Thank you for your answers. Antoine.
On Fri, Dec 2, 2011 at 2:08 AM, Shawn Heisey <s...@elyograg.org> wrote: > On 12/1/2011 8:01 AM, Antoine LE FLOC'H wrote: > >> Is there any difference in the way things are stored in the filterCache if >> I do >> >> &(fq=field1:val1 AND field2:val2) >> or >> &fq=field1:val&fq=field2:val2 >> >> eventhough these are logically identical ? What get stored exactly ? Also >> can you point me to where in the Solr source code this processing happens >> ? >> > > Your first example would result in one entry in filterCache, probably for > "+field1:val1 +field2:val2" which is what the parser ultimately reduces the > query to. Your second example will result in two separate entries in > filterCache. > > The second example takes more cache space, but it is also more reusable. > If you started with a clean cache and sent "&fq=field2:val2&field3:val3" > immediately after sending your second example, one of the filter queries > would be satisfied from the cache, so Solr would use fewer resources on the > query as a whole. If you sent your first example and then > "&fq=(field2:val2 AND field3:val3)" there would be no speedup from the > cache, because the new query wouldn't match the previous one at all. > > Thanks, > Shawn > >
