It's my laptop. 16gb, i7.. The collection size it's 5Mill objects (1,2GB) and it takes about 30sec. I have tried to execute the query with the same collection with and without indices with the same time results.
This is a test before to run in the real cluster with 6 nodes of 512Gb and 48cores each one. We tried to execute there with a real dataset(22M rows, 7gb) but it takes so long that query is aborted. 2017-05-08 12:12 GMT+02:00 Andrey Mashenkov <andrey.mashen...@gmail.com>: > Hi, > > Why do you think query is slow? > What its execution time? What is expected time? > How many nodes do you use? How much data does cache contains? > > On Mon, May 8, 2017 at 1:47 AM, Guillermo Ortiz <konstt2...@gmail.com> > wrote: > >> I have a simple cache where I have Person object (id, age and so on..) >> >> I have created indeces by id and age to try some examples but queries >> with "group by" go really slow. >> >> I'm trying this query: >> SELECT age >> FROM >> PersonWithindex >> group by age >> >> >> SELECT >> AGE AS __C0 >> FROM "personCacheWithIndex".PERSONWITHINDEX >> /* "personCacheWithIndex"."age_idx" */ >> GROUP BY AGE >> /* group sorted */ >> >> SELECT >> __C0 AS AGE >> FROM PUBLIC.__T0 >> /* "personCacheWithIndex"."merge_scan" */ >> GROUP BY __C0 >> >> Although it seems that it uses index, why is it going so slow? I think >> that it should be pretty fast with an index. >> > > > > -- > Best regards, > Andrey V. Mashenkov >
