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Message #18354
[Bug 1293794] Re: memcached_servers timeout causes poor API response time
Action items: add new option which configures socket_timeout for python-
memcached
** Also affects: oslo
Importance: Undecided
Status: New
** Changed in: oslo
Status: New => Confirmed
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1293794
Title:
memcached_servers timeout causes poor API response time
Status in OpenStack Compute (Nova):
Invalid
Status in Oslo - a Library of Common OpenStack Code:
Confirmed
Bug description:
In nova.conf, when configured for HA by setting the memcached_servers
parameter to several memcached servers in the nova API cluster, e.g.:
memcached_servers=192.168.50.11:11211,192.168.50.12:11211,192.168.50.13:11211
If there are memcached servers on this list that are down, the time it
takes to complete Nova API requests increases from < 1 second to 3-6
seconds.
It seems to me that Nova should protect itself from such performance
degradation in an HA scenario.
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References