hadoop的記憶體heap大小的配置引數
阿新 • • 發佈:2019-01-07
1、tasktracker的heapsize的大小設定
<property>
<name>mapred.child.java.opts</name>
<value>-Xmx200m</value>
<description>Java opts for the task tracker child processes.
The following symbol, if present, will be interpolated: @[email protected] is replaced
by current TaskID. Any other occurrences of '@' will go unchanged.
For example, to enable verbose gc logging to a file named for the taskid in
/tmp and to set the heap maximum to be a gigabyte, pass a 'value' of:
-Xmx1024m -verbose:gc -Xloggc:/tmp/@ [email protected]
The configuration variable mapred.child.ulimit can be used to control the
maximum virtual memory of the child processes.
</description>
</property>
2、namenode、datanode和jobtracker的heapsize的設定:
hadoop-env.sh中的HADOOP_HEAPSIZE的變數來制定
<property>
<name>mapred.child.java.opts</name>
<value>-Xmx200m</value>
<description>Java opts for the task tracker child processes.
The following symbol, if present, will be interpolated: @[email protected] is replaced
by current TaskID. Any other occurrences of '@' will go unchanged.
For example, to enable verbose gc logging to a file named for the taskid in
/tmp and to set the heap maximum to be a gigabyte, pass a 'value' of:
-Xmx1024m -verbose:gc -Xloggc:/tmp/@
The configuration variable mapred.child.ulimit can be used to control the
maximum virtual memory of the child processes.
</description>
</property>
2、namenode、datanode和jobtracker的heapsize的設定:
hadoop-env.sh中的HADOOP_HEAPSIZE的變數來制定