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Re: Insertion to temp table deteriorating over time

From: "Steven Flatt" <steven(dot)flatt(at)gmail(dot)com>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Insertion to temp table deteriorating over time
Date: 2006-12-15 18:26:31
Message-ID: 357fa7590612151026t4ae033f6w5367cac9d0b67064@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
Good question, and I agree with your point.

Are the removable rows in pg_class even an issue?  So what if 5000-6000 dead
tuples are generated every hour then vacuumed?  Performance continues to
steadily decline over a few days time.  Memory usage does not appear to be
bloating.  Open file handles remain fairly fixed.  Is there anything else I
can monitor (perhaps something to do with the odbc connection) that I could
potentially correlate with the degrading performance?

Steve


On 12/15/06, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> Oh, then where *are* the removable rows coming from?  At this point I
> think that the truncate/refill thing is not the culprit, or at any rate
> is only one part of a problematic usage pattern that we don't see all of
> yet.
>
>                        regards, tom lane
>

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