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HBase, mail # user - Re: suggestion for how eliminate memory problem in heavy-write hbase region server


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Re: suggestion for how eliminate memory problem in heavy-write hbase region server
lars hofhansl 2014-04-28, 23:36
Please let us know how it is going, Henry.

I would at least try setting:
-XX:+UseCMSInitiatingOccupancyOnly
As well as increasing the new size (despite what I have said in other threads, it might be needed here). Maybe start with 512mb instead of 256:
-Xmn512m

I would remove these as it looks like your perm gen might be too small:
-XX:PermSize=160m
-XX:MaxPermSize=160m

Personally I would not recommend G1 just yet. AFAIK it has a nasty fall back to single threaded full GC.

From: Henry Hung <[EMAIL PROTECTED]>
To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
Cc:
Sent: Sunday, April 27, 2014 6:44 PM
Subject: RE: suggestion for how eliminate memory problem in heavy-write hbase region server

@Bryan,

Do I have to recompile the Hadoop-2.2.0 and hbase-0.96 using java 1.7 or just change the JAVA_HOME and restart it?

I would probably use Oracle Java 1.7 u55 to test it.

Best regards,
Henry