Block indexes and meta blocks should be put into the LRU
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Key: HBASE-2500
URL: https://issues.apache.org/jira/browse/HBASE-2500
Project: Hadoop HBase
Issue Type: Improvement
Components: regionserver
Reporter: Jonathan Gray
Fix For: 0.20.5, 0.21.0
Currently we are not tracking the heap usage of block indexes. We're just
relying on the fact that we leave a large percentage of total heap as part of
"everything else" not in memstores or the block cache. The "everything else"
portion should be left for ephemeral/transient memory usage, not long-lived
objects like block indexes. Introduction of blooms will extend this issue to
meta blocks in general.
All of this should be moved into an LRU. Either the existing block cache LRU
or a new LRU.
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