close Warning: Can't synchronize with repository "(default)" (Unsupported version control system "svn": /usr/lib/python2.7/dist-packages/libsvn/_repos.so: failed to map segment from shared object: Cannot allocate memory). Look in the Trac log for more information.

Changes between Version 1 and Version 2 of jazz/10-07-28


Ignore:
Timestamp:
Jul 30, 2010, 12:38:40 PM (15 years ago)
Author:
jazz
Comment:

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  • jazz/10-07-28

    v1 v2  
    22
    33 * [服務] hadoop.nchc.org.tw HDFS 連線緩慢狀況處理
     4   * [原因] 小檔案太多，記憶體 HEAP Size 不足，已經使用到 100%，導致系統緩慢。
     5   * [[Image(wiki:jazz/10-07-28:10-07-28_Hadoop_Out_of_HEAP_1.png)]]
     6   * [[Image(wiki:jazz/10-07-28:10-07-28_Hadoop_Out_of_HEAP_3.png)]]
     7   * [解法] 修改 /etc/hadoop/conf/hadoop-env.sh 中的 HADOOP_HEAPSIZE : 從 2048 一直加到 4096 才穩定!!
     8{{{
     9# The maximum amount of heap to use, in MB. Default is 1000.
     10export HADOOP_HEAPSIZE=4096
     11}}}