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tuning of JVM

created by Mario Almeida in Performance Tuning - View the full discussion

Hi All,

 

OS CentOS 5.5 64bit

I am using JBOSS 4.2.3

JAVA 1.6u21

 

JAVA_OPTS=  -server -XX:MaxNewSize=170m -XX:NewSize=170m -Xmx512m -Xms512m -XX:MaxPermSize=256m -Xss256k -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -verbose:gc -Djava.net.preferIPv4Stack=true

 

As per 'GARBAGE COLLECTION STATISTICAL ANALYSIS 201' below is the output of -verbose:gc

 

 

 

BeforeAfterTime
6791081600.01124
816078900.089276
138450183070.01023
148867310760.020333
84187389180.020976
38918385790.264469
169139473060.010821
177866550310.020886
185591580030.017817
185363615500.018758
172014686850.024119
179149745890.028192
178397801530.022211
183961829880.018935
189484869000.013572
193396880650.016476
191393958720.009507
1992961000370.012184
2054451017810.007035
2071891025160.005844
2093841029510.003822
2098311044870.004506
2129941040220.004398
2126301041380.003814
2162021052150.004032
2172791055900.003863
2221341057910.005497
2223351060690.00365
2272671070930.003381
2283731074260.003942
2339541082180.004841
2347461084410.003837
2399611087760.003702
2402961096910.004393
2458831107350.005467
2469271131580.009279
2540221120530.007649
2529171120570.005108
2570811119990.004932
2570231130450.00562
2611411138980.005607
2619941143880.005883
2655561144170.004873
2655851152650.007753
2688651158270.007209
2694271167850.006272
2726671183280.006826
2742321183510.006551
2763671184020.005399
2764181202180.007433
2799621209630.009114
2807071198860.005476
2805261222000.008937
2828401240720.010552
2847121223300.006757
2829701239360.00912
2853441248900.009292
2862981243620.007613
2865381258300.009574
2880061264040.009543
2892841266410.009608
2895211285550.011272
2917551279260.009885
2911261292450.011053
2927021278200.008749
2914041283740.007936
2919581291430.007507
2927271293950.007756
2932991298690.007054
2937731307090.007014
2949971308840.007413
2951721311180.007388
2959181325330.007544
2973331326260.006971
2979381340400.008049
2993521344440.007505
3003961363550.010362
3023071364720.00994
3021041366330.008865
3022271377580.010389
3037741392740.010978
3052901390540.011067
3044301396120.011818
3049881402420.010733
3058101406190.010408
3061871416140.010614
3076301429190.012793
3089351442290.014377
3087091430140.011988
3074941448050.015654
3090291434890.011692
3077131436020.00943
3078261445600.009486
3087841458400.01116
3103841453560.009615
3099001464270.009441
3113871490170.011989
3140091477950.010213
3126591483030.009085
3131671502380.011596
3152301512940.014132
3162861504060.010096
3153341523240.012351
3172521523890.011761
3175731525330.012058
3177171523910.010228
3181511531090.010195
3188691539290.010222
3198811548470.010916
3207991569690.013489
3226011566070.013065
3222391584970.014829
3237451588420.014876
3240901586530.013889
3236451604750.016195
3254671621430.021307
3245751590370.014079

 

Even if I increase the heap size and adjust the NewSize to 1/3 I always get a rising graph.

 

In the article it says Heap usage has stabilize with both the heap usage before collection and after collection forming horizontal lines

 

In my situation do I still have to increase the heap size more?

 

http://community.jboss.org/servlet/JiveServlet/downloadImage/2-562576-8468/450-280/heap.png

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