Hi!
Congrats on the MariaDB 11.8 release! So far in Debian and Ubuntu no regressions have been reported and looks everything is working well.
The most frequent thing I see people complain about is not new to
11.8, but I think introduced in 10.4 with InnoDB refusing to start if
crash recovery is needed for a database of an earlier major version.
This is explained in e.g.
https://web.archive.org/web/20240912062010/https://mariadb.com/kb/en/innodb-upgrade-after-a-crash-is-not-supported/
To help DBAs ensure they have a clean shutdown before doing a major
version upgrade, I was wondering what are the best ways to confirm a
clean shutdown by checking the MariaDB logs or files in
/var/log/mysql? Specifically, what log entries or patterns in the
MariaDB logs indicate a clean shutdown?
Additionally, are there particular files or indicators in
/var/log/mysql that reliably show the clean shutdown status? For
example, if all buffers were flushed, should I expect that some files
have size zero?
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