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Re: FUNC_MAX_ARGS benchmarks

Joe Conway <mail@joeconway.com>

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From: Joe Conway <mail@joeconway.com>
To: Peter Eisentraut <peter_e@gmx.net>
Cc: Bruce Momjian <pgman@candle.pha.pa.us>, Tom Lane <tgl@sss.pgh.pa.us>, Thomas Lockhart <lockhart@fourpalms.org>, Neil Conway <nconway@klamath.dyndns.org>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2002-08-06T21:25:40Z
Lists: pgsql-hackers

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Peter Eisentraut wrote:
> Joe Conway writes:
>>Here's the multi-user test summary. Very little difference. The details
>>of the OSDB output are attached.
> 
> The fact that the OSDB benchmark has just about the least possible test
> coverage of identifier handling and you still get a 2% performance drop is
> something I'm concerned about.
> 

Of course that's on the single user test only. In the multi-user test 
the two are neck-and-neck. If you really want to be concerned, see the 
attached. This lines up results from:

REL7_2_STABLE with NAMEDATALEN = 32 and FUNC_MAX_ARGS = 16
7.3devel      with NAMEDATALEN = 32 and FUNC_MAX_ARGS = 32
7.3devel      with NAMEDATALEN = 128 and FUNC_MAX_ARGS = 32

In the single-user test, REL7_2_STABLE is best by about 10%. But in the 
multi-user test (10 users), *both* 7.3devel tests are about 3.5% faster 
than 7.2.

Joe