I tried it and it didn’t help. There are now about 2.5 million rows in that table. There could be something wrong with the hosting, as you say, but other cron jobs on the site are running okay, so that doesn’t sound likely. Is it possible that the AdRotate plugin doesn’t have rights to delete the data from the database it’s trying to delete? The job is running every hour but not deleting the rows like it’s supposed to. Even running the job manually using a cron management plugin does not delete the data. So something else seems to be wrong. Do you have any other suggestions?