Messages in this thread | | | Subject | Re: mmapping large files hits swap in 2.4? | From | Daniel Egger <> | Date | 11 Aug 2002 00:19:59 +0200 |
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Am Sam, 2002-08-10 um 20.49 schrieb Mark Hahn:
> > It is just that it seems the mmaped region is not really bakked by > > the underlying file but by swap space which was exactly what I > > was trying to avoid by using a file.
> why do you think that?
Because the amount of free swap shrinks continously with mmaped memory being touched. If I understood the concept of mmap correctly the system should buffer read/writes to the mapped memory location with real RAM and page out to the file.
My problem actually is that although I have enough memory to buffer the whole area the kernel decides to hit hard on the disc which makes the performance suck.
-- Servus, Daniel
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