Robert Hancock wrote:
Daniel Drake wrote:
On Wed, 2007-08-29 at 07:30 -0700, Arjan van de Ven wrote:
My experiments show that when there is not much free physical memory,
swapoff moves pages out of swap at a rate of approximately 5mb/sec.
sounds like about disk speed (at random-seek IO pattern)
We are only using 'standard' seagate SATA disks, but I would have
thought much more performance (40+ mb/sec) would be reachable.
Not if it is doing random seeks..
If the swap device is full, then there is no need for random
seeks as the swap pages can be read in disk order. A not
so full swap will skip over the unused areas, the time
needed should still be limited to the time needed for reading the
whole swap device.
If this optimization is worth it is another problem though.
Helge Hafting
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
