We have 10 data-nodes in ES cluster. Each have the following configuration ,
- 8 GB out of 16 GB
- default indexing buffer size (10% of heap)
So far we are only doing indexing alone. No search queries are executed in
ES data-nodes. Our data-nodes heap usage crosses 5 GB, we took heap dump
In that we saw unreachable objects took nearly 3 GB (Kindly look at
attachment). The rest 2 GB is occupied by RobinEngine instances which is
acceptable due to BloomFilter used for primary key look up. My question are
- Though we set mmap as store type what actually occupies in that 3 GB ?
among 3GB, byte took 750 MB what will we stored in byte ?
- Whether mmap will used while segments merges ?
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