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RRD query period

 
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Hi All,

I am using rrd4j. I want to query rrd for specific time, but I found that I could not query rrd except some certain amount of Time.
For instance,

I created an rrd today at 11 am, which can store up to 1000 data at sampling rate of 5 seconds. That means it can store data for about 1 hour 23 minutes.
My question is for what duration can I query the rrd? what duration, before and after the creation of created rrd at 3 pm.
Or please give me an example to understand the concept. When I try to query rrd for more than a duration,it throws "java.lang.OutOfMemoryError: Java heap space" Exception.


Thanks and Regards,
Rudradutt Joshi.
 
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