[jira] [Closed] (NUTCH-180) Performance problem with widely used keywords

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

     [ https://issues.apache.org/jira/browse/NUTCH-180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Markus Jelsma closed NUTCH-180.
-------------------------------

    Resolution: Won't Fix

Bulk close of legacy issues:
http://www.lucidimagination.com/search/document/2738eeb014805854/clean_up_open_legacy_issues_in_jira

> Performance problem with widely used keywords
> ---------------------------------------------
>
>                 Key: NUTCH-180
>                 URL: https://issues.apache.org/jira/browse/NUTCH-180
>             Project: Nutch
>          Issue Type: Wish
>          Components: searcher
>            Reporter: Mike Alulin
>
> It looks like Nutch is very slow when the search phrase includes a few widely used keywords. For example "I 1 2 3 4 5 6 7 8 9 0" typed without the quotes to Yahoo, Google, or MSN is processed in less than a second. Nutch on the other hand requires much more time for this even on smaller databases. For example this phrase made objectssearch.com think more than 1 minute although their DB is much smaller than DBs of the big 3 guys. On my test Nutch DB with only 3M pages this phrase took a few seconds to process.
> Unfortunately I do not know much about search algorithms, but it looks like Nutch do have some space to improve the search performance. The current implementation can be easily "killed" by a few search requests like this. Just a couple of dozen of such requests makes my server with 2 Opterons think for a minute or two with 100% CPU utilization.

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