51 lines
4.2 KiB
HTML
51 lines
4.2 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Java garbage collection performance considerations" />
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<meta name="abstract" content="Garbage collection on the iSeries Java virtual machine operates in a continuous asynchronous mode. The garbage collection-initial size (GCHINL) parameter on the Run Java (RUNJVA) command may affect application performance." />
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<meta name="description" content="Garbage collection on the iSeries Java virtual machine operates in a continuous asynchronous mode. The garbage collection-initial size (GCHINL) parameter on the Run Java (RUNJVA) command may affect application performance." />
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<meta name="DC.Relation" scheme="URI" content="gc.htm" />
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<meta name="DC.Relation" scheme="URI" content="advgc.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="gcperf" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Java garbage collection performance considerations</title>
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</head>
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<body id="gcperf"><a name="gcperf"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Java garbage collection performance considerations</h1>
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<div><p>Garbage collection on the iSeries™ Java™ virtual machine operates in a continuous
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asynchronous mode. The garbage collection-initial size (GCHINL) parameter
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on the Run Java (RUNJVA) command may affect application performance. </p>
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<p>The GCHINL parameter specifies the amount of new object space that is allowed
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between garbage collections. A small value may cause too much garbage collection
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overhead. A large value may limit garbage collection and cause out of memory
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errors. However, for most applications, the default values should be correct.</p>
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<p>Garbage collection determines that an object is no longer needed by evaluating
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whether there are any valid references to that object.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="gc.htm" title="Garbage collection is the process of freeing storage that is used by objects that are no longer referred to by a program. With garbage collection, programmers no longer have to write error prone code to explicitly "free" or "delete" their objects. This code frequently results in "memory leak" program errors. The garbage collector automatically detects an object or group of objects that the user program can no longer reach. It does this because there are no references to that object in any program structure. Once the object has been collected, you can allocate the space for other uses.">Java garbage collection</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="advgc.htm" title="The IBM Developer Kit for Java implements an advanced garbage collector algorithm. This algorithm allows the discovery and collection of unreachable objects without significant pauses in the operation of the Java program. A concurrent collector cooperatively discovers the references to objects under the running threads, instead of a single thread.">IBM Developer Kit for Java advanced garbage collection</a></div>
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</div>
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</div>
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</body>
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</html>
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