Lucene query with sorting. Performance problem

[Etienne Crinier]

Hi,

I have a 'fulltext lucene' index to do a quick search on multiple fields.
It is working properly.
Now i would like to sort these results through a numeric field. Therefore,
I created a 'notunique' index to this field.
You can find below my request :
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk' order
by relevance desc*

Without the "order by" method performance is good: explainwithoutorderby.jpg

Now with "order by": explainwithoutorderby.jpg


You can see the order by index unused. Performance decreases dramatically.

Do you have any idea on how to solve this issue?

[Enrico Risa]

Hi Etienne

can you try to remove the not unique index
and paste here the explain of

*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk' order
by relevance desc*


Thanks

Enrico

Post by Etienne Crinier
Hi,
I have a 'fulltext lucene' index to do a quick search on multiple fields.
It is working properly.
Now i would like to sort these results through a numeric field. Therefore,
I created a 'notunique' index to this field.
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
explainwithoutorderby.jpg
Now with "order by": explainwithoutorderby.jpg
You can see the order by index unused. Performance decreases dramatically.
Do you have any idea on how to solve this issue?
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[Etienne Crinier]

Hi,

Thank you for your answer. In attachment, the result of explain without
index

Thanks

Post by Enrico Risa
Hi Etienne
can you try to remove the not unique index
and paste here the explain of
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
Thanks
Enrico

Post by Etienne Crinier
Hi,
I have a 'fulltext lucene' index to do a quick search on multiple fields.
It is working properly.
Now i would like to sort these results through a numeric field.
Therefore, I created a 'notunique' index to this field.
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
explainwithoutorderby.jpg
Now with "order by": explainwithoutorderby.jpg
You can see the order by index unused. Performance decreases dramatically.
Do you have any idea on how to solve this issue?
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[Mohammad Hossein Ganjyar]

I have this problem with orientdb v2.2.31. I have vertex Users with
properties id (no index), name (lucene index), family(lucene index).
My quesry is :
SELECT @rid, name , family FROM profiles
order by name asc
limit 10
This query is very slow (exc in ~17 seconds).
Do you best idea?
thanks

Post by Enrico Risa
Hi Etienne
can you try to remove the not unique index
and paste here the explain of
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
Thanks
Enrico

Post by Etienne Crinier
Hi,
I have a 'fulltext lucene' index to do a quick search on multiple fields.
It is working properly.
Now i would like to sort these results through a numeric field.
Therefore, I created a 'notunique' index to this field.
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
explainwithoutorderby.jpg
Now with "order by": explainwithoutorderby.jpg
You can see the order by index unused. Performance decreases dramatically.
Do you have any idea on how to solve this issue?
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[Luigi Dell'Aquila]

Hi Mohammad,

Lucene indexes do not provide ordering (or better, they return results
based on their score, but it's not what you need).
What you can do here is define an additional NOTUNIQUE index on "name",
this will do the job

Thanks

Luigi

2018-03-31 23:45 GMT+02:00 Mohammad Hossein Ganjyar <

Post by Mohammad Hossein Ganjyar
I have this problem with orientdb v2.2.31. I have vertex Users with
properties id (no index), name (lucene index), family(lucene index).
order by name asc
limit 10
This query is very slow (exc in ~17 seconds).
Do you best idea?
thanks

Post by Enrico Risa
Hi Etienne
can you try to remove the not unique index
and paste here the explain of
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
Thanks
Enrico

Post by Etienne Crinier
Hi,
I have a 'fulltext lucene' index to do a quick search on multiple
fields. It is working properly.
Now i would like to sort these results through a numeric field.
Therefore, I created a 'notunique' index to this field.
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
explainwithoutorderby.jpg
Now with "order by": explainwithoutorderby.jpg
You can see the order by index unused. Performance decreases
dramatically.
Do you have any idea on how to solve this issue?
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Groups "OrientDB" group.
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[Etienne Crinier]

Hi,

I upgraded my orientdb version to 2.0-M1 and lucene plugin and that's
working fine and fast.
Thanks

Post by Etienne Crinier
Hi,
I have a 'fulltext lucene' index to do a quick search on multiple fields.
It is working properly.
Now i would like to sort these results through a numeric field. Therefore,
I created a 'notunique' index to this field.
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
explainwithoutorderby.jpg
Now with "order by": explainwithoutorderby.jpg
You can see the order by index unused. Performance decreases dramatically.
Do you have any idea on how to solve this issue?

['Curtis Mosters' via OrientDB]

@Etienne: what happens if you search for "?

Does it brake your system too? Or is it fine for you?

Post by Etienne Crinier
Hi,
I upgraded my orientdb version to 2.0-M1 and lucene plugin and that's
working fine and fast.
Thanks

Post by Etienne Crinier
Hi,
I have a 'fulltext lucene' index to do a quick search on multiple fields.
It is working properly.
Now i would like to sort these results through a numeric field.
Therefore, I created a 'notunique' index to this field.
*select from Tracks [Title, ArtistName, AlbumName] LUCENE 'daft+punk'
order by relevance desc*
explainwithoutorderby.jpg
Now with "order by": explainwithoutorderby.jpg
You can see the order by index unused. Performance decreases dramatically.
Do you have any idea on how to solve this issue?