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Posted to commits@lucene.apache.org by us...@apache.org on 2010/06/17 16:33:25 UTC

svn commit: r955615 - /lucene/dev/trunk/lucene/CHANGES.txt

Author: uschindler
Date: Thu Jun 17 14:33:25 2010
New Revision: 955615

URL: http://svn.apache.org/viewvc?rev=955615&view=rev
Log:
restore one entry

Modified:
    lucene/dev/trunk/lucene/CHANGES.txt

Modified: lucene/dev/trunk/lucene/CHANGES.txt
URL: http://svn.apache.org/viewvc/lucene/dev/trunk/lucene/CHANGES.txt?rev=955615&r1=955614&r2=955615&view=diff
==============================================================================
--- lucene/dev/trunk/lucene/CHANGES.txt (original)
+++ lucene/dev/trunk/lucene/CHANGES.txt Thu Jun 17 14:33:25 2010
@@ -885,6 +885,13 @@ Changes in runtime behavior
   fields when reading. You have to reindex to do that.
   (Michael Busch, Uwe Schindler)
 
+* LUCENE-2060: Changed ConcurrentMergeScheduler's default for
+  maxNumThreads from 3 to 1, because in practice we get the most
+  gains from running a single merge in the background.  More than one
+  concurrent merge causes a lot of thrashing (though it's possible on
+  SSD storage that there would be net gains).  (Jason Rutherglen,
+  Mike McCandless)
+
 API Changes
 
 * LUCENE-1257, LUCENE-1984, LUCENE-1985, LUCENE-2057, LUCENE-1833, LUCENE-2012,