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List:       kde-devel
Subject:    Re: CPU load control
From:       Jakub Stachowski <stachowski () hypair ! net>
Date:       2005-08-20 15:06:44
Message-ID: 200508201706.44696.stachowski () hypair ! net
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Dnia sobota, 20 sierpnia 2005 13:39, Manuel Amador napisał:
[ ... ]
> You start a background task which starts to read directories and files> (the \
> regular activity of an indexer), even with a nice 20 level, and> pretty soon apps \
> you wanna work with need to page their data from the> hard disk.  This is caused by \
> two phenomenons: disk cache eviction (the> OS evicts useful files from the cache \
> because the indexer starts to read> files, and the OS services those requests, \
> caching stuff for the> indexer) and memory pressure (which happens because while \
> the indexer> runs, stuff will get paged in to disk to service the memory requests> \
> from the indexer).
You can prevent this by using fadvise() and/or madvise() to hint kernel that indexed \
files should not be loaded into disk and page cache.
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