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Re: thread pools, performance

To: Howard Chu <hyc@symas.com>
Subject: Re: thread pools, performance
From: Hallvard B Furuseth <h.b.furuseth@usit.uio.no>
Date: Thu, 1 Nov 2007 00:11:53 +0100
Cc: OpenLDAP-devel@openldap.org
In-reply-to: <4728FC95.9070608@symas.com>
References: <4718321A.60207@symas.com> <4719E4D6.1090307@symas.com> <471AD1F3.4060407@boreham.org> <471AF4CF.3000308@symas.com> <471CD358.4020802@hp.com> <4721A81C.7090709@symas.com> <47233031.1050802@symas.com> <4728FC95.9070608@symas.com>

Howard Chu writes:
> Ultimately after several more repeated runs, AD peaked at 4800
> auths/sec (a bit faster than the 4400 we saw before, apparently it
> took a while for their caches to get fully primed). We then removed AD
> and installed ADAM. The import went a bit faster this time,
> thankfully: (...)

Are you collecting more info than the average time, e.g. standard
deviation?  Are there occasional requests that take very much longer
time than the average, or even auth failures because the server is too
busy?  At those speeds, that can be as important or more important than
the average time.

-- 
Regards,
Hallvard

References:
- ITS#4943 tpool.c, thread pools
  - From: Howard Chu <hyc@symas.com>
- Re: thread pools, performance
  - From: Howard Chu <hyc@symas.com>
- Re: thread pools, performance
  - From: David Boreham <david_list@boreham.org>
- Re: thread pools, performance
  - From: Howard Chu <hyc@symas.com>
- Re: thread pools, performance
  - From: Howard Chu <hyc@symas.com>
- Re: thread pools, performance
  - From: Howard Chu <hyc@symas.com>
- Re: thread pools, performance
  - From: Howard Chu <hyc@symas.com>

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