Re: (ITS#6383) Very Slow Query Response

[whm@stanford.edu]

--On Monday, November 16, 2009 07:37:49 PM -0800 Quanah Gibson-Mount <quanah@zimbra.com> wrote:

>
>
> --On November 16, 2009 8:27:21 PM +0000 whm@stanford.edu wrote:
>
>> Full_Name: Bill MacAllister
>> Version: 2.4.19+
>> OS: Debian 5
>> URL: ftp://ftp.openldap.org/incoming/
>> Submission from: (NULL) (171.64.19.165)
>>
>>
>> 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 an
>> 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

-- 
Bill MacAllister, System Software Programmer
Unix Systems Group, Stanford University