Hi everyone,
I’m using a btrfs filesystem on my computer, and when starting the xwiki-platform-distribution-flavor-jetty-hsqldb packaged instance, I notice a significant amount of writes to the disk. (which can wear out SSDs)
It seems like these writes are made to the database. And from recommendations I saw related to other databases like mariadb, I disabled copy-on-write for the directory before unpacking the zip file.
If the database (in
/var/lib/mysql) resides on a Btrfs file system, you should consider disabling Copy-on-Write for the directory before creating any database.
And that indeed significantly reduced the amount of writes to the disk when starting or using the XWiki instance.
I don’t know how many XWiki users are running an instance over btrfs, but I think it would be nice to either have:
- A warning somewhere in the documentation to make people aware that they should disable copy-on-write for XWiki if using btrfs or use another filesystem if they care about performance/wear
- The extended attribute
C(capital C, c.f.man chattr) set in the packaged archive. Although ZIP doesn’t support extended attributes so that would also mean switching to another archiving format
WDYT?
Thanks.