[jira] [Commented] (SOLR-2356) indexing using DataImportHandler does not use entire CPU capacities

["Roman (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-2356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13641692#comment-13641692 ] 

Roman commented on SOLR-2356:
-----------------------------

Why this issue is marked as minor? Data import can bee speeded up to 5-10 times on most machines. It seems pretty important.
                
> indexing using DataImportHandler does not use entire CPU capacities
> -------------------------------------------------------------------
>
>                 Key: SOLR-2356
>                 URL: https://issues.apache.org/jira/browse/SOLR-2356
>             Project: Solr
>          Issue Type: Improvement
>          Components: update
>    Affects Versions: 4.0-ALPHA
>         Environment: intel xeon processor (4 cores), Debian Linux Lenny, OpenJDK 64bits server v1.6.0
>            Reporter: colby
>            Priority: Minor
>              Labels: test
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> When I use a DataImportHandler to index a large number of documents (~35M), cpu usage doesn't go over than 100% cpu (i.e. just one core).
> When I configure 4 threads for the <entity> tag, the cpu usage is splitted to 25% per core but never use 400% of cpu (i.e 100% of the 4 cores)
> I use solr embedded with jetty server.
> Is there a way to tune this feature in order to use all cores and improve indexing performances ?
> Because for the moment, an extra script (PHP) gives better indexing performances than DIH.
> thanks

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