Hi,

Currently the mailman3 cgroup slice uses up to 875MB:

Control Group Tasks %CPU Memory Input/s Output/s system.slice/mailman3.service 16 0.1 875.3M - -

Is 875MB a normal expected amount, or more than expected?

To confirm that this is truly used and not "cached", I use the new Available column from the "free -m" output, which is the pre-computed available memory for a new process, added in recent years.

The output of free -m under the Available column when mailman3 is running is : 161 MB

When I stop the mailman service, the output of free -m Available column goes up to: 1071 MB

Showing that the 875MB previously were not available for release for new processes.

If I start mailman service again, the output of free -m Available column goes back to : 325MB and will be reducing gradually over time.

I looked around on posts, documentation and others, but didn't find guides related to reducing RAM usage, is that a possibility or is this memory usage expected?