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From "Mikhail Khludnev (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3585) processing updates in multiple threads
Date Thu, 30 Aug 2012 22:36:08 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13445363#comment-13445363
] 

Mikhail Khludnev commented on SOLR-3585:
----------------------------------------

Dmitry,

two threads speedup limit is reasonable to me - you have two ways chip ark.intel.com/products/37255/Intel-Core2-Duo-Processor-T6600-(2M-Cache-2_20-GHz-800-MHz-FSB)
.
Key factor for enabling threads is cpu-idle time i.e. no gain is expected after 100% cpu usage.

Also, local streaming is a rare usage, I believe. Most time it's kind of remote producer-consumer
eg solrj,  where proper level of utilization is challenging. 
                
> processing updates in multiple threads
> --------------------------------------
>
>                 Key: SOLR-3585
>                 URL: https://issues.apache.org/jira/browse/SOLR-3585
>             Project: Solr
>          Issue Type: Improvement
>          Components: update
>    Affects Versions: 4.0-ALPHA
>            Reporter: Mikhail Khludnev
>            Priority: Minor
>         Attachments: multithreadupd.patch, report.tar.gz, SOLR-3585.patch, SOLR-3585.patch
>
>
> Hello,
> I'd like to contribute update processor which forks many threads which concurrently process
the stream of commands. It may be beneficial for users who streams many docs through single
request. 

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