[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15613881#comment-15613881
]
Erick Erickson commented on SOLR-4763:
--
Given Yonik's comments on SOLR-7036 and assuming that [~jimtronic] reports back
that Yonik's approach makes it so we can close SOLR-7036, should we close this
one too?
> Performance issue when using group.facet=true
> -
>
> Key: SOLR-4763
> URL: https://issues.apache.org/jira/browse/SOLR-4763
> Project: Solr
> Issue Type: Bug
>Affects Versions: 4.2
>Reporter: Alexander Koval
>Assignee: Erick Erickson
> Fix For: 5.5, 6.0
>
> Attachments: SOLR-4763.patch, SOLR-4763.patch, SOLR-4763.patch
>
>
> I do not know whether this is bug or not. But calculating facets with
> {{group.facet=true}} is too slow.
> I have query that:
> {code}
> "matches": 730597,
> "ngroups": 24024,
> {code}
> 1. All queries with {{group.facet=true}}:
> {code}
> "QTime": 5171
> "facet": {
> "time": 4716
> {code}
> 2. Without {{group.facet}}:
> * First query:
> {code}
> "QTime": 3284
> "facet": {
> "time": 3104
> {code}
> * Next queries:
> {code}
> "QTime": 230,
> "facet": {
> "time": 76
> {code}
> So I think with {{group.facet=true}} Solr doesn't use cache to calculate
> facets.
> Is it possible to improve performance of facets when {{group.facet=true}}?
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
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]
Ovidiu Mihalcea commented on SOLR-4763:
---
Would really need some good news with this. We really need result grouping
with faceting and this is really slowing our site... :(
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Assignee: Erick Erickson
Fix For: 5.3, Trunk
Attachments: SOLR-4763.patch, SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14602539#comment-14602539
]
Anh Hoang Tong commented on SOLR-4763:
--
I encountered the same problem when I faceted on some field docValues=false.
That query took about 1300 ms. But when I turn docValues=true for all fields I
want to facet. This time, it took only 140 ms. (I have about 500.000
documents). For me, this result is acceptable.
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Assignee: Erick Erickson
Fix For: 5.3, Trunk
Attachments: SOLR-4763.patch, SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
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]
Erick Erickson commented on SOLR-4763:
--
I may not get to this for a while, we need to reconcile this and 7036. If
anyone has spare cycles, I won't be offended by someone else doing the heavy
lifting ;)
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Assignee: Erick Erickson
Attachments: SOLR-4763.patch, SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
--
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14291888#comment-14291888
]
Jim Musil commented on SOLR-4763:
-
I submitted an alternative approach and patch to solve this problem:
https://issues.apache.org/jira/browse/SOLR-7036.
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Attachments: SOLR-4763.patch, SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
--
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14224845#comment-14224845
]
Adrien Brault commented on SOLR-4763:
-
[~thelabdude] Hey, are you still planning to work on this ?
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Assignee: Timothy Potter
Attachments: SOLR-4763.patch, SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
--
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14224888#comment-14224888
]
Timothy Potter commented on SOLR-4763:
--
haven't had a chance to review this yet ...
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Assignee: Timothy Potter
Attachments: SOLR-4763.patch, SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
--
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14113022#comment-14113022
]
Timothy Potter commented on SOLR-4763:
--
Going to review this in depth over the next couple of days and try to get it
committed soon.
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Assignee: Timothy Potter
Attachments: SOLR-4763.patch, SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
--
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
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]
Hua Jiang commented on SOLR-4763:
-
Hello, Varun. Thanks for your feedback.
I rebuild lucene_solr on my laptop, and every tests just pass. I made this
patch base on revision 1553089. If you are using a different revision, you may
have to do some modification yourself. I will explain the patch a little more,
and hope it helps.
In the unpatched code, the groupedFacetHits is a list of GroupedFacetHit
objects, which stores unique combinations of values of the group field and the
facet field in the previous segments. When a new segment is opened, this list
is traversed first to recalculate the segmentGroupedFacetsIndex, because that
value may differ from segment to segment. That's what the loop you mentioned in
the setNextReader() is doing.
During the the recalculation, the lookupTerm() method is invoked on
facetFieldTermsIndex and groupFieldTermsIndex. This method uses binary search
to lookup values among all the values that appears in the group/facet field in
the current segment.
Let's assume that we have D documents distributed in S segments. And the
docments are distributed evenly, so that we have G and F unique values in each
segment for the group and facet field, and that the length of the
groupedFacetHits list after the nth segment is processed is n*L. Then the
complexity of the recalculation is (logG + logF) * (L + 2L + ... + (S-1)L) ~
O((LogG + LogF)*L*S^2). It's proportion to S squared. As S grows, performance
drops rapidly.
In the patched version, I changed groupedFacetHits from a list to a set. So the
recalculation can be avoided, because when you get a GroupFacetHit, you just
add it the to set without worrying about that some other GroupFacetHit with the
same group and facet field values has been added before, because it is a set.
The add() method on a set will return false, when the same values is already
added.
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Attachments: SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14006822#comment-14006822
]
Varun Thacker commented on SOLR-4763:
-
I tried out the patch and SimpleFacetsTest.testSimpleGroupedFacets() fails.
Unless my understanding is incorrect, the patch seems to be incorrect.
This change does not affect anything. That is because this condition will
always be true -
{code}
- segmentTotalCount++;
- segmentFacetCounts[facetOrd]++;
-groupedFacetHits.add(new GroupedFacetHit(groupKey, null));
+if (groupedFacetHits.add(new GroupedFacetHit(groupKey, null))) {
+ segmentTotalCount++;
+ segmentFacetCounts[facetFieldNumTerms]++;
+}
{code}
The reason being the code will return if that segment does not have the
necessary values -
{code}
if (segmentGroupedFacetHits.exists(segmentGroupedFacetsIndex)) {
return;
}
{code}
Also I don't think removing the for loop in setNextReader() is correct. If you
add this back the test will pass.
I haven't looked into the MultiValued scenario yet but I feel that if it's a
caching issue the bug will be not at the lucene level. I'll look into it in
greater detail.
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
Attachments: SOLR-4763.patch, SOLR-4763.patch
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
--
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
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]
Daniel Bryant commented on SOLR-4763:
-
Hi all,
For anyone following this issue it is worth looking at an upcoming related fix
in Solr 4.6 https://issues.apache.org/jira/browse/SOLR-5027
We're just testing if this meets our requirements now.
Thanks to Charlie Hull from Flax for pointing us towards this!
Daniel
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
--
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
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]
Tom Burton-West commented on SOLR-4763:
---
I have similar problems with performance, but in my case memory use is an issue
as well. This is probably an extreme use case, but I thought it might be
helpful to add to the discussion.
We currently index close to 11 million books with the entire book being a Solr
document. We are considering instead indexing pages as the Solr document and
using grouping to return results organized by book.
I'm currently testing an index of about 1 million books indexed on a page
level, spread out over 3 shards. There are about 360 million pages. For a
worst-case query that returns about 200 million documents, group.truncate takes
about 10 seconds (which is acceptable for us as a worst-case). However,
group.facet takes closer to 15 minutes. We are running on a server with 74GB
of memory with 32GB dedicated to the JVM. What I see for this query with
group.facet is that memory use goes up above about 30GB and then multiple full
garbage collections occur.
In contrast, using normal rather than the worst case queries, our 90th
percentile queries (which return only a few million hits rather than 200
million) took about 700 ms with facet.truncate and 2000 ms with group.facet.
I'm wondering how much of the performance issues others are observing might be
due to memory requirements and slowdowns due to garbage collection.
Tom
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
--
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]
Daniel Bryant commented on SOLR-4763:
-
This is a major issue for me too. I have an index with 2 million documents, and
I query with five facet fields (each with 30+ groups)
if I set group.facet=false the query can take 2000ms on first run, but no more
than 250ms on subsequent execution
if I set group.facet=true it takes on average 18000ms on the first run, and the
same time on all subsequent runs (clearly indicating the cache is not being
used)
Could anyone in the Solr team indicate whether this is going to be fixed please?
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13680951#comment-13680951
]
Miriam C commented on SOLR-4763:
This bug leaves no choice but to choose between facets and groups.
Is This going to be fixed?
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13641883#comment-13641883
]
Otis Gospodnetic commented on SOLR-4763:
If you don't know if it's a bug or not it's best to bring it up on the mailing
list first, so devs don't have to manage invalid JIRA issues and so you can get
a better discussion (and help) going. I'm not sure if this a big or not.
Maybe [~martijn.v.groningen] will know.
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
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[jira] [Commented] (SOLR-4763) Performance issue when using group.facet=true
[
https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13641922#comment-13641922
]
Alexander Koval commented on SOLR-4763:
---
I'm sorry for that. I found 2 discussions in the mailing list:
http://lucene.472066.n3.nabble.com/Grouping-performance-problem-td3995245.html
http://lucene.472066.n3.nabble.com/group-facet-true-performances-td4021639.html
The solution has not been found.
I think with this issue it is not possible to use {{group.facet=true}} option
in production.
Performance issue when using group.facet=true
-
Key: SOLR-4763
URL: https://issues.apache.org/jira/browse/SOLR-4763
Project: Solr
Issue Type: Bug
Affects Versions: 4.2
Reporter: Alexander Koval
I do not know whether this is bug or not. But calculating facets with
{{group.facet=true}} is too slow.
I have query that:
{code}
matches: 730597,
ngroups: 24024,
{code}
1. All queries with {{group.facet=true}}:
{code}
QTime: 5171
facet: {
time: 4716
{code}
2. Without {{group.facet}}:
* First query:
{code}
QTime: 3284
facet: {
time: 3104
{code}
* Next queries:
{code}
QTime: 230,
facet: {
time: 76
{code}
So I think with {{group.facet=true}} Solr doesn't use cache to calculate
facets.
Is it possible to improve performance of facets when {{group.facet=true}}?
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