ramkrishna.s.vasudevan created HBASE-15203:
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Summary: Reduce garbage created by path.toString() during Checksum
verification
Key: HBASE-15203
URL: https://issues.apache.org/jira/browse/HBASE-15203
Project: HBase
Issue Type: Sub-task
Reporter: ramkrishna.s.vasudevan
Assignee: ramkrishna.s.vasudevan
Priority: Minor
Fix For: 2.0.0
When we try to read a block we do checksum verification for which we need the
file name in which the block belongs to. So we do Path.toString() every time.
This seems to create around 163MB of char[] that is garbage collected in a
simple scan run. It is also visible in writes but the impact is lesser. In
overall write/read profile the top 2 factors are byte[] and char[]. This
toString() can easily be avoided and reduce its share from the total.
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