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32 bit to 64 bit migration performance problems

To: openldap-software@openldap.org
Subject: 32 bit to 64 bit migration performance problems
From: erin crego <ecav22@yahoo.com>
Date: Thu, 21 Jun 2007 08:55:34 -0700 (PDT)

I am moving our ldap instances to new servers; the old servers are 32 bit, the new ones are 64 bit. I have compiled the same versions of bdb (4.2.52) and openldap (2.2.26) with the same flags on the new servers. After running DirectoryMark tests, I have found the operations per second has gone down 33% - from 299 on the old servers to 192 on the new ones.
I have tried adding what I think are the 64 bit flags to the compilation of bdb and openldap. LDFLAGS='-m64' and CFLAGS='-m64'
This has resulted in the operations/second going down further to 52.

Are there different compilation flags I should use for 64 bit systems? Or, is the performance change of -33% to be expected when moving from 32 bit to 64 bit?

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Follow-Ups:
- Re: 32 bit to 64 bit migration performance problems
  - From: Quanah Gibson-Mount <quanah@zimbra.com>

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