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From Benjamin Wiens <>
Subject Calculating filterCache size
Date Wed, 18 Jun 2014 15:00:04 GMT
I'm looking for a formula to calculate filterCache size in the RAM.

The best estimation I can find is here

An index of 1.000.000 would thus take 12,5 GB in the RAM with this formula: bit / 8 (to byte) / 1000 (to kb) / 1000 (to mb) / 1000 (to
gb) = 12,5 GB

Can anyone confirm this formula? I am aware that if the result of the
filter query is low, it can just create something else which take up less

I know I can just start with a low filterCache size and kick it up in my
environment, but I'd like to come up with a scientific formula.


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