Mark Tse created HBASE-12309:
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Summary: Customize Java Heap min/max settings for individual
processes
Key: HBASE-12309
URL: https://issues.apache.org/jira/browse/HBASE-12309
Project: HBase
Issue Type: Improvement
Components: master, regionserver, REST
Affects Versions: 0.99.1, 0.98.5
Reporter: Mark Tse
Priority: Minor
The separate processes (master, regionserver, zookeeper, rest, etc.) all run
using $JAVA_HEAP_MAX in 'bin/hbase'. However, there may be cases where we want
the processes to run with different Java max heap sizes.
In 0.98.5, HBASE_(.*)_OPTS variables exist for these processes and can be used
to add the Xms and Xmx tags, but because of how the default for JAVA_HEAP_MAX
is set, it will always add '-Xmx1000m' to the final call to start up the
master/regionserver/rest process, resulting in two different Java heap settings
(e.g. -Xmx1000m and -Xmx8g is used when starting the master).
In 0.99.1, this default no longer exists so HBASE_(.*)_OPTS is usable, but it
would be nice to have dedicated variables for each process.
This issue also exists in Hadoop HDFS ([HDFS-7255]).
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