From: Alvaro Herrera <alvherre@commandprompt.com>
To: Silvio Brandani <silvio.brandani@tech.sdb.it>
Cc: pgsql-admin <pgsql-admin@postgresql.org>
Subject: Re: out of memory error
Date: Fri, 06 Aug 2010 11:43:31 -0400
Message-ID: <1281109308-sup-669@alvh.no-ip.org> (raw)
In-Reply-To: <4C5BF885.9060105@tech.sdb.it>
References: <288793.40690.qm@web39707.mail.mud.yahoo.com>
<4C5BC43B.7050503@tech.sdb.it>
<4C5BF885.9060105@tech.sdb.it>
Excerpts from Silvio Brandani's message of vie ago 06 07:56:53 -0400 2010:
> it seems the execution plan is different for this query when run from
> the application versus the psql . How can I check the execution plan of
> a query run by a user??
> I can set explain analyze for the query via psql but how can I check
> with application running the query???
If this is a prepared query, then that is a good guess. You can see the
real plan that the application is getting in psql by explaining the
execution of a prepared statement like this:
PREPARE foo(int, text) AS SELECT blah FROM foo, bar WHERE foo.id = $1 AND ...
EXPLAIN ANALYZE EXECUTE foo(someval, another);
--
Álvaro Herrera <alvherre@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
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To: pgsql-admin@postgresql.org
Cc: alvherre@commandprompt.com, silvio.brandani@tech.sdb.it
Subject: Re: out of memory error
In-Reply-To: <1281109308-sup-669@alvh.no-ip.org>
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