Vladimir Rodionov created HBASE-9751:
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Summary: Excessive readpoints checks in MemStoreScanner and
StoreFileScanner
Key: HBASE-9751
URL: https://issues.apache.org/jira/browse/HBASE-9751
Project: HBase
Issue Type: Bug
Affects Versions: 0.94.12, 0.98.0, 0.96.0
Reporter: Vladimir Rodionov
It seems that usage of skipKVsNewerThanReadpoint in StoreFileScanner can be
greatly reduced or even eliminated all together (HFiles are immutable and no
new KVs can be inserted after scanner instance is created). The same is true
for MemStoreScanner which checks readpoint on every next() and seek(). Each
readpoint check is ThreadLocal.get() and it is quite expensive.
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