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The following page has been changed by JeanDanielCryans: http://wiki.apache.org/hadoop/PerformanceTuning The comment on the change is: added a tip I already sent to the mailing list. ------------------------------------------------------------------------------ * Make sure that the command {{{java}}} implies {{{-server}}} on your machines, or else you will have to explicitly enable it. * Are you swapping? JVMs hate swapping. Adjusting [http://www.sollers.ca/blog/2008/swappiness/ swappiness] may help. * By default, each regionserver puts up 10 listeners only. Up it if you have measurable traffic (See hbase.regionserver.handler.count in hbase-default.xml). + * To speed up the inserts in a non critical job (like an import job), you can use Put.writeToWAL(false) to bypass writing to the write ahead log. == HBase JVM and GC ==
