> If you are seeing 600 pending compaction tasks regularly you almost > definitely need more hardware.
Note that pending compactions is pretty misleading and you can't really draw conclusions just based on the pending compactions number/graph. For example, standard behavior during e.g.a long repair may end up accumulating thousands of pending compactions that suddenly drop to zero once you're done and a bunch of tasks that don't actually need to do anything are "completed". With the concurrent compaction support I suppose this will be mitigated as long as you don't hit your concurrency limit. -- / Peter Schuller
