Frequent full GC even if the memory utilization is 30-40%. We have not changed the default JVM settings
Cluster details -
a. One master node, 2 data nodes(15 GB Heap size)
b. All the replicas are allocated on one node and all the primaries are on the other node. It should not be a problem, right? Also frequent full GC is observed on one of the 2 data nodes.
c. Shards - 75 shards with replication as 1. I guess the problem is because of shard over allocation. Most of the queries we hit are aggregation queries.
d. mlockall is set to true