First of all I wouldn’t worry about it unless you have a _significant_ number
of deleted docs. The default TMP as of around Solr 7.5 should accumulate up to
around 33% deleted docs. Prior to 7.5, the number of deleted docs could hover
around 50% depending on the access pattern.
expungeDeletes
We have 2 shards and 2 replicas in a testing environment.Deleted Docs are 18749
for one collection[documents].I have attached a screenshot of solr admin panel.
(1) Would there any impact on disk size if deleted docs will increase?
(2) We try to remove deleted doc by executing command : curl
ick Erickson <erickerick...@gmail.com>
> Sent: Wednesday 10th January 2018 22:41
> To: solr-user <solr-user@lucene.apache.org>
> Subject: Re: Very high number of deleted docs, part 2
>
> There's some background here:
> https://lucidworks.com/2017/10/13/segment-merging-d
geDeletes did not
do the job in testing
Surprising. What actually happened? Do note that expungeDeletes does not
promise to remove all deleted docs, it merges segments with < (some
percentage) deleted documents.
Best,
Erick
On Wed, Jan 10, 2018 at 9:45 AM, Markus Jelsma <markus.jel...@op
y 2018 17:56
> To: solr-user <solr-user@lucene.apache.org>
> Subject: Re: Very high number of deleted docs, part 2
>
> I'm not 100% sure that playing with maxSegments will work.
>
> what will work is to re-index everything. You can re-index into the
> existing collection,
w about optimizing it again, with maxSegments set to ten, it should
> recover right?
>
> -Original message-
> > From:Shawn Heisey <apa...@elyograg.org>
> > Sent: Friday 5th January 2018 14:34
> > To: solr-user@lucene.apache.org
> > Subject: Re: Very hig
: Friday 5th January 2018 14:34
> To: solr-user@lucene.apache.org
> Subject: Re: Very high number of deleted docs, part 2
>
> On 1/5/2018 5:33 AM, Markus Jelsma wrote:
> > Another collection, now on 7.1, also shows this problem and has default TMP
> > settings. Thi
, then there will never be a segment larger than 5GB, and the
deleted document percentage would be less likely to get out of control.
The optimize operation ignores the maximum segment size and reduces the
index to a single large segment with zero deleted docs.
TMP's behavior with really big segments
[1]
http://lucene.472066.n3.nabble.com/Very-high-number-of-deleted-docs-td4357327.html
notice or not is an open question. In an
> index with only 10 lakh docs, it's unlikely even having 50% deleted
> documents is going to make much of a difference.
>
> 3> Yes, the deleted docs are in segment until it's merged away. Lucene
> is very efficient (according to Mike McC
e deleted docs are in segment until it's merged away. Lucene
is very efficient (according to Mike McCandless) at skipping deleted
docs.
4> It rewrites all segments, purging deleted documents. However, it
has some pitfalls, see:
https://lucidworks.com/2017/10/13/segment-merging-deleted-documents-
Hi,
I am using atomic update to update one of the fields, I want to know :
1. if total docs in core are 10 lakh and I partially update 2 lakhs docs
then what will be the number of deleted docs?
2. Does higher number of deleted docs have affect on query time? means does
query time increases
Well, that made a difference! Now we're back at 64 MB per replica.
Thanks,
Markus
-Original message-
> From:Erick Erickson <erickerick...@gmail.com>
> Sent: Wednesday 4th October 2017 16:19
> To: solr-user <solr-user@lucene.apache.org>
> Subject: Re: Very hig
rgeMerge after the periodic update cycle, but
> i preferred Lucene to do it for me.
>
> Thanks,
> Markus
>
> -Original message-
>> From:Erick Erickson <erickerick...@gmail.com>
>> Sent: Wednesday 4th October 2017 14:56
>> To: solr-user <solr-
update cycle, but i
preferred Lucene to do it for me.
Thanks,
Markus
-Original message-
> From:Erick Erickson <erickerick...@gmail.com>
> Sent: Wednesday 4th October 2017 14:56
> To: solr-user <solr-user@lucene.apache.org>
> Subject: Re: Very high number of deleted doc
Ah thanks for that!
-Original message-
> From:Emir Arnautović <emir.arnauto...@sematext.com>
> Sent: Wednesday 4th October 2017 15:03
> To: solr-user@lucene.apache.org
> Subject: Re: Very high number of deleted docs
>
> Hi Markus,
> It is passed but not expl
is correct, you have to
either periodically optimize/forceMerge or expungeDeletes regularly.
At that point, though, you might as well optimize/forceMerge.
expungeDeletes would only save you re-writing segments with < 20%
deleted docs (at least I think that's the cutoff).
Or reindex from scratch and ne
onfig.
>
> Thanks,
> Markus
>
> -Original message-
>> From:Amrit Sarkar <sarkaramr...@gmail.com>
>> Sent: Wednesday 4th October 2017 14:42
>> To: solr-user@lucene.apache.org
>> Subject: Re: Very high number of deleted docs
>>
>> Hi Markus,
>&g
Did you _ever_ do a forceMerge/optimize or expungeDeletes?
Here's the problem TieredMergePolicy (TMP) has a maximum segment size
it will allow, 5G by default. No segment is even considered for
merging unless it has < 2.5G (or half whatever the default is)
non-deleted docs, the logic be
-Original message-
> From:Amrit Sarkar <sarkaramr...@gmail.com>
> Sent: Wednesday 4th October 2017 14:42
> To: solr-user@lucene.apache.org
> Subject: Re: Very high number of deleted docs
>
> Hi Markus,
>
> Emir already mentioned tuning *reclaimDeletesWeight w
; To: solr-user@lucene.apache.org
> Subject: Re: Very high number of deleted docs
>
> Hi Markus,
> You can set reclaimDeletesWeight in merge settings to some higher value than
> default (I think it is 2) to favor segments with deleted docs when merging.
>
> HTH,
> Emir
> -
Hi Markus,
Emir already mentioned tuning *reclaimDeletesWeight which *affects segments
about to merge priority. Optimising index time by time, preferably
scheduling weekly / fortnight / ..., at low traffic period to never be in
such odd position of 80% deleted docs in total index.
Amrit Sarkar
Hi Markus,
You can set reclaimDeletesWeight in merge settings to some higher value than
default (I think it is 2) to favor segments with deleted docs when merging.
HTH,
Emir
--
Monitoring - Log Management - Alerting - Anomaly Detection
Solr & Elasticsearch Consulting Support Training -
Hello,
Using a 6.6.0, i just spotted one of our collections having a core of which
over 80 % of the total number of documents were deleted documents.
It has configured with no
non-default settings.
Is this supposed to happen? How can i prevent these kind of numbers?
Thanks,
Markus
have observed is though merge
factor seems to work we always end up with around 6 lakh deleted docs in
index daily.
On optimizing all this deleted docs are removed. We benefit on memory as
well as query speed on optimization. But as I understand its a small time
gain and situation repeats itself
On 3/19/2015 12:24 AM, vicky desai wrote:
I fail to understand why this deleted docs are not removed from index on
merging. Is there a good documentation which explains how exactly is merging
done?
What can I do to solve this problem other than optimization?
Deleted docs *are* removed
bq: If this operation is continuously done I would end up with a large set of
deleted docs which will affect the performance of the queries I hit on this
solr.
No, you won't. They'll be merged away as background segments are merged.
Here's a great visualization of the process, the third one down
docs
merging is done after every 10th update and so the max Segment Count I can
have is 10 which is fine. However even when merging happens deleted docs are
not cleared and I end up with 100 deleted docs in index.
If this operation is continuously done I would end up with a large set of
deleted docs
and so the max Segment Count I can
have is 10 which is fine. However even when merging happens deleted docs are
not cleared and I end up with 100 deleted docs in index.
If this operation is continuously done I would end up with a large set of
deleted docs which will affect the performance
entries for deleted docs, so to filter
them out, one has to manually check livedocs. Is this the expected
behaviour? I don't understand why the cache would be bothering to load data
for deleted docs. This is on SOLR4.0
Thanks!
roman
, false);
the resulting arrays *will* contain entries for deleted docs, so to filter
them out, one has to manually check livedocs. Is this the expected
behaviour? I don't understand why the cache would be bothering to load data
for deleted docs. This is on SOLR4.0
Thanks!
roman
I understand that changes would be expensive, but shouldn't the cache
simply skip the deleted docs? In the same way as the cache for multivalued
fields (that accepts livedocs bits).
Thanks,
roman
On Wed, Nov 27, 2013 at 6:26 PM, Erick Erickson erickerick...@gmail.comwrote:
Yep, it's
Hello,
I am curious about the Deleted Docs: statistic on the solr/#/collection1
Overview page. Does Solr remove docs while indexing? I thought it only did
that when Optimizing, however my instance had 726 Deleted Docs, but then
after adding some documents that number decreased, eventually to 18
Krupansky
-Original Message-
From: Katie McCorkell
Sent: Tuesday, July 09, 2013 5:38 PM
To: solr-user@lucene.apache.org
Subject: Deleted Docs
Hello,
I am curious about the Deleted Docs: statistic on the solr/#/collection1
Overview page. Does Solr remove docs while indexing? I thought
On 7/9/2013 3:38 PM, Katie McCorkell wrote:
I am curious about the Deleted Docs: statistic on the solr/#/collection1
Overview page. Does Solr remove docs while indexing? I thought it only did
that when Optimizing, however my instance had 726 Deleted Docs, but then
after adding some documents
optimize ensures that deleted docs and terms will not be displayed.
-
Thanx:
Grijesh
www.gettinhahead.co.in
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Hi!
If a document with an unique id is added again, the new document is
added by deleting/marking the older doc as deleted. So when a search is
made with an IndexReader obtained from the IndexWriter (for NRT) both
the docs show up, the older doc and the newer updated doc. To prevent
the
commit would be the safest way for making sure the deleted content doesn't
show up.
Thanx
Pravesh
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On Wed, Dec 30, 2009 at 12:10 AM, Mohamed Parvez par...@gmail.com wrote:
Ditto. There should have been an DIH command to re-sync the Index with the
DB.
But there is such a command; it is called full-import.
--
Regards,
Shalin Shekhar Mangar.
Lance:
At times we dont have the freedom make these Database changes.
Currently I am in this situation. Hence the requirement on the DIH.
~Ravi.
On Sat, Jan 2, 2010 at 3:44 PM, Lance Norskog goks...@gmail.com wrote:
The other option is to have a 'deleted' column in your table, and
The other option is to have a 'deleted' column in your table, and have
the application 'delete' operation set that field. In the DIH you
query this column with 'deletedPkQuery'.
Or, you can use triggers to maintain a new table with the IDs of
deleted rows. This will allow you to have a batch job
Hi Shalin:
I get your point about not knowing what has been deleted from the
database. So this is what even I am looking for:
0) A document (id=100) is currently part of solr index.(
1) Lets say the application deleted a record with id=100 from database.
2) Now I need to execute
Ditto. There should have been an DIH command to re-sync the Index with the
DB.
Right now it looks like one way street form DB to Index.
On Tue, Dec 29, 2009 at 3:07 AM, Ravi Gidwani ravi.gidw...@gmail.comwrote:
Hi Shalin:
I get your point about not knowing what has been deleted
I am using Solr 1.4 and DIH to build the index from a table.
I use full import once to create the index and then i keep using delta
import to update the index.
All woks fine as long a the table gets added with only new rows.
if there are some rows in the table that get deleted then the index
Here's a couple more options:
http://stackoverflow.com/questions/1555610/solr-dih-how-to-handle-deleted-documents/
http://stackoverflow.com/questions/1555610/solr-dih-how-to-handle-deleted-documents/
Cheers,
Mauricio
On Mon, Dec 28, 2009 at 5:51 PM, Mohamed Parvez par...@gmail.com wrote:
I am
I have looked in the that thread earlier. But there is no option there for a
solution from Solr side.
I mean the two more options there are
1] Use database triggers instead of DIH to manage updating the index :-
This out of question as we cant run 1000 odd triggers every hour to delete.
2] Some
On Tue, Dec 29, 2009 at 3:03 AM, Mohamed Parvez par...@gmail.com wrote:
I have looked in the that thread earlier. But there is no option there for
a
solution from Solr side.
I mean the two more options there are
1] Use database triggers instead of DIH to manage updating the index :-
This
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