Udo Kohlmeyer created GEODE-10067:
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Summary: WANCopyRegionFunctionDelegate needs to be optimized to
handle large regions
Key: GEODE-10067
URL: https://issues.apache.org/jira/browse/GEODE-10067
Project: Geode
Issue Type: Improvement
Components: wan
Affects Versions: 1.15.0, 1.16.0
Reporter: Udo Kohlmeyer
The current WanCopyRegionFunctionDelegate may cause significant memory issues
in with really large regions.
The
[getEntries|https://github.com/apache/geode/blob/develop/geode-wan/src/main/java/org/apache/geode/management/internal/cli/functions/WanCopyRegionFunctionDelegate.java#L102]
method returns both primary and redundant Region Entries for local server.
The invocation of getEntries from the PartitionedRegionDataStore will cause all
entries to be deserialized
https://github.com/apache/geode/blob/develop/geode-core/src/main/java/org/apache/geode/internal/cache/PartitionedRegionDataStore.java#L2501-L2515
The
[createBatch|https://github.com/apache/geode/blob/develop/geode-wan/src/main/java/org/apache/geode/management/internal/cli/functions/WanCopyRegionFunctionDelegate.java#L107-L108]
method creates a List<GatewayQueueEvent> equally that of the local Region size.
Essentially ... In a system with VERY large regions this might cause
significant memory issues
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