Hi all, like many of us, Moodle has become the default face of our university. We have never had as many quizzes or for that matter activities on moodle. We are trying to improve our reliability and speed. Our bottleneck seems to be our DB server - Postgres. We added 4 CPUs this Sunday morning in advance of an exam of apprx 1200 students today. At the same time as adding the CPUs we had a small local plugin update to our moodle. We cleared the moodle cache (local file cache and Redis)
Our performance today seemed quite good. We did not have a large number of idle sessions on our db server and our CPU % remained very acceptable.
My question - although counter intuitive, did clearing the cache play any part in the reliability or improvement of the performance of our quiz this morning or was that just a coincidence?
If it does play a role then how often should we try to clear cache? I would have thought that the more content which can come from cache, the faster the performance.
Thanks