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Re: Performance degredation between 2.4.39 and 2.4.44
- To: openldap-devel@openldap.org
- Subject: Re: Performance degredation between 2.4.39 and 2.4.44
- From: Quanah Gibson-Mount <quanah@zimbra.com>
- Date: Fri, 11 Mar 2016 14:11:33 -0800
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--On Monday, February 29, 2016 2:20 PM -0800 Quanah Gibson-Mount
<quanah@zimbra.com> wrote:
--On Monday, February 29, 2016 2:11 PM -0800 Quanah Gibson-Mount
<quanah@zimbra.com> wrote:
I've noticed a bit of a performance degradation between the 2.4.39
release and 2.4.44, when doing searches that require ACL processing
(anonymous or authenticated user).
That should be, when doing searches, period. ;)
This was introduced in 2.4.44 with the fixes for ITS8266. The new
olcDbRtxnSize attribute defaults to 10000. However, the more extreme the
ratio between the batch size and the db size, the more perf is
significantly impacted. Dropping down to an approximate 300,000 DB, we see
the following.
0: 9.145s, 9.450s, 9.272s, 9.129s (no batch size)
100: 1m31.463s, 1m31.850s, 1m30.230s, 1m29.850s (3000:1)
1000: 17.910s, 17.778s, 17.784s, 17.556s (300:1)
10000: 10.067s, 9.947s, 9.919s, 9.960s (30:1)
100000: 9.437s, 9.324s, 9.272s, 9.346s (3:1)
So apparently, you want the ration to be no more than 30:1, otherwise
perfomance degrades substantially.
--Quanah
--
Quanah Gibson-Mount
Platform Architect
Zimbra, Inc.
--------------------
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