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