From: Gene <genekhart@gmail.com>
To: pgsql-jdbc@postgresql.org
To: pgsql-performance@postgresql.org
Subject: does prepareThreshold work? forced to use old driver
Date: Mon, 26 Feb 2007 11:12:53 -0500
Message-ID: <430d92a20702260812le88fb59w3ec40089db7b54dd@mail.gmail.com> (raw)
hi!
I've been having some serious performance issues with
postgresql8.2/hibernate/jdbc due to postgres reusing bad cached query
plans. It doesn't look at the parameter values and therefore does not
use any partial indexes.
After trying to set prepareThreshold=0 in the connection string which
didnt work, even modifying the jdbc driver and forcing it to 0 and not
working I realized that it must be being ignored. After giving up
pretty much I tried a much older driver which doesn't use server
prepared statements at all the problem has gone away and it is once
again using the partial indexes. How can I get this to work properly
on the new jdbc driver? I don't really like having to use a 2 year old
driver to get good performance as you can imagine :)
Could someone point me to a jdbc src file where I could just disable
server-side prepared statements entirely?
--
thanks, G
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To: pgsql-performance@postgresql.org
Cc: genekhart@gmail.com, pgsql-jdbc@postgresql.org
Subject: Re: does prepareThreshold work? forced to use old driver
In-Reply-To: <430d92a20702260812le88fb59w3ec40089db7b54dd@mail.gmail.com>
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