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From "Sebastian Nagel (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-2582) Set pool size of XML SAX parsers used for MIME detection in Tika 1.19
Date Tue, 22 May 2018 15:58:00 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-2582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16484182#comment-16484182
] 

Sebastian Nagel commented on NUTCH-2582:
----------------------------------------

The default pool size is 10 - this should already show a significant improvement in Fetcher
throughput.

> Set pool size of XML SAX parsers used for MIME detection in Tika 1.19
> ---------------------------------------------------------------------
>
>                 Key: NUTCH-2582
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2582
>             Project: Nutch
>          Issue Type: Improvement
>          Components: protocol
>    Affects Versions: 1.15
>            Reporter: Sebastian Nagel
>            Priority: Major
>
> See [NUTCH-2578|https://issues.apache.org/jira/browse/NUTCH-2578?focusedCommentId=16482879&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16482879].
Tika 1.19 will use a pool of SAX parser to avoid the bottleneck while creating a new one (see
NUTCH-2578/TIKA-2645). Fetcher should adjust the size of the pool to the number of Fetcher
threads (or a fraction of it because most threads are likely to be busy fetching content).



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