We are migrating from OpenLDAP 2.4.44 which had HDB as a database to OpenLDAP 2.6.3 which now has MDB as a database.
In older version to cleanup DB logs we used olcDbConfig attribute with value "set_flags DB_LOG_AUTOREMOVE" for dn="olcDatabase={2}hdb,cn=config", but in newer version this attribute seems to be not valid.
My question is: How log autoremoval implemented in 2.6.3 version of OpenLDAP? How it is configured?
There is no log autoremoval because there are no logs.
LMDB is not a variant of Berkeley DB like hdb was; it's a new database with a completely different architecture, and it has been designed to not require a transaction log or a WAL. If you look in your database directory, you won't find any files that need to be removed.