa.us
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Qingqing Zhou wrote:
>
> "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote
> >
> > Hm? I don't see any improvement there:
> >
>
> I was referening this sentence, though I am not sure why that's the
> expectation:
> >
> > "Bruce Momjian" <pgman(at)candle(dot)pha(dot)pa(dot)us> wrote
> > If the patch worked, the first and third times will be similar, and
> > the second time will be high.

I meant that the non-stats and the patched stats should be the similar,
and the stats without the patch (the second test) should be high.

> -- After patch --
>
> real 0m1.275s
> user 0m0.097s
> sys 0m0.160s
>
> real 0m4.063s
> user 0m0.663s
> sys 0m0.377s
>
> real 0m1.259s
> user 0m0.073s
> sys 0m0.160s

I assume the above is just running the same test three times, right?

--
Bruce Momjian http://candle.pha.pa.us
EnterpriseDB http://www.enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +

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