Any ideas of how to identify the application process that is the
postgres process (whose id I know). Perhaps I need to turn on a
different log flag?
select * from pg_stat_activity will give you the pid :)
Joshua D. Drake
Thanks
Ike
-----Original Message-----
From: Tom Lane [mailto:[EMAIL PROTECTED]
Sent: Monday, August 21, 2006 2:06 PM
To: Eamonn Kent
Cc: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Vacuum not identifying rows for removal..
"Eamonn Kent" <[EMAIL PROTECTED]> writes:
I am using PostgreSQL 8.1.4 for an embedded application. For some
reason, vacuum is not able to identify rows that are candidates for
removal (i.e., mark space as available).
...
We run auto vacuum and I can see from the logs that it is running
quite
frequently. When I run vacuum full from the psql, I can see that space
is not being recovered. I have run vacuum full with the verbose flag
set, I can see that messages that indicate the existence of "dead row
versions that cannot be removed yet.
This means you've got an open transaction somewhere that could
potentially still be able to see those rows. Look around for
applications sitting "idle in transaction".
regards, tom lane
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