Perhaps you should increase its side then, anyway PMM is great to see what’s a good setting! :)
> Le 27 juil. 2022 à 15:31, Cédric Counotte <cedric.couno...@1check.com> a > écrit : > > Considering the binlog files are 1GB and I get 144 of them per day, doesn't > it mean that my 1GB log file holds about 10 minutes only of logs? > > I suppose I should make it 6GB then to follow that article 😉 > > Still using galera, I assume crashes are compensated by another node and 1GB > of log should be enough for now. > > FWIW Servers are using NVMe from OVH, 4 of them are on ovh gen 2 NVMe > (whatever it means). > > > -----Message d'origine----- > De : jocelyn fournier <jocelyn.fourn...@gmail.com> > Envoyé : mercredi 27 juillet 2022 15:26 > À : Gordan Bobic <gordan.bo...@gmail.com> > Cc : Cédric Counotte <cedric.couno...@1check.com>; Marko Mäkelä > <marko.mak...@mariadb.com>; Mailing-List mariadb > <maria-discuss@lists.launchpad.net>; Pierre LAFON <pierre.la...@1check.com> > Objet : Re: [Maria-discuss] MariaDB server horribly slow on start > > It’s not that tiny, this article is a bit old, but still valid: > > https://www.percona.com/blog/2008/11/21/how-to-calculate-a-good-innodb-log-file-size/ > > If you don’t need a big redo log, reduce its side to avoid slow crash recovery > > > Le 27 juil. 2022 à 15:23, Gordan Bobic <gordan.bo...@gmail.com> a écrit : > > > > 10.5+ only uses a single log file, so that is 1x1GB. > > And 1GB is tiny, IMO it should be a default these days. > > I would only even consider something smaller if I was running on an > > older Raspberry Pi or something similarly constrained. > > > > > > On Wed, Jul 27, 2022 at 4:11 PM jocelyn fournier > > <jocelyn.fourn...@gmail.com> wrote: > >> > >> Hi Cédric! > >> > >> Just to be sure, do you really need the 2x 1G log_file_size ? > >> > >> BR, > >> Jocelyn Fournier > >> > >>> Le 27 juil. 2022 à 14:36, Cédric Counotte <cedric.couno...@1check.com> a > >>> écrit : > >>> > >>> Reading this: https://jira.mariadb.org/browse/MDEV-27295 > >>> > >>> It's quite unclear when it is fixed or reverted. > >>> > >>> That said I read that the following setting might fix it: > >>> SET GLOBAL innodb_max_dirty_pages_pct_lwm=0.001; > >>> > >>> Is that correct and should I try that and see if that helps? > >>> > >>> > >>> -----Message d'origine----- > >>> De : Gordan Bobic <gordan.bo...@gmail.com> Envoyé : mercredi 27 > >>> juillet 2022 14:29 À : Marko Mäkelä <marko.mak...@mariadb.com> Cc : > >>> Cédric Counotte <cedric.couno...@1check.com>; Mailing-List mariadb > >>> <maria-discuss@lists.launchpad.net> > >>> Objet : Re: [Maria-discuss] MariaDB server horribly slow on start > >>> > >>> On Wed, Jul 27, 2022 at 3:08 PM Marko Mäkelä <marko.mak...@mariadb.com> > >>> wrote: > >>>> > >>>> On Wed, Jul 27, 2022 at 2:48 PM Gordan Bobic <gordan.bo...@gmail.com> > >>>> wrote: > >>>>> > >>>>> There is no supported downgrade path other than logical dump+restore. > >>>>> There are also no packages built for distros where the major version is > >>>>> older than what ships with the distro. > >>>>> > >>>>> Since your queries seem to end up stuck in commit stage, it could be > >>>>> related to redo log flushing, which behaves very erratically on 10.5+. > >>>>> If it leaves the log to fill up to 90% and the state transfer hits, it > >>>>> could be that with the checkpoint age already high, there just isn't > >>>>> enough headroom to avoid a massive stall. Purely guessing here without > >>>>> any telemetry. > >>>> > >>>> I think that you may refer to InnoDB page flushing. There was some > >>>> misunderstanding around that, and indeed some partly unintended or > >>>> uninformed changes in behaviour (in 10.5.7 and 10.5.8) that were > >>>> reverted later. It could be useful to read > >>>> https://jira.mariadb.org/browse/MDEV-27295. > >>> > >>> What version was it reverted in? > >>> I am still seeing the errant redo log flushing behaviour in 10.5.15. > >>> It looks like no flushing happens until the hwm is reached at about > >>> 85% full. It then tries to commit everything down to the lwm. And > >>> inbetween it doesn't do anything, even while everything is idle and > >>> it should be running down the > >>> _______________________________________________ > >>> Mailing list: https://launchpad.net/~maria-discuss > >>> Post to : maria-discuss@lists.launchpad.net > >>> Unsubscribe : https://launchpad.net/~maria-discuss > >>> More help : https://help.launchpad.net/ListHelp > >> _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp
