[389-users] Lock table is out of available lock entries

Hi,

When my dirsrv was trying to compact the databases I was getting this error

[07/Aug/2021:23:59:02.715984489 +0200] - NOTICE - bdb_compact - Compacting databases ...
[07/Aug/2021:23:59:02.765932397 +0200] - NOTICE - bdb_compact - Compacting DB start: userRoot
[07/Aug/2021:23:59:03.518175414 +0200] - NOTICE - bdb_compact - compactdb: compact userRoot - 417 pages freed
[07/Aug/2021:23:59:03.576427786 +0200] - NOTICE - bdb_compact - Compacting DB start: ipaca
[07/Aug/2021:23:59:03.659941533 +0200] - NOTICE - bdb_compact - compactdb: compact ipaca - 419 pages freed
[07/Aug/2021:23:59:03.718445310 +0200] - NOTICE - bdb_compact - Compacting DB start: changelog
[08/Aug/2021:00:00:40.807571334 +0200] - NOTICE - NSMMReplicationPlugin - changelog program - cl5CompactDBs - compacting replication changelogs...
[08/Aug/2021:00:00:54.309357211 +0200] - ERR - libdb - BDB2055 Lock table is out of available lock entries
[08/Aug/2021:00:00:54.726504736 +0200] - ERR - bdb_compact - compactdb: failed to compact changelog; db error - 12 Cannot allocate memory
[08/Aug/2021:00:00:54.801571421 +0200] - ERR - libdb - BDB2055 Lock table is out of available lock entries
[08/Aug/2021:00:00:54.876618702 +0200] - ERR - NSMMReplicationPlugin - changelog program - cl5CompactDBs - Failed to compact a797bb0b-be1d11eb-88c0b677-613aa2ad; db error - 12 Cannot allocate memory
[08/Aug/2021:00:00:57.253006449 +0200] - NOTICE - bdb_compact - Compacting databases finished.

There are about 402k entries in cn=changelog.

I have a few questions
1) is it normal to have so many entries in cn=changelog? On another replica I have almost 3M entries Isn't this cleaned up?
2) the number of locks is 50000 (there are two config items). Should I increase that number? If so, increase to what?
3) is there maybe something else going on, causing the exhaustion of the locks?
--
Kees Bakker
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