OpenLDAP taker a long time (90s+) to shutdown

Hello,

I run into a issue where OpenLDAP would not shutdown within 90s. Sometimes shutdown is fast and sometimes not. This concern production server getting a fair amount of traffic.

The reason I am mentioning 90s is because this is the default timeout for sytemd service. After that time it sends SIGKILL to the process.

I am running latest OpenLDAP (2.45) with MDB database (~1GB). The server is a consumer of another OpenLDAP Server. Maybe more importantly following directive are present under the MDB database configuration.

dbnosync checkpoint 500 5

I was wondering what is the expected time for OpenLDAP to shutdown. Also I am unsure if the checkpoiont setting could be related.

Best,

Alex