Mario Almeida [http://community.jboss.org/people/mario.almeida] created the discussion
"tuning of JVM" To view the discussion, visit: http://community.jboss.org/message/562576#562576 -------------------------------------------------------------- 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 | Before | After | Time | | 67910 | 8160 | 0.01124 | | 8160 | 7890 | 0.089276 | | 138450 | 18307 | 0.01023 | | 148867 | 31076 | 0.020333 | | 84187 | 38918 | 0.020976 | | 38918 | 38579 | 0.264469 | | 169139 | 47306 | 0.010821 | | 177866 | 55031 | 0.020886 | | 185591 | 58003 | 0.017817 | | 185363 | 61550 | 0.018758 | | 172014 | 68685 | 0.024119 | | 179149 | 74589 | 0.028192 | | 178397 | 80153 | 0.022211 | | 183961 | 82988 | 0.018935 | | 189484 | 86900 | 0.013572 | | 193396 | 88065 | 0.016476 | | 191393 | 95872 | 0.009507 | | 199296 | 100037 | 0.012184 | | 205445 | 101781 | 0.007035 | | 207189 | 102516 | 0.005844 | | 209384 | 102951 | 0.003822 | | 209831 | 104487 | 0.004506 | | 212994 | 104022 | 0.004398 | | 212630 | 104138 | 0.003814 | | 216202 | 105215 | 0.004032 | | 217279 | 105590 | 0.003863 | | 222134 | 105791 | 0.005497 | | 222335 | 106069 | 0.00365 | | 227267 | 107093 | 0.003381 | | 228373 | 107426 | 0.003942 | | 233954 | 108218 | 0.004841 | | 234746 | 108441 | 0.003837 | | 239961 | 108776 | 0.003702 | | 240296 | 109691 | 0.004393 | | 245883 | 110735 | 0.005467 | | 246927 | 113158 | 0.009279 | | 254022 | 112053 | 0.007649 | | 252917 | 112057 | 0.005108 | | 257081 | 111999 | 0.004932 | | 257023 | 113045 | 0.00562 | | 261141 | 113898 | 0.005607 | | 261994 | 114388 | 0.005883 | | 265556 | 114417 | 0.004873 | | 265585 | 115265 | 0.007753 | | 268865 | 115827 | 0.007209 | | 269427 | 116785 | 0.006272 | | 272667 | 118328 | 0.006826 | | 274232 | 118351 | 0.006551 | | 276367 | 118402 | 0.005399 | | 276418 | 120218 | 0.007433 | | 279962 | 120963 | 0.009114 | | 280707 | 119886 | 0.005476 | | 280526 | 122200 | 0.008937 | | 282840 | 124072 | 0.010552 | | 284712 | 122330 | 0.006757 | | 282970 | 123936 | 0.00912 | | 285344 | 124890 | 0.009292 | | 286298 | 124362 | 0.007613 | | 286538 | 125830 | 0.009574 | | 288006 | 126404 | 0.009543 | | 289284 | 126641 | 0.009608 | | 289521 | 128555 | 0.011272 | | 291755 | 127926 | 0.009885 | | 291126 | 129245 | 0.011053 | | 292702 | 127820 | 0.008749 | | 291404 | 128374 | 0.007936 | | 291958 | 129143 | 0.007507 | | 292727 | 129395 | 0.007756 | | 293299 | 129869 | 0.007054 | | 293773 | 130709 | 0.007014 | | 294997 | 130884 | 0.007413 | | 295172 | 131118 | 0.007388 | | 295918 | 132533 | 0.007544 | | 297333 | 132626 | 0.006971 | | 297938 | 134040 | 0.008049 | | 299352 | 134444 | 0.007505 | | 300396 | 136355 | 0.010362 | | 302307 | 136472 | 0.00994 | | 302104 | 136633 | 0.008865 | | 302227 | 137758 | 0.010389 | | 303774 | 139274 | 0.010978 | | 305290 | 139054 | 0.011067 | | 304430 | 139612 | 0.011818 | | 304988 | 140242 | 0.010733 | | 305810 | 140619 | 0.010408 | | 306187 | 141614 | 0.010614 | | 307630 | 142919 | 0.012793 | | 308935 | 144229 | 0.014377 | | 308709 | 143014 | 0.011988 | | 307494 | 144805 | 0.015654 | | 309029 | 143489 | 0.011692 | | 307713 | 143602 | 0.00943 | | 307826 | 144560 | 0.009486 | | 308784 | 145840 | 0.01116 | | 310384 | 145356 | 0.009615 | | 309900 | 146427 | 0.009441 | | 311387 | 149017 | 0.011989 | | 314009 | 147795 | 0.010213 | | 312659 | 148303 | 0.009085 | | 313167 | 150238 | 0.011596 | | 315230 | 151294 | 0.014132 | | 316286 | 150406 | 0.010096 | | 315334 | 152324 | 0.012351 | | 317252 | 152389 | 0.011761 | | 317573 | 152533 | 0.012058 | | 317717 | 152391 | 0.010228 | | 318151 | 153109 | 0.010195 | | 318869 | 153929 | 0.010222 | | 319881 | 154847 | 0.010916 | | 320799 | 156969 | 0.013489 | | 322601 | 156607 | 0.013065 | | 322239 | 158497 | 0.014829 | | 323745 | 158842 | 0.014876 | | 324090 | 158653 | 0.013889 | | 323645 | 160475 | 0.016195 | | 325467 | 162143 | 0.021307 | | 324575 | 159037 | 0.014079 | 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/showImage/2-562576-8468/heap.png http://community.jboss.org/servlet/JiveServlet/downloadImage/2-562576-8468/450-280/heap.png -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/562576#562576] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2078]
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