to clean the “Activity Table” which can get really huge, the easiest option is to use phpmyadmin.
choose the database
choose the table
OKM_ACTIVITY and execute the following sql query:
DELETE FROM OKM_ACTIVITY WHERE ACT_DATE < '2020-09-05 09:30:04'; ANALYZE TABLE OKM_ACTIVITY;
Wait patiently until the database query finishes – that can take up to 30 minutes, depending on your setup.