saintstack commented on a change in pull request #1527: HBASE-24143 [JDK11]
Switch default garbage collector from CMS
URL: https://github.com/apache/hbase/pull/1527#discussion_r410388110
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File path: bin/hbase
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@@ -136,6 +136,21 @@ if [ -f "$HBASE_HOME/conf/hbase-env-$COMMAND.sh" ]; then
. "$HBASE_HOME/conf/hbase-env-$COMMAND.sh"
fi
+# establish a default value for HBASE_OPTS if it's not already set. For now,
+# all we set is the garbage collector.
+if [ -z "${HBASE_OPTS}" ] ; then
+ major_version_number="$(parse_java_major_version "$(read_java_version)")"
+ case "$major_version_number" in
+ 8|9|10)
+ HBASE_OPTS="-XX:+UseConcMarkSweepGC"
+ ;;
+ 11|*)
+ HBASE_OPTS="-XX:+UseG1GC"
Review comment:
I like the idea of just leaving it out.
GC_OPTS would be new? Lets not if we can avoid it?
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