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From: Kevin Grittner <kgrittn@ymail.com>
To: Dave Owens <dave@teamunify.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Merlin Moncure <mmoncure@gmail.com>
Cc: Matheus de Oliveira <matioli.matheus@gmail.com>
Cc: postgres performance list <pgsql-performance@postgresql.org>
Subject: Re: query against pg_locks leads to large memory alloc
Date: Tue, 19 Aug 2014 09:40:41 -0700
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Dave Owens <dave@teamunify.com> wrote:

> 1358 tables
> 1808 indexes

Hmm, that's not outrageous.  How about long-running transactions?
Please check pg_stat_activity and pg_prepared_xacts for xact_start
or prepared (respectively) values older than a few minutes.  Since
predicate locks may need to be kept until an overlapping
transaction completes, a single long-running transaction can bloat
the lock count.

Also, could you show use the output from?:

  SELECT version();

--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


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