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https://issues.apache.org/jira/browse/SOLR-13350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17814975#comment-17814975
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Ishan Chattopadhyaya commented on SOLR-13350:
---------------------------------------------

Same 20k queries as above:

1 user thread at a time, 6 search executor threads at a time:
{code}
50th=5.1998165,
90th=8.449806,
95th=10.191322700000002,
mean=29.829016496896898,
total-queries=19980,
total-time=678569
{code}

6 user threads at a time, 1 search executor threads at a time:
{code}
50th=92.90819300000001,
90th=378.8129378,
95th=575.1936470000003,
mean=200.04457501921922,
total-queries=19980,
total-time=671495
{code}

Seems like the throughput is very close to same (671s vs 678s for 20k queries), 
this indicates that overheads of the solution are are negligible.

> Explore collector managers for multi-threaded search
> ----------------------------------------------------
>
>                 Key: SOLR-13350
>                 URL: https://issues.apache.org/jira/browse/SOLR-13350
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Ishan Chattopadhyaya
>            Assignee: Ishan Chattopadhyaya
>            Priority: Major
>         Attachments: SOLR-13350.patch, SOLR-13350.patch, SOLR-13350.patch
>
>          Time Spent: 3h 10m
>  Remaining Estimate: 0h
>
> AFAICT, SolrIndexSearcher can be used only to search all the segments of an 
> index in series. However, using CollectorManagers, segments can be searched 
> concurrently and result in reduced latency. Opening this issue to explore the 
> effectiveness of using CollectorManagers in SolrIndexSearcher from latency 
> and throughput perspective.



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