From: Gregory Stark <stark@enterprisedb.com>
To: Mark Wong <markwkm@gmail.com>
Cc: pgsql-performance\@postgresql.org <pgsql-performance@postgresql.org>
Cc: Selena Deckelmann <selenamarie@gmail.com>
Cc: Gabrielle Roth <gorthx@gmail.com>
Subject: Re: dbt-2 tuning results with postgresql-8.3.5
Date: Mon, 22 Dec 2008 10:35:35 +0000
Message-ID: <878wq8v6o8.fsf@oxford.xeocode.com> (raw)
In-Reply-To: <70c01d1d0812220050kb1f755etea3ecada3f3b8631@mail.gmail.com>
References: <70c01d1d0812201654i5f55150ep619a6c7ff094470@mail.gmail.com>
<87hc4yuxbl.fsf@oxford.xeocode.com>
<552F108E-9732-4ED6-B45D-6C651C63565E@gmail.com>
<87d4fkvgtj.fsf@oxford.xeocode.com>
<70c01d1d0812220050kb1f755etea3ecada3f3b8631@mail.gmail.com>
"Mark Wong" <markwkm@gmail.com> writes:
>> I'm not sure how bad that is for the benchmarks. The only effect that comes to
>> mind is that it might exaggerate the effects of some i/o intensive operations
>> that under normal conditions might not cause any noticeable impact like wal
>> log file switches or even checkpoints.
>
> I'm not sure I'm following.
All I'm saying is that the performance characteristics won't be the same when
the service wait times are 1-10 seconds rather than the 20-30ms at which alarm
bells would start to ring on a real production system.
I'm not exactly sure what changes it might make though.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Ask me about EnterpriseDB's RemoteDBA services!
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To: pgsql-performance@postgresql.org
Cc: stark@enterprisedb.com, markwkm@gmail.com, selenamarie@gmail.com, gorthx@gmail.com
Subject: Re: dbt-2 tuning results with postgresql-8.3.5
In-Reply-To: <878wq8v6o8.fsf@oxford.xeocode.com>
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