Alex Rudyy created QPID-8168:
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Summary: [Broker-J] Broker should flow to disk transient messages
when heap usage reaches critical threshold in order to avoid running of heap
memory due to consumption of heap by transient message metadata
Key: QPID-8168
URL: https://issues.apache.org/jira/browse/QPID-8168
Project: Qpid
Issue Type: Bug
Components: Broker-J
Affects Versions: qpid-java-broker-7.0.1, qpid-java-broker-7.0.0,
qpid-java-6.0.8, qpid-java-broker-7.0.2, qpid-java-broker-7.0.3,
qpid-java-6.1.6, qpid-java-broker-7.1.0
Reporter: Alex Rudyy
The flow to disk is currently triggered when direct memory usage reaches
predefined threshold ({{broker.flowToDiskThreshold}} which is set to 75% of
direct memory size by default). However, in some situations (for example, when
direct memory size is big and heap memory size is small), the direct memory
threshold is not reached but the heap is fully occupied by transient messages
data, the broker runs out of heap memory.
The broker behaviour can be improved by triggering flow to disk when a heap
occupancy reaches the critical threshold in addition to direct memory usage
threshold.
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