Alex Rudyy created QPID-6766:
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Summary: [Java Broker/Message Stores] Chunk message content in
order to optimase memory usage
Key: QPID-6766
URL: https://issues.apache.org/jira/browse/QPID-6766
Project: Qpid
Issue Type: Improvement
Components: Java Broker
Affects Versions: qpid-java-6.0
Reporter: Alex Rudyy
At the moment, we store message content in BDB Message Store in one chunk. On
content saving we create a byte array and copy content bytes from a direct
memory into heap in order to save that on disk. As result, the message content
is fully duplicated in direct memory and heap. Such implementation causes an
extensive and inefficient heap usage on storing of big messages which might
cause OOM errors due to heap consumption on message saving. We can optimize
heap memory usage by saving message in chunks with a size equal to Direct Byte
Buffer size which is used to hold content in the direct memory.
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