Re: HAProxy - Server Timeout and Client Timeout
Hi, On Tue, Jun 05, Martel, Michael H. wrote: > We're running HAproxy 1.5.18 on RedHat Enterprise 7.4, as the load balancer > for our LMS (Moodle). We have found that the course backup feature in Moodle > will return a 5xx error on some backups. We have determined that the > "timeout server" value needed to be increased. Do these backup requests have specific urls that you can match with acl ? If you use separate backend for moodle backups then it should be possible to increase timeout server for just the backup requests. Something like frontend fe_moodle acl backup_req path_sub /something/backup use_backend moodle_backup if backup_req default_backend moodle ... backend moodle timeout server 1m ... backend moodle_backup timeout server 12m server moodle1 ... track moodle/moodle1 ... server moodle2 ... track moodle/moodle2 ... > Initially we were using a "timeout client 1m" and "timeout server 1m" . > Adjusting the server to "timeout server 12m" fixes the problem and does not > appear to introduce any other issues in our testing. > > I can't see any reason that I should have the "timeout client" and the > "timeout server" set to the same value. > > Is there anything I should watch out for after increasing the "timeout > server" by such a large amount ? Probably not, but AFAIK if the backend server "dies" after haproxy has forwarded the request (and before server responds) then client has to wait for timeout server (in reality I think everyone will just click stop or reload instead of waiting for the really long timeout). -Jarno -- Jarno Huuskonen
Re: HAProxy - Server Timeout and Client Timeout
HI Michael We often see the client/server timeouts requiring to be raised as you have found, A good default value for client/server timeouts are below and I include the connect timeout too in milliseconds timeout connect 4000 timeout client 42000 timeout server 43000 Say for example you run a long report on a website, maybe it will take 5 or 10 min's to complete so you would raise the server timeout to match the required maximum timeout where possible allowing for the report to run and the server, not timeout. I hope this helps Andruw Smalley Loadbalancer.org Ltd. www.loadbalancer.org +1 888 867 9504 / +44 (0)330 380 1064 asmal...@loadbalancer.org Leave a Review | Deployment Guides | Blog On 5 June 2018 at 20:11, Martel, Michael H. wrote: > Greetings! > > We're running HAproxy 1.5.18 on RedHat Enterprise 7.4, as the load balancer > for our LMS (Moodle). We have found that the course backup feature in Moodle > will return a 5xx error on some backups. We have determined that the > "timeout server" value needed to be increased. > > Initially we were using a "timeout client 1m" and "timeout server 1m" . > Adjusting the server to "timeout server 12m" fixes the problem and does not > appear to introduce any other issues in our testing. > > I can't see any reason that I should have the "timeout client" and the > "timeout server" set to the same value. > > Is there anything I should watch out for after increasing the "timeout > server" by such a large amount ? > > Thanks! > > > > Michael > > -- > > o- >Michael H. Martel | Director of Data Center Administration >michael.mar...@vsc.edu | Systems and Security Administrator >Vermont State Colleges | PH:802-224-3010 FX:802-224-3035 > >
HAProxy - Server Timeout and Client Timeout
Greetings! We're running HAproxy 1.5.18 on RedHat Enterprise 7.4, as the load balancer for our LMS (Moodle). We have found that the course backup feature in Moodle will return a 5xx error on some backups. We have determined that the "timeout server" value needed to be increased. Initially we were using a "timeout client 1m" and "timeout server 1m" . Adjusting the server to "timeout server 12m" fixes the problem and does not appear to introduce any other issues in our testing. I can't see any reason that I should have the "timeout client" and the "timeout server" set to the same value. Is there anything I should watch out for after increasing the "timeout server" by such a large amount ? Thanks! Michael -- o- Michael H. Martel | Director of Data Center Administration michael.mar...@vsc.edu | Systems and Security Administrator Vermont State Colleges | PH:802-224-3010 FX:802-224-3035
