On 6/18/2014 10:57 AM, Benjamin Wiens wrote: > Thanks Erick! > So let's say I have a config of > > <filterCache > class="solr.FastLRUCache" > size="10000" > initialSize="10000" > autowarmCount="5000"/> > > MaxDocuments = 1,000,000 > > So according to your formula, filterCache should roughly have the potential > to consume this much RAM: > ((1,000,000 / 8) + 128) * (10,000) = 1,251,280,000 byte / 1,000 = > 1,251,280 kb / 1,000 = 1,251.28 mb / 1000 = 1.25 gb
Yes, this is essentially correct. If you want to arrive at a number that's more accurate for the way that OS tools will report memory, you'll divide by 1024 instead of 1000 for each of the larger units. That results in a size of 1.16GB instead of 1.25. Computers think in powers of 2, dividing by 1000 assumes a bias to how people think, in powers of 10. It's the same thing that causes your computer to report 931GB for a 1TB hard drive. Thanks, Shawn
