| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Barry Lind" <blind(at)xythos(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org, pgsql-jdbc(at)postgresql(dot)org |
| Subject: | Re: Performance problem using V3 protocol in jdbc driver |
| Date: | 2005-08-17 05:01:45 |
| Message-ID: | 12037.1124254905@sss.pgh.pa.us |
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| Lists: | pgsql-jdbc pgsql-performance |
"Barry Lind" <blind(at)xythos(dot)com> writes:
> ... On a hunch I switched the jdbc driver to using the V2 protocol
> and the load on the machine dropped down to what it was when using
> Oracle and everything was fine.
First knee-jerk reaction is that it's an optimization problem stemming
from V3 protocol feeding parameterized queries to the backend where V2
did not, and the planner being unable to cope :-(
Can you identify the specific queries causing the problem?
regards, tom lane
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