On Fri, Jul 31, 2009 at 5:06 PM, Stephen Duncan Jr<stephen.dun...@gmail.com> wrote: > I have a couple more questions on the FieldValueCache. I see that the > number of items in the cache is basically the number of multi-valued fields > facets have been requested for. What does each entry in the cache actually > contain? How does it's size grow as the number of total documents > increases?
It's basically an array of int[maxDoc] that contain the list of delta-coded vint values or optionally point out to shared byte arrays if the list of values don't fit in an int. See the javadoc for UnInvertedField for more details. > Ok, so that was the curiosity question. More critical: > > When we first ask for facets for multi-valued fields, it can take up to 25 > seconds to get the response, although after that it's very fast (1.5 seconds > or less even for a lot of different facets) since the FieldValueCache has > been populated. Obviously, we'd like to get the FieldValueCache populated, > hopefully without an end-user being the one to wait 25 seconds. I think > this is what the autowarming settings are about, but I'm not sure how to > warm the cache with the specific fields we expect facets to be requested > for. Any pointers? Use static warming queries. autowarming doesn't hit the fieldValueCache. -Yonik http://www.lucidimagination.com
