Monday, 2016-01-25

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gfamnaser: http://lists.openstack.org/pipermail/openstack-dev/2016-January/084579.html AFAIR keystonemiddleware is used by nova-compute (and everything else)01:18
gfai'm booting a liberty cloud to check, may take a while01:19
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openstackgerritPeter Jenkins proposed openstack/osops-tools-generic: Update aut-fix-quota tool for Juno  https://review.openstack.org/26687306:26
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mnasergfa: why cant you point to a single memcache installation on the controller?  it's what we've always done15:55
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openstackgerritMerged openstack/osops-tools-generic: Update aut-fix-quota tool for Juno  https://review.openstack.org/26687316:11
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mgagnemfisch I tried to profile token validation with fernet. it's interesting17:45
mfischits certainly slower, what did you find?17:45
mgagnemfisch we are testing with artificial database latency. we expect 100ms so I tested with 1s.17:45
mfischalthough they said they have a bunch of speedups in L and M that I've not tried yet17:45
mgagnemfisch about 75 SQL queries17:45
mgagnemfisch with 1s latency each of course17:45
mfischoh thats not good17:46
mgagnemfisch and close to half serve no purpose at all17:46
mfischwhich release?17:46
mgagnemfisch kilo17:46
mgagnemfisch with a couple of cache patches17:47
mfischfor L I know they added some caching...17:47
mfischhmm17:47
mfischso that doesnt solve what you saw17:47
mgagnemfisch once everything is cached, there is 0 query17:47
mfischthe keystone guys would love to know that17:47
mfischdo you know Lance and Dolph?17:47
mgagnemfisch not personally, just reading blogs and patches from them =)17:47
mfischare you going to file a bug? If so I will be sure they see it17:48
mgagnemfisch https://gist.github.com/mgagne/a80ee892ed099d0bc4ef17:48
mfischthis is all the queries?17:51
mfischwhy select 1?17:51
mgagnemfisch yes, used ngrep17:51
mgagnemfisch with dedicated keystone node for debug purpose17:51
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mfischwhy would someone do a Select 1 in code?17:53
mgagnemfisch SELECT 1 is probably to detect if connection is still alive, I don't know. I profiled it last Thursday at 2am, wrote my email, left the office and went on vacation :P17:53
mfischah17:53
mgagnemfisch probably done by sqlalchemy17:53
mfischthat makes sense17:53
mgagnemfisch or maybe oslo_db which I doubt tbh17:53
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mfischsqlalchemy would make sense17:54
mfischmgagne: which of these do you think are not useful?17:54
mgagnemfisch everything that isn't a complex SELECT? :D17:54
mgagne13x "SELECT 1", 13x "rollback", 3x "commit"17:55
mgagne29 requests17:55
mfischyou mean they should combine some selects17:55
mfischor a majority of them17:55
mgagnemfisch maybe not merge them but those SELECT 1 costs 1 second in my scenario17:56
mgagnemfisch http://docs.sqlalchemy.org/en/latest/core/pooling.html17:56
mfischyou put a sleep1 after each mysql call?17:56
mfischwe use pooling17:57
mfischfor ldap anwyay17:57
mgagnemfisch SELECT 1 looks to come from a ping17:57
mgagnemfisch using tc17:57
mfischI wonder if we should discuss in the keystone channel17:57
mgagnemfisch I just arrived at the office 10m ago and have yet to continue my profiling and now I have an unexpected meeting :-/17:58
mfischmy favorites17:58
mfischlets discuss more later17:58
mfischI have a call now too17:58
mgagnemfisch ok, managed to get out of the meeting17:59
mfischI didnt17:59
mgagnehaha17:59
mfischwill back in about 2 hours17:59
mfischmeeting then lunch17:59
mgagnealright, will continue on my side18:00
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mgagnemfisch https://github.com/openstack/oslo.db/blob/master/oslo_db/sqlalchemy/engines.py#L53-L8218:14
mgagnemfisch the behavior is hardcoded in oslo_db based on pessimistic recommendations from sqlalchemy http://docs.sqlalchemy.org/en/latest/core/pooling.html#disconnect-handling-pessimistic18:16
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stevemarmfisch: mgagne i can confirm that keystone guys like to know things18:31
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mgagnestevemar should I come over to #openstack-keystone?18:32
stevemarmgagne: whenever you're ready, i haven't read all the scroll back18:32
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mgagnestevemar who should I ping?18:33
stevemarmgagne: sounds like a pretty bad issue, you can ping dolphm or lbragstad18:33
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openstackgerritVIncent S. Cojot proposed openstack/osops-tools-monitoring:     fix for changes in the output of ceph 1.3+ 'df' command.  https://review.openstack.org/27224819:59
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openstackgerritVIncent S. Cojot proposed openstack/osops-tools-monitoring: fix for changes in the output of ceph 1.3+ 'df' command.  https://review.openstack.org/27224820:39
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openstackgerritVIncent S. Cojot proposed openstack/osops-tools-monitoring: fix for changes in the output of ceph 1.3+ 'df' command.  https://review.openstack.org/27224820:42
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