> > ((valid_from:[* TO 2010-04-29T10:34:12Z]) AND > > (valid_till:[2010-04-29T10:34:12Z TO *])) OR ((*:* > > -valid_from:[* TO *]) AND (*:* -valid_till:[* TO *]))) > > > > I use the empty checks for datasets which do not have a > > valid from/till range. > > > > > > Is there any way to get this any faster? > > I can suggest you two things. > > 1-) valid_till:[* TO *] and valid_from:[* TO *] type queries can be > performance killer. You can create a new boolean field ( populated via > conditional copy or populated client side) that holds the information > whether valid_from exists or not. So that valid_till:[* TO *] can be > rewritten as valid_till_bool:true.
That may be an idea, however i checked what happens when I simply leave them out. It does affect the performance but the query is still somewhere around 1 second. > 2-) If you are embedding these queries into q parameter, you can write > your clauses into (filter query) fq parameters so that they are cached. The problem here is, that the timestamp itself does change quite a bit and hence cannot be properly cached. It could be for a few seconds, but occasional response times of more than a second is still unacceptable for us. We need a solution that responds quickly ALL the time, not just most of the time. Thanks for your ideas though :) regards, Jan-Simon
