Specifying the retention period

[Rahul Amaram]

Hi,
I am trying to setup the bischeck plugin for our organization. I have 
configured most part of it except for the cache retention period. Here 
is what I want - I want to store every value which has been generated 
during the past 1 month. The reason being my threshold is currently 
calculated as the average of the metric value during the past 4 weeks at 
the same time of the day.

So, how do I define the cache template for this? If I don't define any 
cache template, for how many days is the data kept?
Also, how does the aggregrate function work and and what does the purge 
Maxitems signify?

I've gone through the documentation but it wasn't clear. Looking forward 
to a response.

Bischeck is one awesome plugin. Keep up the great work.

Regards,
Rahul.

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