Re: pg 8.1.2 performance issue - Mailing list pgsql-general

From Ed L.
Subject Re: pg 8.1.2 performance issue
Date
Msg-id 200603311151.20354.pgsql@bluepolka.net
Whole thread Raw
In response to Re: pg 8.1.2 performance issue  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: pg 8.1.2 performance issue  (Vivek Khera <vivek@khera.org>)
List pgsql-general
On Sunday March 26 2006 9:16 am, Tom Lane wrote:
> "Ed L." <pgsql@bluepolka.net> writes:
> > I see what appear to be many single transactions holding
> > RowExclusiveLocks for sometimes 40-50 seconds while their
> > query shows "<IDLE> in transaction".
> > ...
> > I'm thinking that means the client is simply tweaking a row
> > and then failing to commit the change for 40-50 seconds.  Is
> > that consistent?
>
> That's what it sounds like to me.  You might consider logging
> all commands from these clients for awhile so you can check
> that theory.

This indeed appears to be locking problem from within
Apache::Session where it deletes a row from the DB but fails to
commit the change for an extended period while another
transaction waits on the same row.  Not sure how/why that's
happening in the client code, but it's not a DB issue.

Thanks,
Ed

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