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| <head> |
| <title>Memory Snapshot Comparison</title> |
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| <p><a id="MemoryDiff.HelpCtx" name="MemoryDiff.HelpCtx"></a></p> |
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| <h1>Memory Snapshot Comparison</h1> |
| <a name="BEGIN" id="BEGIN"></a> |
| <p>Use to display a comparison of two memory snapshots. |
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| <p><b>Sampling Comparison</b></p> |
| <p>If the <b>Quick (Sampled)</b> option was selected for the profiling session, the comparison provides details on the difference between the number of live objects in the two snapshots.</p> |
| |
| <table summary="Description of sampling comparison results in Memory Snapshot Comparison window." dir="ltr" border="1" width="100%" frame="hsides" rules="groups" cellpadding="3" cellspacing="0"> |
| <col width="34%" /> |
| <col width="*" /> |
| <thead> |
| <tr align="left" valign="top"> |
| <th align="left" valign="bottom" id="r1c1-t27">Element</th> |
| <th align="left" valign="bottom" id="r1c2-t27">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr align="left" valign="top"> |
| <td align="left" id="r2c1-t27" headers="r1c1-t27"> |
| <p>Class Name - Live Objects</p> |
| </td> |
| <td align="left" headers="r2c1-t27 r1c2-t27">Displays the name of the class or live object.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t27" headers="r1c1-t27"> |
| <p>Live Bytes [%]</p> |
| </td> |
| <td align="left" headers="r3c1-t27 r1c2-t27">Provides a graphic display of the relative amount of memory currently occupied by the live object.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r4c1-t27" headers="r1c1-t27"> |
| <p>Live Bytes</p> |
| </td> |
| <td align="left" headers="r4c1-t27 r1c2-t27">Displays the memory size in bytes that is currently occupied by the live object.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r5c1-t27" headers="r1c1-t27"> |
| <p>Live Objects</p> |
| </td> |
| <td align="left" headers="r5c1-t27 r1c2-t27">Displays the exact difference between the number of live objects in the two snapshots.</td> |
| </tr> |
| </tbody> |
| </table> |
| <br /> |
| <!-- --> |
| <p><b>Allocations Comparison</b></p> |
| <p>If <b>Record object creation</b> was selected for the profiling session, the comparison provides details on the total number of instances.</p> |
| |
| <table summary="Description of allocations comparison results in Memory Snapshot Comparison window." dir="ltr" border="1" width="100%" frame="hsides" rules="groups" cellpadding="3" cellspacing="0"> |
| <col width="34%" /> |
| <col width="*" /> |
| <thead> |
| <tr align="left" valign="top"> |
| <th align="left" valign="bottom" id="r1c1-t28">Element</th> |
| <th align="left" valign="bottom" id="r1c2-t28">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr align="left" valign="top"> |
| <td align="left" id="r2c1-t28" headers="r1c1-t28"> |
| <p>Class Name - Allocated Objects</p> |
| </td> |
| <td align="left" headers="r2c1-t28 r1c2-t28">Displays the name of the class or allocated object.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t28" headers="r1c1-t28"> |
| <p>Bytes Allocated [%]</p> |
| </td> |
| <td align="left" headers="r3c1-t28 r1c2-t28">Provides a graphic display of the relative amount of memory occupied by instances of the class.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r4c1-t28" headers="r1c1-t28"> |
| <p>Bytes Allocated</p> |
| </td> |
| <td align="left" headers="r4c1-t28 r1c2-t28">Displays the memory size in bytes occupied by the instances of the class.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r5c1-t28" headers="r1c1-t28"> |
| <p>Objects Allocated</p> |
| </td> |
| <td align="left" headers="r5c1-t28 r1c2-t28">Displays the number of all instances of the class.</td> |
| </tr> |
| </tbody> |
| </table> |
| <br /> |
| <!-- --> |
| <p><b>Liveness Comparison</b></p> |
| <p>If <b>Record both object creation and garbage collection</b> was selected for the profiling session, the comparison provides more detailed data on live instances.</p> |
| |
| <table summary="Description of liveness comparison results in Memory Snapshot Comparison window." dir="ltr" border="1" width="100%" frame="hsides" rules="groups" cellpadding="3" cellspacing="0"> |
| <col width="34%" /> |
| <col width="*" /> |
| <thead> |
| <tr align="left" valign="top"> |
| <th align="left" valign="bottom" id="r1c1-t29">Element</th> |
| <th align="left" valign="bottom" id="r1c2-t29">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr align="left" valign="top"> |
| <td align="left" id="r2c1-t29" headers="r1c1-t29"> |
| <p>Class Name - Allocated Objects</p> |
| </td> |
| <td align="left" headers="r2c1-t29 r1c2-t29">Displays the name of the class or allocated object.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t29" headers="r1c1-t29"> |
| <p>Live Bytes [%]</p> |
| </td> |
| <td align="left" headers="r3c1-t29 r1c2-t29">Provides a graphic display of the relative amount of memory occupied by live instances of the class.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r4c1-t29" headers="r1c1-t29"> |
| <p>Live Bytes</p> |
| </td> |
| <td align="left" headers="r4c1-t29 r1c2-t29">Displays the memory size in bytes that is currently occupied by the live instances of the class.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r5c1-t29" headers="r1c1-t29"> |
| <p>Live Objects</p> |
| </td> |
| <td align="left" headers="r5c1-t29 r1c2-t29">Displays the number of current live instances of the class.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r6c1-t29" headers="r1c1-t29"> |
| <p>Allocated Objects</p> |
| </td> |
| <td align="left" headers="r6c1-t29 r1c2-t29">Displays the number of all instances of the class created since the application was started or since the results were last reset.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r7c1-t29" headers="r1c1-t29"> |
| <p>Average Age</p> |
| </td> |
| <td align="left" headers="r7c1-t29 r1c2-t29">Displays the average age in generations of live instances of the class.</td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r8c1-t29" headers="r1c1-t29"> |
| <p>Generations</p> |
| </td> |
| <td align="left" headers="r8c1-t29 r1c2-t29">Displays the number of different generations (garbage collections survived) of live instances of the class.</td> |
| </tr> |
| </tbody> |
| </table> |
| <br /> |
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| <hr><p><b>Related Topics</b></p> |
| <p><i>Developing Applications with NetBeans IDE</i>, |
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