Re: User concurrency thresholding: where do I look?

From: Gregory Stark <stark(at)enterprisedb(dot)com>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "Josh Berkus" <josh(at)agliodbs(dot)com>, "Alvaro Herrera" <alvherre(at)commandprompt(dot)com>, <pgsql-performance(at)postgresql(dot)org>
Subject: Re: User concurrency thresholding: where do I look?
Date: 2007-07-20 11:46:07
Message-ID: 871wf39u2o.fsf@oxford.xeocode.com
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"Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

> Josh Berkus <josh(at)agliodbs(dot)com> writes:
>
>> That's an interesting thought. Let me check lock counts and see if this is
>> possibly the case.
>
> AFAIK you'd get hard failures, not slowdowns, if you ran out of lock
> space entirely

I assume you've checked the server logs and are sure that you aren't in fact
getting errors. I could, for example, envision a situation where a fraction of
the transactions are getting some error and those transactions are therefore
not being counted against the txn/s result.

--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com

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