Thanks Luc. I've created <a id="key-val" rel="97869" href="http://jira.pentaho.com/browse/MONDRIAN-1306" style="background-color:transparent;font-family:arial,FreeSans,Helvetica,sans-serif;font-size:1.167em;line-height:1.429;color:rgb(153,102,0)">MONDRIAN-1306</a> for this.<div class="gmail_extra">
<br><br><div class="gmail_quote">On Tue, Nov 20, 2012 at 11:31 AM, Luc Boudreau <span dir="ltr"><<a href="mailto:lucboudreau@gmail.com" target="_blank">lucboudreau@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I think you are right. Mondrian should use the "after GC" hook, else, it detects situations where the memory usage is high but the GC can still fix it.<br><br>Would you mind creating a Jira case?<br><br>Thanks for spotting this.<br>
<div class="gmail_extra"><br><br><div class="gmail_quote"><div><div class="h5">On Tue, Nov 20, 2012 at 9:56 AM, Matt Campbell <span dir="ltr"><<a href="mailto:mkambol@gmail.com" target="_blank">mkambol@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
<p>NotificationMemoryMonitor uses
MemoryPoolMXBean.setUsageThreshold() to define the memory threshold for triggering
a notification.<span> </span>Based on the javadoc for
MemoryPoolMXBean, I think usageThreshold <span> </span>is independent of whether GC has completed.<span> </span>There’s another threshold that takes GC into
account, though. <span> </span>MemoryPoolMXBean.setCollectionUsageThreshold()
specifies a threshold to be checked after recycling unused objects.</p>
<p>This blog post has a nice example of usage threshold vs.
collection usage threshold:<span> </span><a href="http://techblug.wordpress.com/2011/07/21/detecting-low-memory-in-java-part-2/" target="_blank">http://techblug.wordpress.com/2011/07/21/detecting-low-memory-in-java-part-2/</a></p>
<p>Is the intention with Mondrian memory monitoring to notify whenever
the memory threshold exceeded, or just post-garbage collection?</p>
<p> </p>
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