Now the Java heap usage is above 22G against the total assigned 30G. We have to stop the indexing. Any quick way to reduce the heap occupation? I tried to disable "_all" field but found it does not work because "_all" is enabled when index is created. Any quick solution for reduce the heap occupation?
Also I found ES does not support to change the number of primary shards after index is created. Now we already have 6T data and it is huge effort to rebuild the index. Will add not help since shard number cannot be changed?