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https://issues.apache.org/jira/browse/HBASE-2087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12795715#action_12795715
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Jean-Daniel Cryans commented on HBASE-2087:
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So either we have too much WALs or too much store files right? Like I said in
HBASE-2053, our WAL is set very small so that master splits fast and we don't
lose data. In 0.21 we won't lose data so speeding up the spit time then set a
higher/bigger WAL would solve this problem?
> The wait on compaction because "Too many store files" holds up all flushing
> ---------------------------------------------------------------------------
>
> Key: HBASE-2087
> URL: https://issues.apache.org/jira/browse/HBASE-2087
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
>
> The method MemStoreFlusher#checkStoreFileCount is called from flushRegion.
> flushRegion is called by MemStoreFlusher#run thread. If the
> checkStoreFileCount finds too many store files, it'll stick around waiting on
> a compaction to happen. While its hanging, the MemStoreFlusher#run is held
> up. No other region can flush. Meantime WALs will be rolling and memory
> will be accumulating writes.
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