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From j...@apache.org
Subject cassandra git commit: Add a note about new JVM settings for 3.0 in NEWS.TXT
Date Fri, 31 Jul 2015 20:08:59 GMT
Repository: cassandra
Updated Branches:
  refs/heads/trunk 1774eb9a8 -> 43139f866


Add a note about new JVM settings for 3.0 in NEWS.TXT

patch by tjake; reviewed by jbellis for CASSANDRA-9483


Project: http://git-wip-us.apache.org/repos/asf/cassandra/repo
Commit: http://git-wip-us.apache.org/repos/asf/cassandra/commit/43139f86
Tree: http://git-wip-us.apache.org/repos/asf/cassandra/tree/43139f86
Diff: http://git-wip-us.apache.org/repos/asf/cassandra/diff/43139f86

Branch: refs/heads/trunk
Commit: 43139f8668e0a524035507efc619cd0e0f06cea9
Parents: 1774eb9
Author: T Jake Luciani <jake@apache.org>
Authored: Fri Jul 31 16:07:28 2015 -0400
Committer: T Jake Luciani <jake@apache.org>
Committed: Fri Jul 31 16:08:50 2015 -0400

----------------------------------------------------------------------
 NEWS.txt | 6 ++++++
 1 file changed, 6 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/cassandra/blob/43139f86/NEWS.txt
----------------------------------------------------------------------
diff --git a/NEWS.txt b/NEWS.txt
index 392a581..0e0d7c4 100644
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -23,9 +23,15 @@ New features
      for non-primary key queries, and perform much better for indexing high
      cardinality columns. 
      See http://www.datastax.com/dev/blog/new-in-cassandra-3-0-materialized-views 
+
    
 Upgrading
 ---------
+   - 3.0 requires Java 8u20 or later.
+   - The default JVM GC has been changed to G1GC.
+   - The default JVM flag -XX:+PerfDisableSharedMem will cause the following tools JVM
+     to stop working: jps, jstack, jinfo, jmc, jcmd as well as 3rd party tools like Jolokia.
+     If you wish to use these tools you can comment this flag out in cassandra-env.{sh,ps1}
    - New write stages have been added for batchlog and materialized view mutations
      you can set their size in cassandra.yaml
    - User defined functions are now executed in a sandbox.


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