ramkrishna.s.vasudevan created HBASE-15202:
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Summary: Reduce garbage while setting response
Key: HBASE-15202
URL: https://issues.apache.org/jira/browse/HBASE-15202
Project: HBase
Issue Type: Sub-task
Reporter: ramkrishna.s.vasudevan
Assignee: ramkrishna.s.vasudevan
Priority: Minor
Fix For: 2.0.0
Probably this can move under HBASE-15177. During RpcServer#setResponse we do
IPCUtil.getDelimitedMessageAsByteBuffer for the header and result. This
internally creates a byte[], CodedOutputStream and a BB. Then the totalSize is
also wrapped in a BB.
Finally all these BB are passed to BufferChain along with the Cellblock.
This JIRA is to reduce the number of objects that we create here and allow one
BB from this header, result and total Size along with one CodedOutputStream and
pass this BB along with the Cellblocks to the Bufferchain. From the JMC tool
can observe around 2% lesser object allocation arising out of these objects.
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