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From "Jeremiah Jordan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-5319) Add new GC Log Rotation options to cassandra-env.sh
Date Fri, 08 Mar 2013 02:24:12 GMT
Jeremiah Jordan created CASSANDRA-5319:
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             Summary: Add new GC Log Rotation options to cassandra-env.sh
                 Key: CASSANDRA-5319
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5319
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Jeremiah Jordan
            Priority: Trivial


JDK u34 and later added built in GC log rotation:
http://www.oracle.com/technetwork/java/javase/2col/6u34-bugfixes-1733379.html
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6941923

1) -XX:+UseGCLogRotation                       must be used with -Xloggc:<filename>
2) -XX:NumberOfGClogFiles=<number of files>    must be >=1, default is one
3) -XX:GCLogFileSize=<number>M (or K)          default will be set to 512K

if UseGCLogRotation set and -Xloggc gives file name, do Log rotation, depends on other flag
settings.
if NumberOfGClogFiles = 1, using same file, rotate log when reaches file capicity (set by
GCLogFileSize) in <filename>.0
if NumberOfGClogFiles > 1, rotate between files <filename>.0, <filename>.1,
..., <filename>.n-1

We should add these to the commented out gc logging options in cassandra-env.sh

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