-Xverbose:memdbg and compaction

Hi<br>
<br>
I run app with <br>
-XXsetGC:genparpar -Xmx=64M -Xms64M -Xns=1600K -Xverbose:memdbg -Xgcpause -Xgcreport -XXcompactratio=25 <br>
<br>
and found in logs<br>
<i>
[memdbg ] Compacting 32 heap parts at index 24 (type 1) (exceptional 0) <br>
[memdbg ] Compacting 116 heap parts at index 12 (type 2) (exceptional 1) <br>
</i>
<br>
I understand, that
<ul>
<li> "32 heap parts" is a length of the compacting window
<li> "index 12" points out the beggining of this window
</ul>
but what "type" and "exceptional" mean ? <br>
<br>
BTW is there a document, that describes meaning of such logs ? ("Guide to command line options" contains only examples without any explanation)
<br>
<br>
regards <br>
lukasz

Hi Lukasz,
The memdbg option is as the name implies intended for debugging of the JVM and the actual printouts change between JRockit releases. It is intentionally undocumented.
With the release of JRockit R27.1 we will release a diagnostics guide with more detail than the current docs. You can expect coverage of some of the Xverbose options in this guide moving forward (but probably not memdbg).
Regards,
Henrik

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