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| - | === jmap (Heap Dump) === | + | <table border=3 cellspacing=3 cellpadding=3 align=center> |
| - | Using 'jmap', which is part of the JDK, you can run: | + | <tr> |
| + | <th>Command</th> | ||
| + | <th>Arguments</th> | ||
| + | <th>Description</th> | ||
| + | </tr> | ||
| + | <tr> | ||
| + | <td align=center rowspan=1>'''jmap''' ''(Heap Dump)''</td> | ||
| + | <td><font face=monospace>-dump:format=b,file=''filename'' process-id#</font></td> | ||
| + | <td>Dumps the memory map of the target process-ID# to an '''hprof file''' within the current directory (or specified directory if you expand upon ''filename'')</td> | ||
| + | </tr> | ||
| + | <tr> | ||
| + | <td align=center rowspan=2>'''jstack''' ''(Thread Dump)''</td> | ||
| + | <td><font face=monospace>-l process-id#</font></td> | ||
| + | <td>Prints long listing information (locks, synchronizers, etc.) on a specified process ID#</td> | ||
| + | </tr> | ||
| + | <tr> | ||
| + | <td><font face=monospace>-l -F process-id#</font></td> | ||
| + | <td>Force a stack dump when ''jstack'' isn't responding</td> | ||
| + | </tr> | ||
| + | </table> | ||
| - | '''jmap -dump:format=b,file='''''filename'' '''process-id#''' | + | * '''jmap''' - This command will then dump the memory map of the target process-id# to an hprof file within the current directory (or specified directory if you expand on 'filename'). |
| + | * '''jstack''' - This command will then take a thread dump of the java process specified and dump it to the console. You may want to consider redirecting this output to a file with the ''>'' modifier. | ||
| - | This command will then dump the memory map of the target process-id# to an hprof file within the current directory (or specified directory if you expand on 'filename'). | ||
| - | <br/> | ||
| - | === jstack (Thread Dump) === | ||
| - | Using 'jstack', which is part of the JDK, you can run: | ||
| - | '''jstack -l process-id#''' | ||
| - | '''jstack -F -l process-id#''' (if the process is hung) | ||
| - | This command will then take a thread dump of the java process specified and dump it to the console. You may want to consider redirecting this output to a file with the ''>'' modifier. | ||
| - | <br/> | ||
| = Windows = | = Windows = | ||
| This section lists methods to obtain fresh dumps on Windows-based platforms | This section lists methods to obtain fresh dumps on Windows-based platforms | ||
