After upgrading from 10.6.16 to 10.6.19, a DB crashed frequently

Hi MariaDB support team,

Observation:

• no stack trace/coredump is produced for checking further
• no assertion error message appeared in mariadb-error.log
• sudden crash, no signal 6, signal 11 or other signals in mariadb-error.log
• sar CPU has spare capacity
• sar memory was enough and no swapping
• same version 10.6.19 executed for other similar systems (>300) but only 2 DBs w/ similar schema have this issue

Next action:

• suspect the problem is SQL / schema specific but could not pinpoint from binlog as failed SQLs are not captured in binlog
• plan to enable audit (initially for DMLs) to track the offending SQL(s), may extend to DDL or even queries later
• advise if there is better method to capture the offending SQL(s)

Thanks and best regards,

Lawrence