Hi, Solr Developer
Thanks very much for your timely reply.
1. I'm sorry, I have made a mistake, the total number of documents is 32
Million, not 320 Million.
2. The system memory is large for solr index, OS total has 256G, I set the
solr tomcat HEAPSIZE="-Xms25G -Xmx100G"
-How many fields are you faceting on?
Reply: 9 fields I facet on.
- How many unique values does your facet fields have (approximately)?
Reply: 3 facet fields have one hundred unique values, other 6 facet fields'
unique values are between 3 to 15.
- What is the content of your facets (Strings, numbers?)
Reply: 9 fields are all numbers.
- Which facet.method do you use?
Reply: Used the default facet.method=fc
And we test this scenario: If the number of facet fields' unique values is
less we add facet.method=enum, there is a little to improve performance.
- What is the response time with faceting and a few thousand hits?
Reply: <result name="response" numFound="2925" start="0">
QTime is <int name="QTime">6</int>
Best Regards,
Alice Yang
+86-021-51530666*41493
Floor 19,KaiKai Plaza,888,Wanhandu Rd,Shanghai(200042)
-----Original Message-----
From: Toke Eskildsen [mailto:t...@statsbiblioteket.dk]
Sent: Friday, May 23, 2014 8:08 PM
To: d...@lucene.apache.org
Subject: Re: (Issue) How improve solr facet performance
On Fri, 2014-05-23 at 11:45 +0200, Alice.H.Yang (mis.cnsh04.Newegg)
41493 wrote:
> We are blocked by solr facet performance when query hits many
> documents. (about 10,000,000)
[320M documents, immediate response for plain search with 1M hits]
> But when we add several facet.field to do facet ,QTime increaseto
> 220ms or more.
It is not clear whether your observation of increased response time is due to
many hits or faceting in itself.
- How many fields are you faceting on?
- How many unique values does your facet fields have (approximately)?
- What is the content of your facets (Strings, numbers?)
- Which facet.method do you use?
- What is the response time with faceting and a few thousand hits?
> Do you have some advice on how improve the facet performance when hit
> many documents.
That depends on whether your bottleneck is the hitcount itself, the number of
unique facet values or something third like I/O.
- Toke Eskildsen, State and University Library, Denmark
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