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comparison src/share/vm/gc_implementation/g1/g1_globals.hpp @ 7612:4967eb4f67a9

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8001425: G1: Change the default values for certain G1 specific flags Summary: 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
author johnc
date Tue, 15 Jan 2013 12:32:26 -0800
parents 37f7535e5f18
children f64ffbf81af5 96a337d307bd
comparison
equal deleted inserted replaced
7611:ff0a7943fd29 7612:4967eb4f67a9
1 /* 1 /*
2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
285 \ 285 \
286 develop(uintx, G1ConcMarkForceOverflow, 0, \ 286 develop(uintx, G1ConcMarkForceOverflow, 0, \
287 "The number of times we'll force an overflow during " \ 287 "The number of times we'll force an overflow during " \
288 "concurrent marking") \ 288 "concurrent marking") \
289 \ 289 \
290 experimental(uintx, G1NewSizePercent, 20, \ 290 experimental(uintx, G1NewSizePercent, 5, \
291 "Percentage (0-100) of the heap size to use as default " \ 291 "Percentage (0-100) of the heap size to use as default " \
292 "minimum young gen size.") \ 292 "minimum young gen size.") \
293 \ 293 \
294 experimental(uintx, G1MaxNewSizePercent, 80, \ 294 experimental(uintx, G1MaxNewSizePercent, 60, \
295 "Percentage (0-100) of the heap size to use as default " \ 295 "Percentage (0-100) of the heap size to use as default " \
296 " maximum young gen size.") \ 296 " maximum young gen size.") \
297 \ 297 \
298 experimental(uintx, G1MixedGCLiveThresholdPercent, 90, \ 298 experimental(uintx, G1MixedGCLiveThresholdPercent, 65, \
299 "Threshold for regions to be considered for inclusion in the " \ 299 "Threshold for regions to be considered for inclusion in the " \
300 "collection set of mixed GCs. " \ 300 "collection set of mixed GCs. " \
301 "Regions with live bytes exceeding this will not be collected.") \ 301 "Regions with live bytes exceeding this will not be collected.") \
302 \ 302 \
303 product(uintx, G1HeapWastePercent, 5, \ 303 product(uintx, G1HeapWastePercent, 10, \
304 "Amount of space, expressed as a percentage of the heap size, " \ 304 "Amount of space, expressed as a percentage of the heap size, " \
305 "that G1 is willing not to collect to avoid expensive GCs.") \ 305 "that G1 is willing not to collect to avoid expensive GCs.") \
306 \ 306 \
307 product(uintx, G1MixedGCCountTarget, 4, \ 307 product(uintx, G1MixedGCCountTarget, 8, \
308 "The target number of mixed GCs after a marking cycle.") \ 308 "The target number of mixed GCs after a marking cycle.") \
309 \ 309 \
310 experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \ 310 experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
311 "An upper bound for the number of old CSet regions expressed " \ 311 "An upper bound for the number of old CSet regions expressed " \
312 "as a percentage of the heap size.") \ 312 "as a percentage of the heap size.") \