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https://issues.apache.org/jira/browse/HBASE-14490?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zephyr Guo updated HBASE-14490:
-------------------------------
Description:
Reusing buffer to read request.It's not necessary to every request free
buffer.The idea of optimization is to reduce the times that allocate ByteBuffer.
*Modification*
1. {{saslReadAndProcess}} ,{{processOneRpc}}, {{processUnwrappedData}},
{{processConnectionHeader}} accept a ByteBuffer instead of byte[].They can move
{{ByteBuffer.position}} correctly when we have read the data.
2. {{processUnwrappedData}} no longer use any extra memory.
3. Maintaining a buffer pool in each {{Connection}}.
was:
Reuse buffer to read request.It's not necessary to every request free
buffer.The idea of optimization is to reduce the times that allocate ByteBuffer.
*Modification*
1. {{saslReadAndProcess}} ,{{processOneRpc}}, {{processUnwrappedData}},
{{processConnectionHeader}} accept a ByteBuffer instead of byte[].They can move
{{ByteBuffer.position}} correctly when we have read the data.
2. {{processUnwrappedData}} no longer use any extra memory.
3. Maintaining a reused ByteBuffer in each {{Connection}}.
a) Size is dynamic to fit specific client.
b) If size deviate far from average size, we replace a new one.
c) Using a SoftReference to reference the buffer.
> [RpcServer] reuse request read buffer
> -------------------------------------
>
> Key: HBASE-14490
> URL: https://issues.apache.org/jira/browse/HBASE-14490
> Project: HBase
> Issue Type: Improvement
> Components: IPC/RPC
> Affects Versions: 2.0.0, 1.0.2
> Reporter: Zephyr Guo
> Assignee: Zephyr Guo
> Labels: performance
> Fix For: 2.0.0, 1.0.2
>
> Attachments: ByteBufferPool.java, HBASE-14490-v1.patch,
> HBASE-14490-v10.patch, HBASE-14490-v11.patch, HBASE-14490-v12.patch,
> HBASE-14490-v2.patch, HBASE-14490-v3.patch, HBASE-14490-v4.patch,
> HBASE-14490-v5.patch, HBASE-14490-v6.patch, HBASE-14490-v7.patch,
> HBASE-14490-v8.patch, HBASE-14490-v9.patch, test-v12-patch
>
>
> Reusing buffer to read request.It's not necessary to every request free
> buffer.The idea of optimization is to reduce the times that allocate
> ByteBuffer.
> *Modification*
> 1. {{saslReadAndProcess}} ,{{processOneRpc}}, {{processUnwrappedData}},
> {{processConnectionHeader}} accept a ByteBuffer instead of byte[].They can
> move {{ByteBuffer.position}} correctly when we have read the data.
> 2. {{processUnwrappedData}} no longer use any extra memory.
> 3. Maintaining a buffer pool in each {{Connection}}.
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