Re: [HACKERS] mmap vs read/write

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От
Bruce Momjian
Тема
Re: [HACKERS] mmap vs read/write
Дата
в 18:30:53
Msg-id
199805152216.SAA21606@candle.pha.pa.us
Ответ на
mmap vs read/write (Huw Rogers)
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Дерево обсуждения
mmap vs read/write Huw Rogers <count0@fsj.co.jp>
Re: [HACKERS] mmap vs read/write Bruce Momjian <maillist@candle.pha.pa.us>
Re: [HACKERS] mmap vs read/write ocie@paracel.com
> This is unfair to mmap since mmap is called once
> per page. Better to mmap large regions (many
> pages at once), then use msync() to force 
> write any modified pages. Access purely in
> memory mmap'd I/O is _many_ times faster than
> read/write under Solaris or Linux later
> than 2.1.99 (prior to 2.1.99, Linux had
> slow mmap performance).

This makes me feel better.  Linux is killing BSD/OS in mapping tests.

See my other posting.


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