Re: vacuuming not working?

Ok, some further experimentation has proven that this problem does not
manifest itself if there are ZERO connections to the database (aside from
the actual connection doing the insert/delete/vacuum) ... The vacuum command
correctly reclaims the space and the on-disk file never grows beyond a
certain size ...

So, here's the million dollar question ... and one that may or may not be a
postgres question ... I normally have a pool of connections connected to
postgres from my application server (jboss) ... they are all normally in the
"idle in transaction" state (if i do a ps -ax, they are all listed as "idle
in transaction") ... the question is, are these other connections actually
holding open a transaction that would prevent the table from being properly
vacuumed? if so, is there anything that i can do about it ... (yes, i
suppose i need to figure out why the JDBC connections have transactions
started before they're actually needed) ... and was this the case with
postgres 7.1.3?

but i figured i'd run it by the experts too ... ;)

-dave

> -----Original Message-----
> From: pgsql-general-owner(at)postgresql(dot)org
> [mailto:pgsql-general-owner(at)postgresql(dot)org]On Behalf Of Tom Lane
> Sent: Monday, April 08, 2002 3:53 PM
> To: David Esposito
> Cc: Jeffrey W. Baker; Postgres general mailing list
> Subject: Re: [GENERAL] vacuuming not working?
>
>
> "David Esposito" <dvesposito(at)newnetco(dot)com> writes:
> > i took a peek at pg_stat_activity and it doesn't appear as
> though any of the
> > processes are doing anything ... they all have blanks for
> "current_query"
>
> Read
> http://www.ca.postgresql.org/users-lounge/docs/7.2/postgres/monito
> ring-stats.html
>
> > Is there any way to get timestamps turned on in the log file?
>
> There's a flag in postgresql.conf. You might wanna turn on log_pid too.
>
> regards, tom lane
>
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