Messages in this thread | | | Date | Wed, 8 Dec 2004 11:35:24 -0800 | From | William Lee Irwin III <> | Subject | Re: Limiting program swap |
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On Wed, Dec 08, 2004 at 02:07:36PM -0500, Bill Davidsen wrote: > I have several machine of various memory sizes which suffer from really > poor performance when doing backups. This appears to be because all the > programs other than the backup quickly get swapped to make room for i/o > buffers. > Is there some standard portable way to prevent this, either by reserving > some memory for programs which will not get swapped regardless of i/o > pressure, or alternatively limiting the total memory used for i/o > buffers, dcache, and similar things? > I did a crude hack for 2.4.17, but if I'm missing some obvious trick I'd > rather not do something which can't go in the mainline kernel. Anyone > care to show me what I missed, or is this just a characteristic of Linux?
This appears at least superficially related to /proc/sys/vm/vfs_cache_pressure in 2.6.x-mm (possibly also mainline)
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