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<p class=MsoNormal align=center style='text-align:center'><b><span
style='font-size:18.0pt'>IBM® HeapAnalyzer</span></b></p>
<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:18.0pt'> </span></p>
<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:18.0pt'> </span></p>
<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:18.0pt'>IBM HeapAnalyzer Creator/Architect/Developer</span></p>
<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:18.0pt'>Jinwoo Hwang</span></p>
<p align=center style='margin:0in;margin-bottom:.0001pt;text-align:center'>jinwoo@us.ibm.com</p>
<p style='margin:0in;margin-bottom:.0001pt'> </p>
<p style='margin:0in;margin-bottom:.0001pt'>Welcome to IBM HeapAnalyzer. IBM
HeapAnalyzer allows the finding of a possible Java™ heap leak area
through its heuristic search engine and analysis of the Java heap dump in Java
applications. You can find more information at
http://www.alphaworks.ibm.com/tech/heapanalyzer</p>
<p style='margin:0in;margin-bottom:.0001pt'> </p>
<p style='margin:0in;margin-bottom:.0001pt'><b><span style='font-size:20.0pt'>Introduction</span></b></p>
<p>The Heapdump contains a list of all the objects that are in the heap.</p>
<p>Heapdumps can be very large with millions of items in them. </p>
<p>It's not always easy to analyze a large file. This tool analyzes heapdumps
of Java SDK 1.3.1,1.4.x, 5.0 and 6.0</p>
<p>IBM HeapAnalyzer is provided “as-is”.</p>
<p>Supported features of IBM HeapAnalyzer are ported to MDD4J which is
available in IBM Support Assistant (<a
href="http://www-306.ibm.com/software/support/isa/">http://www-306.ibm.com/software/support/isa/</a>).
MDD4J is an incorporation of IBM HeapAnalyzer and other IBM Java heap analysis
tools.</p>
<p style='margin:0in;margin-bottom:.0001pt'><b><span style='font-size:20.0pt'>Prerequisite</span></b></p>
<p style='margin-left:.5in;text-indent:-.25in'><span style='font-family:Symbol'>·</span><span
style='font-size:7.0pt'> </span>Java Runtime
Environment 5 or higher<br>
<br>
The following exception will be thrown if older version of Java virtual machine
is used:<br>
Exception in thread "main" java.lang.NoClassDefFoundError:
java/util/regex/PatternSyntaxException</p>
<p> </p>
<p><b><span style='font-size:20.0pt'>Definitions</span></b></p>
<p style='margin-top:5.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:
.5in;text-indent:-.25in'><span style='font-family:Symbol'>·</span><span
style='font-size:7.0pt'> </span><b>Root
object</b> An object for which no (different) object holds a reference.</p>
<p style='margin-top:5.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:
.5in;text-indent:-.25in'><span style='font-family:Symbol'>·</span><span
style='font-size:7.0pt'> </span><b>Parent
object</b> An object (for example, A) that holds at least one reference to some<br>
(different) object (for example, B). In this case, A is said to be the parent
of B.</p>
<p style='margin-top:5.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:
.5in;text-indent:-.25in'><span style='font-family:Symbol'>·</span><span
style='font-size:7.0pt'> </span><b>Owner
object</b> If an object has more than one parent object, a parent object is
chosen as owner object. <br>
Total size is calculated only with owner objects.</p>
<p style='margin-top:5.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:
.5in;text-indent:-.25in'><span style='font-family:Symbol'>·</span><span
style='font-size:7.0pt'> </span><b>Child
object</b> An object (for example, B) for which at least one (different) object<br>
(for example, A) holds a reference. In this case B is said to be the child of
A. </p>
<p style='margin-top:5.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:
.5in;text-indent:-.25in'><span style='font-family:Symbol'>·</span><span
style='font-size:7.0pt'> </span><b>Type </b>Collection
of same objects</p>
<p style='margin-top:5.0pt;margin-right:0in;margin-bottom:12.0pt;margin-left:
.5in;text-indent:-.25in'><span style='font-family:Symbol'>·</span><span
style='font-size:7.0pt'> </span><b>Size</b>
The size of an object is the amount of memory that is required to hold that
object in memory.</p>
<p style='margin-left:.5in;text-indent:-.25in'><span style='font-family:Symbol'>·</span><span
style='font-size:7.0pt'> </span><b>Total
size </b>The subtree size of an object is the sum of i
IBM® HeapAnalyzer ha39
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是嘟嘟啊2012-06-27想用自己的机器分析太难了，换了太小型机才分析成功的。工具可用。
wangshengmao1232012-02-14倒是能使用，就是太耗内存了- phoenix_nova2014-03-02工具没问题，只是比较耗资源。anyway，感谢楼主提供。
- lyjfriends22018-09-08还可以，使用比较方便。
