Need advise on the performance issues faced on a java application.
I have an application on 32 bit JVM. The RAM is 16 GB. I have not been able to allocate more than 3 gb to heap size. The application has been coming to a halt once every week. I need to restart the application to bring it back. I am attaching the jstat result for one day and also the JVM parameters for that day.
I have tried multiple jvm parameters but this has not helped much. The next option looks to be a migration to 64 bit JVM. I request you to look at the data below and suggest options.
JVM parameters
Xms3072m -Xmx3072m -XX:PermSize=256m -XX:MaxPermSize=256m -XX:+DisableExplicitGC -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=60 -XX:+HeapDumpOnOutOfMemoryError
JSTAT results
Mon Jan 26 00:19:39 EET 2015 Interval 60 seconds
Timestamp S0 S1 E O P YGC YGCT FGC FGCT GCT
286262.1 100.00 0.00 22.34 57.58 89.79 15554 3246.653 1051 701.262 3947.916
286322.2 100.00 0.00 43.81 57.58 89.79 15554 3246.653 1051 701.262 3947.916
286382.2 100.00 0.00 49.98 57.58 89.79 15554 3246.653 1051 701.262 3947.916
286442.2 100.00 0.00 51.28 57.58 89.79 15554 3246.653 1051 701.262 3947.916
286502.3 100.00 0.00 54.97 57.58 89.80 15554 3246.653 1051 701.262 3947.916
286562.3 100.00 0.00 56.26 57.58 89.80 15554 3246.653 1051 701.262 3947.916
286622.3 100.00 0.00 57.55 57.58 89.80 15554 3246.653 1051 701.262 3947.916
286682.3 100.00 0.00 59.81 57.58 89.80 15554 3246.653 1051 701.262 3947.916
286742.3 100.00 0.00 60.91 57.58 89.80 15554 3246.653 1051 701.262 3947.916
286802.3 100.00 0.00 71.81 57.58 89.81 15554 3246.653 1051 701.262 3947.916
286862.3 100.00 0.00 84.60 57.58 89.81 15554 3246.653 1051 701.262 3947.916
286922.3 0.00 64.88 21.38 58.28 89.81 15555 3246.758 1051 701.262 3948.021
286982.3 0.00 64.88 46.32 58.28 89.81 15555 3246.758 1051 701.262 3948.021
287042.3 0.00 64.88 53.09 58.28 89.81 15555 3246.758 1051 701.262 3948.021
287102.3 0.00 64.88 57.13 58.28 89.82 15555 3246.758 1051 701.262 3948.021
287162.3 0.00 64.88 58.27 58.28 89.82 15555 3246.758 1051 701.262 3948.021
287222.3 0.00 64.88 74.53 58.28 89.82 15555 3246.758 1051 701.262 3948.021
287282.3 0.00 64.88 77.89 58.28 89.82 15555 3246.758 1051 701.262 3948.021
287342.4 0.00 64.88 98.63 58.28 89.82 15555 3246.758 1051 701.262 3948.021
287402.4 64.44 0.00 3.48 58.28 89.83 15556 3246.828 1051 701.262 3948.090
Mon Jan 26 23:42:24 EET 2015 Interval 60 seconds
Timestamp S0 S1 E O P YGC YGCT FGC FGCT GCT
370426.4 0.00 46.75 35.31 66.61 98.28 24171 5274.749 4433 3581.247 8855.996
370486.4 53.09 0.00 82.74 66.42 98.28 24174 5275.000 4440 3589.427 8864.427
370546.4 0.00 70.75 20.08 66.44 98.29 24177 5275.268 4447 3597.819 8873.088
370606.5 0.00 87.29 95.62 66.48 98.30 24179 5275.997 4455 3604.747 8880.744
370666.5 43.93 0.00 66.47 66.52 98.31 24182 5276.234 4463 3612.632 8888.866
370726.5 73.27 0.00 13.07 66.67 98.31 24190 5278.474 4471 3620.204 8898.678
370786.5 0.00 45.51 39.18 66.49 98.31 24193 5278.703 4479 3627.072 8905.775
370846.5 0.00 28.57 69.10 66.08 98.32 24197 5279.345 4488 3632.354 8911.699
370906.5 0.00 97.48 16.71 66.23 98.36 24203 5281.344 4496 3638.235 8919.579
370966.5 87.66 0.00 54.15 66.37 98.37 24206 5281.611 4503 3645.747 8927.358
371026.5 0.00 45.54 20.35 66.67 98.37 24209 5281.832 4511 3654.457 8936.289
371086.5 72.28 0.00 28.90 66.67 98.37 24212 5282.108 4519 3661.300 8943.408
371146.5 38.50 0.00 69.69 66.74 98.38 24216 5282.480 4527 3665.885 8948.365
371206.5 0.00 44.33 41.07 66.48 98.39 24221 5283.158 4537 3672.664 8955.821
371266.5 0.00 84.53 56.12 74.05 79.66 24229 5285.544 4544 3697.599 8983.143
371326.5 0.00 60.22 83.81 66.12 79.67 24231 5285.983 4552 3706.708 8992.691
371386.5 0.00 66.38 64.78 66.15 79.67 24235 5286.622 4560 3714.532 9001.154
371446.5 27.16 0.00 83.74 70.22 79.68 24238 5287.051 4568 3725.204 9012.255
371506.5 0.00 100.00 36.93 65.91 79.69 24241 5287.437 4576 3739.038 9026.475
371566.5 53.98 0.00 36.05 67.48 79.70 24244 5288.096 4583 3749.627 9037.723
