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https://issues.apache.org/jira/browse/TRAFODION-2046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15328221#comment-15328221
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ASF GitHub Bot commented on TRAFODION-2046:
-------------------------------------------
Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/542#discussion_r66863249
--- Diff:
core/sqf/src/seatrans/hbase-trx/src/main/java/org/apache/hadoop/hbase/coprocessor/transactional/TrxRegionEndpoint.java.tmpl
---
@@ -359,7 +359,7 @@ CoprocessorService, Coprocessor {
private static final int DEFAULT_SLEEP = 60 * 1000;
private static final int DEFAULT_MEMORY_THRESHOLD = 100; // 100% memory
used
--- End diff --
Why not simply change the "static final int DEFAULT_MEMORY_THRESHOLD" to 90?
> 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
> Assignee: 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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