[GE users] high CPU load for sge_qmaster

Stephan Grell - Sun Germany - SSG - Software Engineer stephan.grell at sun.com
Tue May 10 07:47:25 BST 2005


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Sean Dilda wrote:

> christian reissmann wrote:
>
>> Hi Sean, Stephan
>>
>> FYI: Your using 60u3 in CSP mode, the CSP framework was reworked for the
>> 60u4 release. May it be an option for you to switch to 60u4?
>
>
> I plan on switching to 6.0u4 at some point.  However, even if 6.0u4 
> was final today, I wouldn't be able to do the cluster-wide outage to 
> upgrade until at least mid-June.

The upgrade should be painless. Please have a look at the release notes 
when u4 is available. It isjust an exchange of the binaries.

>>
>> Shutting down the qmaster in CSP mode for 60u3 requires resyncronizing
>> between master and exec daemons. This results in several error messages
>> and can take (in the worst case) up to 7 minutes. As you see from the 
>> log
>> the execds reconnected within one minute ;-)
>>
>> This is a protocol inherent problem for 60u3 and below.
>>
>> Did all execd reconnect again? Was the master still busy for a longer 
>> time
>> afterwards?
>
>
> Yes, the execd's reconnected again.  I'm not sure what you mean by 
> 'busy for a longer time'.  The thread is still using 100% cpu usage if 
> that's what you're asking.

Would be good to know, if this still happens with u4. A lot has changed 
in the commlib.

Stephan

>
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