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Re: (ITS#6383) Very Slow Query Response
On Nov 16, 2009, at 9:03 PM, Bill MacAllister <firstname.lastname@example.org> wrote:
> --On Monday, November 16, 2009 07:37:49 PM -0800 Quanah Gibson-Mount
> <email@example.com> wrote:
>> --On November 16, 2009 8:27:21 PM +0000 firstname.lastname@example.org wrote:
>>> Full_Name: Bill MacAllister
>>> Version: 2.4.19+
>>> OS: Debian 5
>>> URL: ftp://ftp.openldap.org/incoming/
>>> Submission from: (NULL) (18.104.22.168)
>>> On a system where slapd is the top CPU process and is consuming 4%
>>> of the
>>> CPU simple queries are taking ten of seconds to complete. Here is
>>> example query:
>> Last time we saw this it appeared that it might be related to DNS.
>> How long does a netstat -a take on the affected systems when the
>> LDAP queries are slow?
> I don't have that number. I have only see it once in the test
> environment I am not sure how long it will take me to get it. Since
> this plastered the production service today, I will have to reproduce
> it though before we attempt another production upgrade.
> Not clear to me why a DNS issue would appear only under load and not
> at other times. And it seems strange that it appears in
> lenny/openldap-2.4 and not in etch/openldap-2.3.
> Bill MacAllister, System Software Programmer
> Unix Systems Group, Stanford University
For historical note this was caused by Cyrus-sasl being built
incorrectly by the debian packagers when heimdal is used.