“Is this expected” Yes. For each document, if there is any field with stored=true that does _not_ have docValues=true or is flagged as useDocValuesAsStored=false, there is 1> a disk seek to read the stored data from the fdt file 2> decompression of the data read in <1>, 16K block minimum.
So getting this all in 30 ms for 1,000 docs isn’t bad at all. If (and only if) _all_ the values you ask for are docValues=true and useDocValuesAsStored=true then all the values will be returned from the in-memory docValues data. Best, Erick > On Mar 2, 2019, at 1:12 AM, Venkat Kranthi Chalasani > <kranthi.chalas...@icloud.com.INVALID> wrote: > > Hi, > > I have an index of ~4M documents. My queries are running in 1-2ms but > fetching the top hits (~1000 documents) takes around 30ms. Is this expected? > > If it is, I was wondering if maintaining an application cache with docId as a > key is ok. I understand docIds are ephemeral as documents are added/deleted > but in our usage of lucene, we don’t add/delete documents. > > thanks > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
