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From Pouria Pirzadeh <>
Subject Re: Indexes not performing well
Date Thu, 26 May 2016 16:20:32 GMT
Hi Magnus,

Thanks for your email and sharing the information.
If it is Ok with you, Would you please share with us the exact DDL
(including type definitions, dataset and index definitions) and exact AQL
queries that you ran against AsterixDB ?
I am just interested in checking the query plans and see what ended up
being run as jobs.


On Thu, May 26, 2016 at 4:59 AM, Magnus Kongshem <>

> Hi,
> There has been a lot of questions from me regarding AsterixDB and I thank
> all of you who have answered me. So it is time for me to contribute with
> some obeservations. I am writing my master thesis where I test multiple
> databases on a large data set. I should also mention that I have installed
> AsterixDB on a single machine.
> What I have observed is that asterixDB has a "poorer" read performance
> when I specify indexes on the data set compared to not implementing any
> indexes. See the attachment for details, its an excerpt of my thesis
> explaining and describing the queries, the indexes and the test results.
> Any thoughts on these test results?
> I also cannot help to notice that the read performance for a query
> querying a small portion, medium portion and large portion of the data set
> is very similar. The largest query finds 75 million records and the
> smallest query finds 3.5 million records, but almost have the same read
> performance. How can this be?
> Perhaps you can use these test results in the future development of
> asterixDB.
> I you would like, I can send you my final thesis when it's done.
> --
> Mvh
> Magnus Alderslyst Kongshem
> +47 415 65 906

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