[
https://issues.apache.org/jira/browse/HBASE-2500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12861954#action_12861954
]
ryan rawson commented on HBASE-2500:
------------------------------------
Right now the block index does not have multiple sub-blocks. Even if it did,
any operation requiring the block index would have to load the entire block
index because it does a binary search. The block index is not really designed
to be usable "in-situ" like the data blocks, so something extra fancy with
callbacks when blocks are evicted might be required.
> Block indexes and meta blocks should be put into the LRU
> --------------------------------------------------------
>
> 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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
