White holes in xymon graphs

I too have seen these white holes and have not figured out a pattern.  I was getting errors in my rrd-status log about the time used to updates items, but for some reason that message stopped 15 days ago.  I am running 4.3.0-0.beta2

 
    .....Bruce

 
  Bruce White
 Senior Enterprise Systems Engineer | Phone: XXX-XXX-XXXX | Fax: XXX-XXX-XXXX | user-58f975e8bf9d@xymon.invalid | http://www.fellowes.com/
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From: Hermann-Josef Beckers [mailto:user-3e5362deca72@xymon.invalid] Sent: Tuesday, January 19, 2010 9:13 AM
To: user-ae9b8668bcde@xymon.invalid
Subject: [hobbit] White holes in xymon graphs

 
Hi, 
can anyone explain those (white) blackouts in the attached xymon graph? I see no messages neither in the client nor in the server logs.Those blackouts happen at different times:The duration is ~ 10 minutes = 2 intervalls? 
Any hints? hjb 
[Anhang "hobbithole2.pdf" gelöscht von Hermann-Josef Beckers/Kreis-Steinfurt]