Optimizing JVM Parameters

Scenario

When the number of clusters reaches a certain scale, the default settings of the Java virtual machine (JVM) cannot meet the cluster requirements. In this case, the cluster performance deteriorates or the clusters may be unavailable. Therefore, JVM parameters must be properly configured based on actual service conditions to improve the cluster performance.

Procedure

Navigation path for setting parameters:

The JVM parameters related to the HBase role must be configured in the hbase-env.sh file in the ${BIGDATA_HOME}/FusionInsight_HD_*/install/FusionInsight-HBase-*/hbase/conf/ directory of the node where the HBase service is installed.

Each role has JVM parameter configuration variables, as shown in Table 1.

**Table 1** HBase-related JVM parameter configuration variables
Variable	Affected Role
HBASE_OPTS	All roles of HBase
SERVER_GC_OPTS	All roles on the HBase server, such as Master and RegionServer
CLIENT_GC_OPTS	Client process of HBase
HBASE_MASTER_OPTS	Master of HBase
HBASE_REGIONSERVER_OPTS	RegionServer of HBase
HBASE_THRIFT_OPTS	Thrift of HBase

Configuration example:

export HADOOP_NAMENODE_OPTS="-Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender} $HADOOP_NAMENODE_OPTS"

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