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gfa | mnaser: http://lists.openstack.org/pipermail/openstack-dev/2016-January/084579.html AFAIR keystonemiddleware is used by nova-compute (and everything else) | 01:18 |
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gfa | i'm booting a liberty cloud to check, may take a while | 01:19 |
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openstackgerrit | Peter Jenkins proposed openstack/osops-tools-generic: Update aut-fix-quota tool for Juno https://review.openstack.org/266873 | 06:26 |
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mnaser | gfa: why cant you point to a single memcache installation on the controller? it's what we've always done | 15:55 |
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openstackgerrit | Merged openstack/osops-tools-generic: Update aut-fix-quota tool for Juno https://review.openstack.org/266873 | 16:11 |
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mgagne | mfisch I tried to profile token validation with fernet. it's interesting | 17:45 |
mfisch | its certainly slower, what did you find? | 17:45 |
mgagne | mfisch we are testing with artificial database latency. we expect 100ms so I tested with 1s. | 17:45 |
mfisch | although they said they have a bunch of speedups in L and M that I've not tried yet | 17:45 |
mgagne | mfisch about 75 SQL queries | 17:45 |
mgagne | mfisch with 1s latency each of course | 17:45 |
mfisch | oh thats not good | 17:46 |
mgagne | mfisch and close to half serve no purpose at all | 17:46 |
mfisch | which release? | 17:46 |
mgagne | mfisch kilo | 17:46 |
mgagne | mfisch with a couple of cache patches | 17:47 |
mfisch | for L I know they added some caching... | 17:47 |
mfisch | hmm | 17:47 |
mfisch | so that doesnt solve what you saw | 17:47 |
mgagne | mfisch once everything is cached, there is 0 query | 17:47 |
mfisch | the keystone guys would love to know that | 17:47 |
mfisch | do you know Lance and Dolph? | 17:47 |
mgagne | mfisch not personally, just reading blogs and patches from them =) | 17:47 |
mfisch | are you going to file a bug? If so I will be sure they see it | 17:48 |
mgagne | mfisch https://gist.github.com/mgagne/a80ee892ed099d0bc4ef | 17:48 |
mfisch | this is all the queries? | 17:51 |
mfisch | why select 1? | 17:51 |
mgagne | mfisch yes, used ngrep | 17:51 |
mgagne | mfisch with dedicated keystone node for debug purpose | 17:51 |
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mfisch | why would someone do a Select 1 in code? | 17:53 |
mgagne | mfisch 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 :P | 17:53 |
mfisch | ah | 17:53 |
mgagne | mfisch probably done by sqlalchemy | 17:53 |
mfisch | that makes sense | 17:53 |
mgagne | mfisch or maybe oslo_db which I doubt tbh | 17:53 |
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mfisch | sqlalchemy would make sense | 17:54 |
mfisch | mgagne: which of these do you think are not useful? | 17:54 |
mgagne | mfisch everything that isn't a complex SELECT? :D | 17:54 |
mgagne | 13x "SELECT 1", 13x "rollback", 3x "commit" | 17:55 |
mgagne | 29 requests | 17:55 |
mfisch | you mean they should combine some selects | 17:55 |
mfisch | or a majority of them | 17:55 |
mgagne | mfisch maybe not merge them but those SELECT 1 costs 1 second in my scenario | 17:56 |
mgagne | mfisch http://docs.sqlalchemy.org/en/latest/core/pooling.html | 17:56 |
mfisch | you put a sleep1 after each mysql call? | 17:56 |
mfisch | we use pooling | 17:57 |
mfisch | for ldap anwyay | 17:57 |
mgagne | mfisch SELECT 1 looks to come from a ping | 17:57 |
mgagne | mfisch using tc | 17:57 |
mfisch | I wonder if we should discuss in the keystone channel | 17:57 |
mgagne | mfisch I just arrived at the office 10m ago and have yet to continue my profiling and now I have an unexpected meeting :-/ | 17:58 |
mfisch | my favorites | 17:58 |
mfisch | lets discuss more later | 17:58 |
mfisch | I have a call now too | 17:58 |
mgagne | mfisch ok, managed to get out of the meeting | 17:59 |
mfisch | I didnt | 17:59 |
mgagne | haha | 17:59 |
mfisch | will back in about 2 hours | 17:59 |
mfisch | meeting then lunch | 17:59 |
mgagne | alright, will continue on my side | 18:00 |
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mgagne | mfisch https://github.com/openstack/oslo.db/blob/master/oslo_db/sqlalchemy/engines.py#L53-L82 | 18:14 |
mgagne | mfisch the behavior is hardcoded in oslo_db based on pessimistic recommendations from sqlalchemy http://docs.sqlalchemy.org/en/latest/core/pooling.html#disconnect-handling-pessimistic | 18:16 |
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stevemar | mfisch: mgagne i can confirm that keystone guys like to know things | 18:31 |
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mgagne | stevemar should I come over to #openstack-keystone? | 18:32 |
stevemar | mgagne: whenever you're ready, i haven't read all the scroll back | 18:32 |
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mgagne | stevemar who should I ping? | 18:33 |
stevemar | mgagne: sounds like a pretty bad issue, you can ping dolphm or lbragstad | 18:33 |
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openstackgerrit | VIncent S. Cojot proposed openstack/osops-tools-monitoring: fix for changes in the output of ceph 1.3+ 'df' command. https://review.openstack.org/272248 | 19:59 |
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openstackgerrit | VIncent S. Cojot proposed openstack/osops-tools-monitoring: fix for changes in the output of ceph 1.3+ 'df' command. https://review.openstack.org/272248 | 20:39 |
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openstackgerrit | VIncent S. Cojot proposed openstack/osops-tools-monitoring: fix for changes in the output of ceph 1.3+ 'df' command. https://review.openstack.org/272248 | 20:42 |
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