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https://issues.apache.org/jira/browse/SOLR-3816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13494105#comment-13494105
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Nagendra Nagarajayya commented on SOLR-3816:
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@Otis:
Yes, you could set to something low or 0, but this means it has to close and
open the SolrIndexSearcher this often. SolrIndexSearcher is a heavy object that
is reference counted so there may be searches going on, etc. has lots critical
areas that need to be synchronized to close and reopen a new searcher, warms it
up, etc.; was not meant for this kind of a use ...
Realtime-search just gets a new nrt reader from the writer and passes this
along to the Searcher, a lean searcher with no state. In the future if lucene's
developers make the reader more realtime so it sees more changes as they happen
at the writer realtime-search should be able to handle it ...
"Quote from the user using realtime-search"
Insertion speed – while we can’t really explain this, we are able to insert 70k
records per second at a steady rate over time with RA, while we can only do 40k
at a descending rate with normal Solr. Granted we haven’t even slightly
configured regular Solr for high speed insertion with regard to segment
configs, but this was good for us to get us quickly off the ground.
"end quote"
I think has gotten better with the 4.0 release. I have also requested the user
to benchmark and update the JIRA as I don't have the required hardware.
> Need a more granular nrt system that is close to a realtime system.
> -------------------------------------------------------------------
>
> Key: SOLR-3816
> URL: https://issues.apache.org/jira/browse/SOLR-3816
> Project: Solr
> Issue Type: Improvement
> Components: clients - java, replication (java), search,
> SearchComponents - other, SolrCloud, update
> Affects Versions: 4.0
> Reporter: Nagendra Nagarajayya
> Labels: nrt, realtime, replication, search, solrcloud, update
> Attachments: alltests_passed_with_realtime_turnedoff.log,
> SOLR-3816_4.0_branch.patch, SOLR-3816-4.x.trunk.patch,
> solr-3816-realtime_nrt.patch
>
>
> Need a more granular NRT system that is close to a realtime system. A
> realtime system should be able to reflect changes to the index as and when
> docs are added/updated to the index. soft-commit offers NRT and is more
> realtime friendly than hard commit but is limited by the dependency on the
> SolrIndexSearcher being closed and reopened and offers a coarse granular NRT.
> Closing and reopening of the SolrIndexSearcher may impact performance also.
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