Re: Test request for Stats collector performance improvement - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: Test request for Stats collector performance improvement
Date
Msg-id 200606160357.k5G3vN112941@candle.pha.pa.us
Whole thread Raw
In response to Re: Test request for Stats collector performance improvement  ("Qingqing Zhou" <zhouqq@cs.toronto.edu>)
List pgsql-hackers
Qingqing Zhou wrote:
> 
> "Bruce Momjian" <pgman@candle.pha.pa.us> wrote
> >
> > > -- 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?
> >
> 
> Right -- it is the result of the patched CVS tip runing three times with
> stats_command_string = on. And the tests marked "--Before patch--" is the
> result of CVS tip running three times with stats_command_string = on.

Any idea why there is such a variance in the result?  The second run
looks quite slow.

--  Bruce Momjian   http://candle.pha.pa.us EnterpriseDB    http://www.enterprisedb.com
 + If your life is a hard drive, Christ can be your backup. +


pgsql-hackers by date:

Previous
From: Tom Lane
Date:
Subject: Re: Re-thing PG_MODULE_MAGIC
Next
From: Bruce Momjian
Date:
Subject: Re: Re-thing PG_MODULE_MAGIC