<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<body link="#355491" alink="#4262a1" vlink="#355491" style="background: #e2e2e2; margin: 0; padding: 20px;">
<div>
<table cellpadding="0" bgcolor="#FFFFFF" border="0" cellspacing="0" style="border: 1px solid #dadada; margin-bottom: 30px; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td>
<table border="0" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" style="border: solid 2px #ccc; background: #dadada; width: 100%; -moz-border-radius: 6px; -webkit-border-radius: 6px;">
<tbody>
<tr>
<td bgcolor="#000000" valign="middle" height="58px" style="border-bottom: 1px solid #ccc; padding: 20px; -moz-border-radius-topleft: 3px; -moz-border-radius-topright: 3px; -webkit-border-top-right-radius: 5px; -webkit-border-top-left-radius: 5px;">
<h1 style="color: #333333; font: bold 22px Arial, Helvetica, sans-serif; margin: 0; display: block !important;">
<!-- To have a header image/logo replace the name below with your img tag -->
<!-- Email clients will render the images when the message is read so any image -->
<!-- must be made available on a public server, so that all recipients can load the image. -->
<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
</td>
</tr>
<tr>
<td bgcolor="#FFFFFF" style="font: normal 12px Arial, Helvetica, sans-serif; color:#333333; padding: 20px; -moz-border-radius-bottomleft: 4px; -moz-border-radius-bottomright: 4px; -webkit-border-bottom-right-radius: 5px; -webkit-border-bottom-left-radius: 5px;"><h3 style="margin: 10px 0 5px; font-size: 17px; font-weight: normal;">
tuning of JVM
</h3>
<span style="margin-bottom: 10px;">
created by <a href="http://community.jboss.org/people/mario.almeida">Mario Almeida</a> in <i>Performance Tuning</i> - <a href="http://community.jboss.org/message/562576#562576">View the full discussion</a>
</span>
<hr style="margin: 20px 0; border: none; background-color: #dadada; height: 1px;">
<div class="jive-rendered-content"><p>Hi All,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>OS CentOS 5.5 64bit</p><p>I am using JBOSS 4.2.3</p><p>JAVA 1.6u21</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>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</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>As per 'GARBAGE COLLECTION STATISTICAL ANALYSIS 201' below is the output of -verbose:gc</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><table border="0" cellspacing="0" frame="VOID" rules="NONE" style="width: 182px; height: 2006px;"><tbody><tr><td height="17" style="" width="55">Before</td><td style="" width="55">After</td><td style="" width="66">Time</td></tr><tr><td height="17" style="">67910</td><td style="">8160</td><td style="">0.01124</td></tr><tr><td height="17" style="">8160</td><td style="">7890</td><td style="">0.089276</td></tr><tr><td height="17" style="">138450</td><td style="">18307</td><td style="">0.01023</td></tr><tr><td height="17" style="">148867</td><td style="">31076</td><td style="">0.020333</td></tr><tr><td height="17" style="">84187</td><td style="">38918</td><td style="">0.020976</td></tr><tr><td height="17" style="">38918</td><td style="">38579</td><td style="">0.264469</td></tr><tr><td height="17" style="">169139</td><td style="">47306</td><td style="">0.010821</td></tr><tr><td height="17" style="">177866</td><td style="">55031</td><td style="">0.020886</td></tr><tr><td height="17" style="">185591</td><td style="">58003</td><td style="">0.017817</td></tr><tr><td height="17" style="">185363</td><td style="">61550</td><td style="">0.018758</td></tr><tr><td height="17" style="">172014</td><td style="">68685</td><td style="">0.024119</td></tr><tr><td height="17" style="">179149</td><td style="">74589</td><td style="">0.028192</td></tr><tr><td height="17" style="">178397</td><td style="">80153</td><td style="">0.022211</td></tr><tr><td height="17" style="">183961</td><td style="">82988</td><td style="">0.018935</td></tr><tr><td height="17" style="">189484</td><td style="">86900</td><td style="">0.013572</td></tr><tr><td height="17" style="">193396</td><td style="">88065</td><td style="">0.016476</td></tr><tr><td height="17" style="">191393</td><td style="">95872</td><td style="">0.009507</td></tr><tr><td height="17" style="">199296</td><td style="">100037</td><td style="">0.012184</td></tr><tr><td height="17" style="">205445</td><td style="">101781</td><td style="">0.007035</td></tr><tr><td height="17" style="">207189</td><td style="">102516</td><td style="">0.005844</td></tr><tr><td height="17" style="">209384</td><td style="">102951</td><td style="">0.003822</td></tr><tr><td height="17" style="">209831</td><td style="">104487</td><td style="">0.004506</td></tr><tr><td height="17" style="">212994</td><td style="">104022</td><td style="">0.004398</td></tr><tr><td height="17" style="">212630</td><td style="">104138</td><td style="">0.003814</td></tr><tr><td height="17" style="">216202</td><td style="">105215</td><td style="">0.004032</td></tr><tr><td height="17" style="">217279</td><td style="">105590</td><td style="">0.003863</td></tr><tr><td height="17" style="">222134</td><td style="">105791</td><td style="">0.005497</td></tr><tr><td height="17" style="">222335</td><td style="">106069</td><td style="">0.00365</td></tr><tr><td height="17" style="">227267</td><td style="">107093</td><td style="">0.003381</td></tr><tr><td height="17" style="">228373</td><td style="">107426</td><td style="">0.003942</td></tr><tr><td height="17" style="">233954</td><td style="">108218</td><td style="">0.004841</td></tr><tr><td height="17" style="">234746</td><td style="">108441</td><td style="">0.003837</td></tr><tr><td height="17" style="">239961</td><td style="">108776</td><td style="">0.003702</td></tr><tr><td height="17" style="">240296</td><td style="">109691</td><td style="">0.004393</td></tr><tr><td height="17" style="">245883</td><td style="">110735</td><td style="">0.005467</td></tr><tr><td height="17" style="">246927</td><td style="">113158</td><td style="">0.009279</td></tr><tr><td height="17" style="">254022</td><td style="">112053</td><td style="">0.007649</td></tr><tr><td height="17" style="">252917</td><td style="">112057</td><td style="">0.005108</td></tr><tr><td height="17" style="">257081</td><td style="">111999</td><td style="">0.004932</td></tr><tr><td height="17" style="">257023</td><td style="">113045</td><td style="">0.00562</td></tr><tr><td height="17" style="">261141</td><td style="">113898</td><td style="">0.005607</td></tr><tr><td height="17" style="">261994</td><td style="">114388</td><td style="">0.005883</td></tr><tr><td height="17" style="">265556</td><td style="">114417</td><td style="">0.004873</td></tr><tr><td height="17" style="">265585</td><td style="">115265</td><td style="">0.007753</td></tr><tr><td height="17" style="">268865</td><td style="">115827</td><td style="">0.007209</td></tr><tr><td height="17" style="">269427</td><td style="">116785</td><td style="">0.006272</td></tr><tr><td height="17" style="">272667</td><td style="">118328</td><td style="">0.006826</td></tr><tr><td height="17" style="">274232</td><td style="">118351</td><td style="">0.006551</td></tr><tr><td height="17" style="">276367</td><td style="">118402</td><td style="">0.005399</td></tr><tr><td height="17" style="">276418</td><td style="">120218</td><td style="">0.007433</td></tr><tr><td height="17" style="">279962</td><td style="">120963</td><td style="">0.009114</td></tr><tr><td height="17" style="">280707</td><td style="">119886</td><td style="">0.005476</td></tr><tr><td height="17" style="">280526</td><td style="">122200</td><td style="">0.008937</td></tr><tr><td height="17" style="">282840</td><td style="">124072</td><td style="">0.010552</td></tr><tr><td height="17" style="">284712</td><td style="">122330</td><td style="">0.006757</td></tr><tr><td height="17" style="">282970</td><td style="">123936</td><td style="">0.00912</td></tr><tr><td height="17" style="">285344</td><td style="">124890</td><td style="">0.009292</td></tr><tr><td height="17" style="">286298</td><td style="">124362</td><td style="">0.007613</td></tr><tr><td height="17" style="">286538</td><td style="">125830</td><td style="">0.009574</td></tr><tr><td height="17" style="">288006</td><td style="">126404</td><td style="">0.009543</td></tr><tr><td height="17" style="">289284</td><td style="">126641</td><td style="">0.009608</td></tr><tr><td height="17" style="">289521</td><td style="">128555</td><td style="">0.011272</td></tr><tr><td height="17" style="">291755</td><td style="">127926</td><td style="">0.009885</td></tr><tr><td height="17" style="">291126</td><td style="">129245</td><td style="">0.011053</td></tr><tr><td height="17" style="">292702</td><td style="">127820</td><td style="">0.008749</td></tr><tr><td height="17" style="">291404</td><td style="">128374</td><td style="">0.007936</td></tr><tr><td height="17" style="">291958</td><td style="">129143</td><td style="">0.007507</td></tr><tr><td height="17" style="">292727</td><td style="">129395</td><td style="">0.007756</td></tr><tr><td height="17" style="">293299</td><td style="">129869</td><td style="">0.007054</td></tr><tr><td height="17" style="">293773</td><td style="">130709</td><td style="">0.007014</td></tr><tr><td height="17" style="">294997</td><td style="">130884</td><td style="">0.007413</td></tr><tr><td height="17" style="">295172</td><td style="">131118</td><td style="">0.007388</td></tr><tr><td height="17" style="">295918</td><td style="">132533</td><td style="">0.007544</td></tr><tr><td height="17" style="">297333</td><td style="">132626</td><td style="">0.006971</td></tr><tr><td height="17" style="">297938</td><td style="">134040</td><td style="">0.008049</td></tr><tr><td height="17" style="">299352</td><td style="">134444</td><td style="">0.007505</td></tr><tr><td height="17" style="">300396</td><td style="">136355</td><td style="">0.010362</td></tr><tr><td height="17" style="">302307</td><td style="">136472</td><td style="">0.00994</td></tr><tr><td height="17" style="">302104</td><td style="">136633</td><td style="">0.008865</td></tr><tr><td height="17" style="">302227</td><td style="">137758</td><td style="">0.010389</td></tr><tr><td height="17" style="">303774</td><td style="">139274</td><td style="">0.010978</td></tr><tr><td height="17" style="">305290</td><td style="">139054</td><td style="">0.011067</td></tr><tr><td height="17" style="">304430</td><td style="">139612</td><td style="">0.011818</td></tr><tr><td height="17" style="">304988</td><td style="">140242</td><td style="">0.010733</td></tr><tr><td height="17" style="">305810</td><td style="">140619</td><td style="">0.010408</td></tr><tr><td height="17" style="">306187</td><td style="">141614</td><td style="">0.010614</td></tr><tr><td height="17" style="">307630</td><td style="">142919</td><td style="">0.012793</td></tr><tr><td height="17" style="">308935</td><td style="">144229</td><td style="">0.014377</td></tr><tr><td height="17" style="">308709</td><td style="">143014</td><td style="">0.011988</td></tr><tr><td height="17" style="">307494</td><td style="">144805</td><td style="">0.015654</td></tr><tr><td height="17" style="">309029</td><td style="">143489</td><td style="">0.011692</td></tr><tr><td height="17" style="">307713</td><td style="">143602</td><td style="">0.00943</td></tr><tr><td height="17" style="">307826</td><td style="">144560</td><td style="">0.009486</td></tr><tr><td height="17" style="">308784</td><td style="">145840</td><td style="">0.01116</td></tr><tr><td height="17" style="">310384</td><td style="">145356</td><td style="">0.009615</td></tr><tr><td height="17" style="">309900</td><td style="">146427</td><td style="">0.009441</td></tr><tr><td height="17" style="">311387</td><td style="">149017</td><td style="">0.011989</td></tr><tr><td height="17" style="">314009</td><td style="">147795</td><td style="">0.010213</td></tr><tr><td height="17" style="">312659</td><td style="">148303</td><td style="">0.009085</td></tr><tr><td height="17" style="">313167</td><td style="">150238</td><td style="">0.011596</td></tr><tr><td height="17" style="">315230</td><td style="">151294</td><td style="">0.014132</td></tr><tr><td height="17" style="">316286</td><td style="">150406</td><td style="">0.010096</td></tr><tr><td height="17" style="">315334</td><td style="">152324</td><td style="">0.012351</td></tr><tr><td height="17" style="">317252</td><td style="">152389</td><td style="">0.011761</td></tr><tr><td height="17" style="">317573</td><td style="">152533</td><td style="">0.012058</td></tr><tr><td height="17" style="">317717</td><td style="">152391</td><td style="">0.010228</td></tr><tr><td height="17" style="">318151</td><td style="">153109</td><td style="">0.010195</td></tr><tr><td height="17" style="">318869</td><td style="">153929</td><td style="">0.010222</td></tr><tr><td height="17" style="">319881</td><td style="">154847</td><td style="">0.010916</td></tr><tr><td height="17" style="">320799</td><td style="">156969</td><td style="">0.013489</td></tr><tr><td height="17" style="">322601</td><td style="">156607</td><td style="">0.013065</td></tr><tr><td height="17" style="">322239</td><td style="">158497</td><td style="">0.014829</td></tr><tr><td height="17" style="">323745</td><td style="">158842</td><td style="">0.014876</td></tr><tr><td height="17" style="">324090</td><td style="">158653</td><td style="">0.013889</td></tr><tr><td height="17" style="">323645</td><td style="">160475</td><td style="">0.016195</td></tr><tr><td height="17" style="">325467</td><td style="">162143</td><td style="">0.021307</td></tr><tr><td height="17" style="">324575</td><td style="">159037</td><td style="">0.014079</td></tr></tbody></table><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Even if I increase the heap size and adjust the NewSize to 1/3 I always get a rising graph.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>In the article it says Heap usage has stabilize with both the heap usage before collection and after collection forming horizontal lines</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>In my situation do I still have to increase the heap size more?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><a href="http://community.jboss.org/servlet/JiveServlet/showImage/2-562576-8468/heap.png"><span> http://community.jboss.org/servlet/JiveServlet/downloadImage/2-562576-8468/450-280/heap.png </span></a></p></div>
<div style="background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style="margin: 0;">Reply to this message by <a href="http://community.jboss.org/message/562576#562576">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in Performance Tuning at <a href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2078">Community</a></p>
</div></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</body>
</html>