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Re: Curious about dead rows.

From: Andrew Sullivan <ajs(at)crankycanuck(dot)ca>
To: Jean-David Beyer <jeandavid8(at)verizon(dot)net>,pgsql-performance(at)postgresql(dot)org
Subject: Re: Curious about dead rows.
Date: 2007-11-13 15:21:11
Message-ID: (view raw or whole thread)
Lists: pgsql-performance
Please don't drop the list, as someone else may see something.

On Tue, Nov 13, 2007 at 10:06:13AM -0500, Jean-David Beyer wrote:
> OK. I turned logging from "none" to "mod" and got a gawdawful lot of stuff.


> Then I ran it and got all the inserts. Using
> grep -i delete file
> grep -i update file
> grep -i rollback file

How about ERROR?

> 2007-11-13 08:11:20 EST DEBUG:  "vl_ranks": scanned 540 of 540 pages,
> containing 67945 live rows and 554 dead rows; 3000 rows in sample, 67945
> estimated total rows

If there are dead rows, something is producing them.  Either INSERT is
firing a trigger that is doing something there (you won't see an UPDATE in
that case), or else something else is causing INSERTs to fail.


Andrew Sullivan
Old sigs will return after re-constitution of blue smoke

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