liu ming created TRAFODION-2046:
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Summary: change DTM's memoryUsageChore default settings to enable
memory threthold
Key: TRAFODION-2046
URL: https://issues.apache.org/jira/browse/TRAFODION-2046
Project: Apache Trafodion
Issue Type: Improvement
Reporter: liu ming
DTM provide MemoryUsageChore to monitor the memory pressure in a RegionServer,
when memory is beyond a defined threshold, it will give a warning or prevent
new operations based on a flag.
By default, the threshold is now 100%, and the flag is just warning. So that
means DTM coprocessor can use all RS memory and when it find memory pressure ,
just print warning, instead of control new transaction.
This will lead to un-predictable behavior for certain fat transaction.
It is better to change the default setting to enable protection.
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