8001425: G1: Change the default values for certain G1 specific flags
Changes to default and ergonomic flag values recommended by performance team. Changes were also reviewed by Monica Beckwith <monica.beckwith@oracle.com>.
Reviewed-by: brutisso, huntch
diff --git a/hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp b/hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp
index 5e9e689..953520c 100644
--- a/hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1_globals.hpp
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -291,24 +291,24 @@
"The number of times we'll force an overflow during " \
"concurrent marking") \
\
- experimental(uintx, G1NewSizePercent, 20, \
+ experimental(uintx, G1NewSizePercent, 5, \
"Percentage (0-100) of the heap size to use as default " \
"minimum young gen size.") \
\
- experimental(uintx, G1MaxNewSizePercent, 80, \
+ experimental(uintx, G1MaxNewSizePercent, 60, \
"Percentage (0-100) of the heap size to use as default " \
" maximum young gen size.") \
\
- experimental(uintx, G1MixedGCLiveThresholdPercent, 90, \
+ experimental(uintx, G1MixedGCLiveThresholdPercent, 65, \
"Threshold for regions to be considered for inclusion in the " \
"collection set of mixed GCs. " \
"Regions with live bytes exceeding this will not be collected.") \
\
- product(uintx, G1HeapWastePercent, 5, \
+ product(uintx, G1HeapWastePercent, 10, \
"Amount of space, expressed as a percentage of the heap size, " \
"that G1 is willing not to collect to avoid expensive GCs.") \
\
- product(uintx, G1MixedGCCountTarget, 4, \
+ product(uintx, G1MixedGCCountTarget, 8, \
"The target number of mixed GCs after a marking cycle.") \
\
experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
