Strange isssue about OOM

Mon Jan 14 06:54:33 UTC 2008

Dear,

 Encounter one issue about out of memory, server continued trigger gc
and full gc while the memory is less used, eapesicially the [young].
Please help.Also, what is the theary to trigger gc?Many thanks.

Not calling System.gc(). Performing 10 VU's test. Not reproduced.

The server parameter: -server -Xms512M -Xmx512M -verbose:gc
-XX:PermSize=64M -XX:MaxPermSize=64M.

The log:
25185.728: [GC 25185.728: [DefNew: 163242K->163242K(169600K), 0.0000587
secs]25185.728: [Tenured: 234502K->252491K(349568K), 1.3021262 secs]
397745K->252491K(519168K), 1.3029282 secs]
Total time for which application threads were stopped: 1.3040612 seconds
Application time: 23.7854558 seconds
25210.819: [GC 25210.820: [DefNew: 86804K->1788K(169600K), 0.0486894
secs]25210.868: [Tenured: 266146K->241318K(349568K), 1.2399896 secs]
339295K->241318K(519168K), 1.2888920 secs]
25212.108: [Full GC 25212.109: [Tenured[Unloading class
sun.reflect.GeneratedConstructorAccessor314]
[Unloading class sun.reflect.GeneratedMethodAccessor759]
[Unloading class sun.reflect.GeneratedConstructorAccessor315]
[Unloading class sun.reflect.GeneratedConstructorAccessor268]
[Unloading class sun.reflect.GeneratedConstructorAccessor269]
[Unloading class sun.reflect.GeneratedConstructorAccessor316]
[Unloading class sun.reflect.GeneratedConstructorAccessor313]
: 241318K->226997K(349568K), 1.5769614 secs] 241318K->226997K(519168K),
[Perm : 27510K->27498K(65536K)], 1.5771121 secs]
Total time for which application threads were stopped: 2.8672106 seconds
Application time: 0.0086622 seconds
25213.699: [GC 25213.699: [DefNew: 756K->82K(169600K), 0.0078670
secs]25213.707: [Tenured[Unloading class
sun.reflect.GeneratedConstructorAccessor274]
: 226997K->221430K(349568K), 2.0173917 secs] 227753K->221430K(519168K),
2.0254397 secs]
25215.724: [Full GC 25215.724: [Tenured: 221430K->221422K(349568K),
1.2257687 secs] 221430K->221422K(519168K), [Perm :
27496K->27496K(65536K)], 1.2259138 secs]
Total time for which application threads were stopped: 3.2556802 seconds
Application time: 21.5991046 seconds
25238.563: [GC 25238.563: [DefNew: 18728K->296K(169600K), 0.0169044
secs]25238.580: [Tenured: 221422K->221605K(349568K), 1.3133015 secs]
240150K->221605K(519168K), 1.3303972 secs]
25239.893: [Full GC 25239.894: [Tenured: 221605K->220330K(349568K),
1.2038988 secs] 221605K->220330K(519168K), [Perm :
27497K->27497K(65536K)], 1.2040751 secs]
Total time for which application threads were stopped: 2.5488005 seconds
Application time: 0.0188518 seconds
25241.130: [GC 25241.130: [DefNew: 1990K->59K(169600K), 0.0071533
secs]25241.137: [Tenured: 220330K->220344K(349568K), 1.2219109 secs]
222321K->220344K(519168K), 1.2292561 secs]
25242.359: [Full GC 25242.359: [Tenured: 220344K->220335K(349568K),
1.2026312 secs] 220344K->220335K(519168K), [Perm :
27497K->27497K(65536K)], 1.2027791 secs]
Total time for which application threads were stopped: 2.4439904 seconds
Application time: 24.2665427 seconds
25267.833: [GC 25267.833: [DefNew: 24971K->255K(169600K), 0.0081354
secs]25267.841: [Tenured: 220335K->220542K(349568K), 1.2416907 secs]
245306K->220542K(519168K), 1.2500197 secs]
25269.083: [Full GC 25269.083: [Tenured: 220542K->220317K(349568K),
1.2465385 secs] 220542K->220317K(519168K), [Perm :
27497K->27497K(65536K)], 1.2466957 secs]
Total time for which application threads were stopped: 2.5006234 seconds
Application time: 9.1710434 seconds
25279.513: [GC 25279.513: [DefNew: 11184K->124K(169600K), 0.0191095
secs]25279.532: [Tenured: 220317K->220247K(349568K), 1.2142263 secs]
231502K->220247K(519168K), 1.2335457 secs]
25280.746: [Full GC 25280.746: [Tenured: 220247K->220237K(349568K),
1.2042132 secs] 220247K->220237K(519168K), [Perm :
27497K->27497K(65536K)], 1.2043556 secs]
Total time for which application threads were stopped: 2.4500521 seconds
Application time: 28.5731236 seconds
25310.536: [GC 25310.536: [DefNew: 20905K->185K(169600K), 0.0174417
secs]25310.554: [Tenured: 220237K->220422K(349568K), 1.2108142 secs]
241142K->220422K(519168K), 1.2284657 secs]
25311.765: [Full GC 25311.765: [Tenured: 220422K->220264K(349568K),
1.2223217 secs] 220422K->220264K(519168K), [Perm :
27497K->27497K(65536K)], 1.2224701 secs]
Total time for which application threads were stopped: 2.4631855 seconds
Application time: 0.0368244 seconds
25313.039: [GC 25313.039: [DefNew: 2421K->91K(169600K), 0.0079322
secs]25313.047: [Tenured: 220264K->220182K(349568K), 1.3464051 secs]
222685K->220182K(519168K), 1.3545552 secs]
25314.393: [Full GC 25314.394: [Tenured: 220182K->220172K(349568K),
1.2893013 secs] 220182K->220172K(519168K), [Perm :
27497K->27497K(65536K)], 1.2894685 secs]
Total time for which application threads were stopped: 2.6585330 seconds
Application time: 45.1138619 seconds
25360.803: [GC 25360.803: [DefNew: 29023K->222K(169600K), 0.0078027
secs]25360.811: [Tenured: 220172K->220388K(349568K), 1.2135921 secs]
249195K->220388K(519168K), 1.2215896 secs]
25362.025: [Full GC 25362.025: [Tenured: 220388K->220294K(349568K),
1.1972240 secs] 220388K->220294K(519168K), [Perm :
27497K->27497K(65536K)], 1.1973704 secs]
Total time for which application threads were stopped: 2.4229267 seconds
Application time: 31.0328978 seconds
25394.270: [GC 25394.270: [DefNew: 19657K->162K(169600K), 0.0088962
secs]25394.279: [Tenured: 220294K->220251K(349568K), 1.3206682 secs]
239951K->220251K(519168K), 1.3297797 secs]
25395.599: [Full GC 25395.600: [Tenured: 220251K->220241K(349568K),
1.1989645 secs] 220251K->220241K(519168K), [Perm :
27497K->27497K(65536K)], 1.1991104 secs]
Total time for which application threads were stopped: 2.5428534 seconds
Application time: 92.3087423 seconds
25489.129: [GC 25489.130: [DefNew: 54368K->315K(169600K), 0.0116064
secs]25489.141: [Tenured: 220241K->220556K(349568K), 1.5860020 secs]
274610K->220556K(519168K), 1.5978559 secs]
25490.727: [Full GC 25490.728: [Tenured: 220556K->220393K(349568K),
1.7381398 secs] 220556K->220393K(519168K), [Perm :
27497K->27497K(65536K)], 1.7382875 secs]
Total time for which application threads were stopped: 3.3583027 seconds
Application time: 5.9312480 seconds
25498.413: [GC 25498.413: [DefNew: 5241K->93K(169600K), 0.0172377
secs]25498.430: [Tenured: 220393K->220184K(349568K), 1.2922102 secs]
225635K->220184K(519168K), 1.3096568 secs]
25499.722: [Full GC 25499.722: [Tenured: 220184K->220175K(349568K),
1.1997437 secs] 220184K->220175K(519168K), [Perm :
27497K->27497K(65536K)], 1.1999031 secs]
Total time for which application threads were stopped: 2.5211851 seconds
Application time: 30.6028562 seconds
25531.528: [GC 25531.528: [DefNew: 17776K->156K(169600K), 0.0171998
secs]25531.545: [Tenured: 220175K->220330K(349568K), 1.2259878 secs]
237951K->220330K(519168K), 1.2433891 secs]
25532.771: [Full GC 25532.771: [Tenured: 220330K->220239K(349568K),
1.6592153 secs] 220330K->220239K(519168K), [Perm :
27499K->27498K(65536K)], 1.6593672 secs]
Total time for which application threads were stopped: 2.9038367 seconds
Application time: 60.4048509 seconds
25594.836: [GC 25594.837: [DefNew: 33874K->231K(169600K), 0.0168536
secs]25594.853: [Tenured: 220239K->220323K(349568K), 1.2180811 secs]
254113K->220323K(519168K), 1.2351280 secs]
25596.072: [Full GC 25596.072: [Tenured: 220323K->220313K(349568K),
1.2081214 secs] 220323K->220313K(519168K), [Perm :
27498K->27498K(65536K)], 1.2082667 secs]
Total time for which application threads were stopped: 2.4445252 seconds
Application time: 197.3583592 seconds
25794.639: [GC 25794.640: [DefNew: 106524K->606K(169600K), 0.0115235
secs]25794.651: [Tenured: 220313K->220918K(349568K), 1.2305807 secs]
326837K->220918K(519168K), 1.2423031 secs]
25795.882: [Full GC 25795.882: [Tenured: 220918K->220684K(349568K),
1.4731407 secs] 220918K->220684K(519168K), [Perm :
27499K->27498K(65536K)], 1.4732974 secs]
Total time for which application threads were stopped: 2.7168052 seconds
Application time: 164.9563502 seconds
25962.313: [GC 25962.313: [DefNew: 82927K->507K(169600K), 0.0091128
secs]25962.322: [Tenured: 220684K->220600K(349568K), 1.2012755 secs]
303612K->220600K(519168K), 1.2105846 secs]
25963.523: [Full GC 25963.524: [Tenured: 220600K->220590K(349568K),
1.2976048 secs] 220600K->220590K(519168K), [Perm :
27498K->27498K(65536K)], 1.2977544 secs]
Total time for which application threads were stopped: 2.5095478 seconds
Application time: 318.2895362 seconds
26283.112: [GC 26283.112: [DefNew: 164480K->164480K(169600K), 0.0000494
secs]26283.112: [Tenured: 220590K->221495K(349568K), 1.3880562 secs]
385070K->221495K(519168K), 1.3883772 secs]
Total time for which application threads were stopped: 1.3895031 seconds
Application time: 318.6411712 seconds
26603.143: [GC 26603.143: [DefNew: 164480K->164480K(169600K), 0.0000486
secs]26603.143: [Tenured: 221495K->222391K(349568K), 1.3624147 secs]
385975K->222391K(519168K), 1.3626644 secs]
Total time for which application threads were stopped: 1.3641826 seconds
Application time: 318.5726610 seconds
26923.080: [GC 26923.080: [DefNew: 164480K->164480K(169600K), 0.0000489
secs]26923.080: [Tenured: 222391K->221000K(349568K), 1.3836587 secs]
386871K->221000K(519168K), 1.3839017 secs]
Total time for which application threads were stopped: 1.3854997 seconds
Application time: 319.1556307 seconds
27243.621: [GC 27243.621: [DefNew: 164480K->164480K(169600K), 0.0000463
secs]27243.621: [Tenured: 221000K->221899K(349568K), 1.7850120 secs]
385480K->221899K(519168K), 1.7852453 secs]
Total time for which application threads were stopped: 1.7865089 seconds
Application time: 318.6705844 seconds
27564.079: [GC 27564.079: [DefNew: 164480K->164480K(169600K), 0.0000428
secs]27564.079: [Tenured: 221899K->222801K(349568K), 1.5890202 secs]
386379K->222801K(519168K), 1.5892684 secs]
Total time for which application threads were stopped: 1.5909515 seconds
Application time: 318.5994769 seconds
27884.269: [GC 27884.269: [DefNew: 164480K->164480K(169600K), 0.0000471
secs]27884.269: [Tenured: 222801K->223693K(349568K), 1.6433190 secs]
387281K->223693K(519168K), 1.6435445 secs]
Total time for which application threads were stopped: 1.6447412 seconds
Application time: 94.5616049 seconds
27980.476: [GC 27980.476: [DefNew: 51783K->327K(169600K), 0.0179721
secs]27980.494: [Tenured: 223693K->220424K(349568K), 1.2211616 secs]
275476K->220424K(519168K), 1.2393261 secs]
27981.715: [Full GC 27981.715: [Tenured: 220424K->220413K(349568K),
1.2103792 secs] 220424K->220413K(519168K), [Perm :
27498K->27498K(65536K)], 1.2105386 secs]
Total time for which application threads were stopped: 2.4509644 seconds
Application time: 32.3719363 seconds
28015.299: [GC 28015.299: [DefNew: 18543K->164K(169600K), 0.0073310
secs]28015.306: [Tenured: 220413K->220577K(349568K), 1.2056721 secs]
238957K->220577K(519168K), 1.2131937 secs]
28016.512: [Full GC 28016.512: [Tenured: 220577K->220252K(349568K),
1.2023572 secs] 220577K->220252K(519168K), [Perm :
27499K->27498K(65536K)], 1.2025188 secs]
Total time for which application threads were stopped: 2.4167372 seconds

--------
08/01/03 17:32:28 Stop process

Thanks & Regards
Chris Guan
Tel: 24056255

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