[MDEV-26968] Galera cluster gcache.page files creation at startup/restart (regression of MDEV-19084) Created: 2021-11-03  Updated: 2021-12-17  Resolved: 2021-12-17

Status: Closed
Project: MariaDB Server
Component/s: Galera, Server
Affects Version/s: 10.4.21
Fix Version/s: 10.4.22

Type: Bug Priority: Critical
Reporter: Mark Reibert Assignee: Jan Lindström (Inactive)
Resolution: Fixed Votes: 0
Labels: None
Environment:

Ubuntu 20.04

Issue Links:
Relates
relates to MDEV-19084 Galera cluster gcache.page files crea... Closed
relates to MDEV-23060 Mariadb 10.4.12 gcache is created aft... Open

 Description   

Intermittently upon start/restart, the server begins creating gcache.page.XXXXX files instead of using the configured gcache. Because (by default) the gcache.page.XXXXX files are small this creates all kinds of issues with IST as described in MDEV-19084.

Note this was originally reported in MDEV-19084 and believed to be fixed in MariaDB 10.4.14 (Galera 26.4.5). I have recently upgraded to 10.4.21 (Galera 26.4.9) and the problem is back. So it appears we have a regression.

See MDEV-19084 for further details.

 Comments   
Comment by Mark Reibert [ 2021-11-22 ]

It is worth noting I have seen this issue only once on MariaDB 10.4.21, so the problem is perhaps rare. Moreover, I have since upgraded to MariaDB 10.4.22 and have not observed the gcache.page.XXXXX files with that release.

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