I have a problem with the moodle server performance refreshment, yesterday users online are 500 users, free memory usage is 57.5%. Today user online is 80 users but memory usage is free still the same. Why the memory does not refresh to less usage.
Sometimes it happen until free memory 14% for 10 user online. If i restart server will work free memory 65%.
May we ask what you are using to acquire that information? Not saying it's false info., just one might be in need of using more tools to see what is running/using resources etc. on a system. Case in point ... automated backups ... which is just an example. Or a maldetect run or a clamscan of moodledata/filedir/ Or a scan by a bot seeking the latest issues with PHPMyAdmin or even for the exsitence of php files which have been compromised in previous versions of Moodle.
If you'd share platform info (OS, etc) forum members might have some commands or even little CLI apps to help.
'SoS', Ken
