Intermittent slowness of instance after upgradeIssue After upgrade, you may face intermittent performance issues. You may see things like a longer amount of time to open a list of records or it may load faster on subsequent attempts. It is not a consistent behavior for similar transactions. CauseIntermittent slowness on your transactions is due to high cache build time on the transactions. There are a couple of Out of Box (OOB) jobs that run every day to invalidate many tables (of Configuration Management Database, or CMDB) that are removed from the cache when the job runs. These caches are on-demand caches, and so the first transaction that tries to get the table from the cache can't find it so it fetches from the DB and then builds the cache. This needs to be done on all the nodes to build back the cache.ResolutionTo avoid this issue, you can safely have these jobs set to run every 30 days instead of every day. - The jobs "Collect Table Stats" and "Collect Table Per Hierarchy Stats" collect recordCount() from multiple tables and it should not typically matter as we can do that once every month. Please have these setup to run for 30 days and you should be relieved from the slowness on the instance.