tl;dr: If you’re using the CMS collector in Java 6 (-XX:+UseConcMarkSweepGC) server-side, then you should really consider -XX:+CMSClassUnloadingEnabled Today’s post starts out with a story. You might have heard a similar story before. It begins with a handful of servers in a datacenter that just…. pause sometimes. There doesn’t seem to be any rhyme or… Read More