27 Oct
2022
27 Oct
'22
11:18 p.m.
Datum a čas: 2022-10-28 01:17 CEST
Očekavaná délka: 180 minut
Oznámení se týká serverů: node1.stg
Typ výpadku: vps_restart
Důvod: Debugovani problemu se starsi mysql
Výpadek řeší: Pavel Šnajdr
ENGLISH:
Date and time: 2022-10-28 01:17 CEST
Expected duration: 180 minutes
Affected systems: node1.stg
Outage type: vps_restart
Reason: Debugging older mysql issues
Handled by: Pavel Šnajdr
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28 Oct
28 Oct
9:23 a.m.
Popis: Další restarty
Hledáme regresi, která způsobuje pád starších mysqld, zatím bez úspěchu. Neumíme to
reprodukovat lokálně, takže možná budeme node1.stg restartovat vícekrát.
Nahlásil: Jakub Skokan
ENGLISH:
Summary: More reboots for debugging
We're trying to find a regression which causes older mysqld to crash, so far without
any luck. We cannot reproduce locally, so we might be rebooting node1.stg repeatedly.
Reported by: Jakub Skokan
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8:20 p.m.
Stav: -> closed
Popis: Podařilo se
Po dvou dnech zkoušení různých kombinací kernelu/ZFS jsme přišli na to, že změna, která
způsobuje pády mysqld na Ubuntu 18.04 je jednoduše navýšení sysctl fs.nr_open. Více info
viz
https://github.com/vpsfreecz/vpsadminos/commit/abf1322382bc3c37bc920326031c…
https://im.vpsfree.cz/archive/irc.libera.chat/#vpsfree/2022/10/28.html#l49
Nahlásil: Jakub Skokan
ENGLISH:
State: -> closed
Summary: Success
After almost two days of trying different kernel/ZFS combinations, we found out that the
change which caused mysqld on Ubuntu 18.04 to crash was simply increased fs.nr_open
sysctl. For more information, see
https://github.com/vpsfreecz/vpsadminos/commit/abf1322382bc3c37bc920326031c…
https://im.vpsfree.cz/archive/irc.libera.chat/#vpsfree/2022/10/28.html#l49
Reported by: Jakub Skokan
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