promotion failed

[Ken--@newsgroupstats.hk]

Hi Jon,

uptime is 346136 (96 hours)

first Big GC occur at 227781 second (63th hour)

2nd Big GC occur at 311815 second (86th hour)

Total count of promotion failed = 2

Regards,
Ken



Jon Masamitsu wrote:
> 
> Ken,
> 
> How often do your promotion failures occur?
> 
> Jon
> 
> Ken-- at newsgroupstats.hk wrote On 07/18/08 05:21,:
> 
>>Dear All,
>>
>>please advise any more tuning for avoiding promotion failed
>>
>>VM Options:
>>"C:\Program Files\Java\jdk1.6.0_04\bin\java" -server -verbose:gc
>>-XX:+PrintGCDetails -Xloggc:gc.log -showversion -Xms4G -Xmx4G
>>-XX:NewSize=512M -XX:PermSize=64M -XX:MaxPermSize=64M
>>-XX:+CMSClassUnloadingEnabled -XX:+DisableExplicitGC
-XX:+UseConcMarkSweepGC
>>-XX:+UseParNewGC -XX:SurvivorRatio=6 -XX:CMSInitiatingOccupancyFraction=70
>>-XX:TargetSurvivorRatio=90 -XX:+HandlePromotionFailure
>>-Dcom.sun.management.jmxremote.port=7191
>>-Dcom.sun.management.jmxremote.authenticate=false
>>-Dcom.sun.management.jmxremote.ssl=false
>>
>>GC Log:
>>227734.958: [GC 227734.958: [ParNew: 458751K->65536K(458752K), 0.4883967
>>secs] 2975829K->2611470K(4128768K), 0.4885529 secs] [Times: user=1.42
>>sys=0.20, real=0.48 secs] 
>>227781.363: [GC 227781.363: [ParNew (promotion failed):
>>458752K->458751K(458752K), 1.1739277 secs]
>>227782.544: [CMS: 2566464K->903491K(3670016K), 14.2218888 secs]
>>3004686K->903491K(4128768K), 15.4022930 secs] [Times: user=16.16 sys=0.70,
>>real=15.39 secs] 
>>227796.767: [GC [1 CMS-initial-mark: 903491K(3670016K)] 910269K(4128768K),
>>0.0014926 secs] [Times: user=0.02 sys=0.00, real=0.00 secs] 
>>227796.769: [CMS-concurrent-mark-start]
>>227799.448: [GC 227799.449: [ParNew: 393216K->21851K(458752K), 0.0851390
>>secs] 1296707K->925343K(4128768K), 0.0853620 secs] [Times: user=0.86
>>sys=0.00, real=0.09 secs] 
>>227799.536: [CMS-concurrent-mark: 2.670/2.767 secs] [Times: user=9.72
>>sys=0.03, real=2.77 secs] 
>>227799.536: [CMS-concurrent-preclean-start]
>>227800.624: [GC 227800.624: [ParNew: 415067K->11565K(458752K), 0.0345770
>>secs] 1318559K->915056K(4128768K), 0.0347455 secs] [Times: user=0.27
>>sys=0.06, real=0.05 secs] 
>>227800.684: [CMS-concurrent-preclean: 0.995/1.148 secs] [Times: user=4.38
>>sys=0.23, real=1.14 secs] 
>>227800.684: [CMS-concurrent-abortable-preclean-start]
>>227801.270: [CMS-concurrent-abortable-preclean: 0.475/0.587 secs] [Times:
>>user=2.22 sys=0.09, real=0.59 secs] 
>>227801.273: [GC[YG occupancy: 240407 K (458752 K)]227801.273: [Rescan
>>(parallel) , 0.0092978 secs]227801.282: [weak refs processing, 0.0002179
>>secs]227801.283: [class unloading, 0.0082907 secs]227801.291: [scrub
symbol
>>& string tables, 0.0066056 secs] [1 CMS-remark: 903491K(3670016K)]
>>1143898K(4128768K), 0.0275619 secs] [Times: user=0.03 sys=0.00, real=0.03
>>secs] 
>>227801.302: [CMS-concurrent-sweep-start]
>>227803.075: [CMS-concurrent-sweep: 1.773/1.773 secs] [Times: user=4.19
>>sys=0.03, real=1.77 secs] 
>>227803.075: [CMS-concurrent-reset-start]
>>227803.103: [CMS-concurrent-reset: 0.028/0.028 secs] [Times: user=0.06
>>sys=0.00, real=0.03 secs] 
>>227816.785: [GC 227816.786: [ParNew: 404776K->25694K(458752K), 0.2086003
>>secs] 1188297K->809215K(4128768K), 0.2087517 secs] [Times: user=1.13
>>sys=0.19, real=0.20 secs] 
>>
>>Regards,
>>Ken
>>
>>
>>
>>  
>>
> 
> 
> 

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