Enis Soztutar created HBASE-15950:
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Summary: We are grossly overestimating the memstore size
Key: HBASE-15950
URL: https://issues.apache.org/jira/browse/HBASE-15950
Project: HBase
Issue Type: Bug
Reporter: Enis Soztutar
Fix For: 2.0.0
While testing something else, I was loading a region with a lot of data.
Writing 30M cells in 1M rows, with 1 byte values.
The memstore size turned out to be estimated as 4.5GB, while with the JFR
profiling I can see that we are using 2.8GB for all the objects in the memstore
(KV + KV byte[] + CSLM.Node + CSLM.Index).
This obviously means that there is room in the write cache that we are not
effectively using.
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