Hi I'm having a problem after upgrading Cassandra 3.0.14 to 3.11.1.
When running a repair the node I'm issuing the repair starts to use use all
available memory and then the GC grinds it to death. I'm seeing with
nodetool compactionstats that there is a lot of (> 100) active concurrent
compaction jobs typed 'Validation'.
I'm running the repair with `nodetool repair -pr -seq keyspace table`
Cassandra has 18G max heap memory, but that doesn't seem to be even close
With visualvm I can see that big portion of the live heap is used on the