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  • Latest Post - ‏2013-02-20T15:47:21Z by mipi
mipi
mipi
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Pinned topic Video Analyze SVC Volume performance issue (7 min)

‏2013-02-20T15:19:48Z |
This is from a customer situation

in the week from September 17, 2012 severe performance issues have been detected on several hosts in the VMware Farm.
A first analysis showed that one of the responsible discs has been ESX_D37.
The problem was especially high on Monday from 10 AM to 1 PM.

We want to analyze the situation on Monday to find out with the problem was coming from

This Analysis will cover the following

look into the performance of a volume - very simple - only volume IOPS and volume response times but good enough for this purpose
analyze managed disk group cache behavior - the mdg cache is total overfilled - we see extrem high cache page destage operations
volume analysis of all volumes in the managed disk group to find which volumes are responsible to fill up the cache
additionally with a look into the cache usage of these volumes
conclusion

You find this Video here:
http://bvqwiki.sva.de/x/s4E6
Updated on 2013-02-20T15:47:21Z at 2013-02-20T15:47:21Z by mipi