[GitHub] yiming187 closed pull request #155: KYLIN-3321, Set env MALLOC_ARENA_MAX=4 by default.

[GitBox <gi...@apache.org>]

yiming187 closed pull request #155: KYLIN-3321, Set env MALLOC_ARENA_MAX=4 by default.
URL: https://github.com/apache/kylin/pull/155
 
 
   

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diff --git a/build/conf/setenv.sh b/build/conf/setenv.sh
index bec9dc229e..487b5eff69 100755
--- a/build/conf/setenv.sh
+++ b/build/conf/setenv.sh
@@ -22,6 +22,12 @@
 # (if your're deploying KYLIN on a powerful server and want to replace the default conservative settings)
 # uncomment following to for it to take effect
 export KYLIN_JVM_SETTINGS="-Xms1024M -Xmx4096M -Xss1024K -XX:MaxPermSize=512M -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:$KYLIN_HOME/logs/kylin.gc.$$ -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=64M"
+
+# Newer versions of glibc use an arena memory allocator that causes virtual
+# memory usage to explode. Tune the variable down to prevent vmem explosion.
+# See HADOOP-7154.
+export MALLOC_ARENA_MAX=${MALLOC_ARENA_MAX:-4}
+
 # export KYLIN_JVM_SETTINGS="-Xms16g -Xmx16g -XX:MaxPermSize=512m -XX:NewSize=3g -XX:MaxNewSize=3g -XX:SurvivorRatio=4 -XX:+CMSClassUnloadingEnabled -XX:+CMSParallelRemarkEnabled -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:CMSInitiatingOccupancyFraction=70 -XX:+UseCMSInitiatingOccupancyOnly -XX:+DisableExplicitGC -XX:+HeapDumpOnOutOfMemoryError -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:$KYLIN_HOME/logs/kylin.gc.$$ -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=64M"
 
 # uncomment following to for it to take effect(the values need adjusting to fit your env)


 

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