Very intrusive.

Off hours - if you have a lot of users, the performance will cripple
while cache rebuilds. Our average CPU comsumption goes from 20% to
70-80% during rebuild of cache.
We take server off load balancer until server has completed rebuild of
cache.

Regards,
 
Andrew Goodall
Software Engineer 2 | Development Services |  jcpenney . www.jcp.com  

-----Original Message-----
From: Action Request System discussion list(ARSList)
[mailto:[email protected]] On Behalf Of David Durling
Sent: Monday, March 26, 2012 2:48 PM
To: [email protected]
Subject: Effects of flushing midtier cache

Hi,

I'm one of those that has found it necessary to use the "flush cache"
button in the mid tier config when sometimes certain changes aren't
picked up at the regular cache check interval.

Do you all consider a flush of the mid tier cache to be unintrusive -
something that can be done during production hours?  Or is it something
that should be done off-hours?

On our server I don't notice performance issues in using it, and in what
little testing I've done, user sessions seem to be uninterrupted.  (I'm
not sure about floating users on the web, though - if there's anything
to consider there.)

I'm on ARS 7.5 patch 007 with mid tier 7.5 patch 007 with apache/tomcat.

Thanks,

David

---
David Durling                  [email protected]
Enterprise IT Services
University of Georgia

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