[Date Prev][Date Next] [Chronological] [Thread] [Top]

Re: OL2.3 vs OL2.4 perf issues

Quanah Gibson-Mount wrote:

--On July 28, 2009 10:36:08 AM -0700 Quanah Gibson-Mount
<quanah@zimbra.com>  wrote:

I've been spending some time perf testing OL 2.4 in relation to OL 2.3.
Unfortunately, RE24 is noticeably slower than 2.3 was.  Results of simple
auth testing with slamd show:

OL 2.3: 21,745 auths/second

OL 2.4: 15,733 auths/second

So OL 2.4 is 6,000 auths/second (aka 12,000 searches/second) slower than
2.3.  I.e., 27% slower.

Howard committed a patch that slightly helps some situations, and
Hallvard has a rewrite of part of the lber library that I've been testing
that he'll commit soon.  That helps somewhat:

OL 2.4 with howard and hallvard's patches: 17,086 auths/second.

That still leaves us over 4,500 auths/second (or 9000 searches/second)
slower than RE2.3. I.e., 21.5% slower.  Which is quite a substantial gap.

Here are the numbers with --enable-debug=no.

OL 2.3: 22,356 auths/second

OL 2.4: 17,396 auths/second

So for 2.3, this is an improvement of 611 auths/second.  For 2.4, this is
an improvement of 1,663 auths/second.  Which I find rather significant. ;)

OK, that lends some weight to the idea that we have too many assert()s in the 2.4 code...

  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/