an excessively large buffer is used by default when persisting the 0-10 message 
metadata
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                 Key: QPID-3561
                 URL: https://issues.apache.org/jira/browse/QPID-3561
             Project: Qpid
          Issue Type: Bug
          Components: Java Broker
    Affects Versions: 0.12
            Reporter: Robbie Gemmell
            Assignee: Robbie Gemmell
             Fix For: 0.13


An excessively large buffer is used by default when persisting the 0-10 message 
metadata, making every message have a 65K buffer even if the metadata is tiny. 
The objects holding this buffer are SoftReferenced so it is possible for the 
broker to conintune without an OOME occuring, but the artifically large buffer 
results in the heap being filled more quickly than necessary and will lead to 
increased GC activity.The encoder is able to grow its buffer if necessary so we 
should default to a smaller buffer, say 1K.

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