Big increase in memcached CPU usage after Dec 14 Microsoft patches
After applying the patches released by Microsoft on Dec 14 2010 we have seen a big increase in the CPU usage of memcached. We used to see virtually no CPU usage from memcached, but are now seeing it pegged on ~6% on each cluster node, and if the number of ops/sec rises we see the CPU usage rise in proportion. We were able to determine with a high degree of confidence that the increase in CPU usage correlated with the installation of the Microsoft patches and not with some other configuation change.
We are running Membase 1.6.0 in a 2-node cluster on Windows 2008 64-bit. There are no firewalls between the nodes. We don't see moxi or erl.exe use any CPU -- only memcached.exe displays unexpected behavior.
The patches we installed were:
Does anybody else have good or bad experiences with the latest batch of patches from Micrsoft or any insight into what could be going on?