Monday, 2019-09-23

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BlinkizI have a new installation of a OpenStack cluster and I think that Horizon webgui loads slowly. Chrome says "Waiting (TTFB)" is between 500ms to 1.5 sec for all pages in Horizon. It feels slow. Is this normal? How can I speed this up?07:23
obreBlinkiz: The horizon web-server performs quite a few calls to other openstack API's (nova/keystone/neutron etc), which is the main reason for the slowness of horizon. So; to speed up horizon you should make sure to tune the other API's as good as possible.07:25
obreCaching is one of the tunables you should look into. And use a benchmarking-tool while tuning to see what has an effect and what hasn't.07:26
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Blinkizobre, Hello obre. Thanks for answering my question. Do you have suggestion for some kind of profiling tool so I can measures what is making Horizon slow?08:26
BlinkizMy cluster is not used, no virtual machines are running. 9 powerful machines and Horizon is slow.08:26
BlinkizSlow slow.. I mean 500ms to 1,5 sec to show a page. That is much slower than my current platform with Proxmox which deliver pages instantly when I click on something.08:27
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fricklerBlinkiz: the first thing that comes to my mind would be to verify that you did compress static items, see https://docs.openstack.org/horizon/latest/install/from-source.html#static-assets08:31
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Blinkizfrickler, Hello Frickler. Yes, I have compressed them. I also use memcached and databaseCache08:31
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BlinkizBut I do not know if it is working or not.08:33
BlinkizI guess because horizon loads. And everything else works08:33
LarsErikPhi. just upgraded our test env from queens to rocky, but we have a major problem withe ovsdb-server on out neutron network nodes starts dropping connections after a while.. Do anyone have any expericene with that kind of behavior?08:33
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fricklerLarsErikP: are you using bionic? then you may be affected by https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/183959208:46
openstackLaunchpad bug 1839592 in openvswitch (Ubuntu) "Open vSwitch (Version 2.9.2) goes into deadlocked state" [Undecided,Confirmed]08:46
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LarsErikPfrickler: yes, using bionic09:00
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LarsErikPfrickler: I can't see that particular errors in my ovs-vswitchd logs...09:01
LarsErikPfrickler: http://paste.openstack.org/show/778854/09:02
LarsErikPthats from ovsdb-server logs09:02
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Blinkizfrickler, Hi again. You answered my question earlier today about slow speed of Horizon. What speed to you have? What is normal? Is it normal that Horizon takes 500ms to 1.5 seconds to load a page?10:32
AdamMorkHi, I have a horizon and periodically it in SLOWmo))))10:35
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AdamMorksometimes rabbitmq have many questions and  horizon sloooow10:37
BlinkizAdamMork, Hi. If you inspect (F12) Horizon, look at network tab and inspect the timing for each html page, what is your Wating (TTFB)?10:37
BlinkizYou can also lock at any "json?" request. My timing is around 755ms.10:38
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willksmBlinkiz, what page are you trying to load?10:40
AdamMorkone cecond10:40
AdamMork55-97 ms, sometimes 504 error10:42
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Blinkizwillksm, Hello. It does not really matter. It is always between 500ms to 1.5 seconds wait time. If this was beginning of decade 2000 the fine but we are now at 201910:48
BlinkizAdamMork, 55-97ms sounds more right.10:48
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willksmBlinkiz, it does matter. If you're listing all your projects then you're bound to have a high response time. If you're referring to the login page then I would expect ~50ms10:49
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Blinkizwillksm, I have a empty openstack cluster just deployed. There is no project, vms, volumes, images or anything running.10:53
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Blinkizwillksm, asking for the /login page is working without problem. There I have 70ms according to chrome. It is when logged in I have delay when loading pages. Or when trying to login which takes 970ms to continue by showing me the horizon gui10:55
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