Messages in this thread |  | | Date | Tue, 30 Apr 1996 18:16:02 +0100 (BST) | From | Steve Payne <> | Subject | Re: striped swapping? |
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> > > If I have two swap partitions on two separate hard drives (on separate > > > busses) under linux is the swapper clever enough to strip (even corsely > > > (sp?)) bewteen them? (I'm guessing you _can_ have more than one swap > > > partition active at once). > > > > Yes, IF you are using the new swapon from util-linux-2.5 or later, AND > > you use the new priority flags to give both your swap partitions the > > same priority. If you don't do this, then the earlier installed > > partitions will be swapped to in preference to the later ones. > > > Well, I now have two swap partitions running together at the same priority. Here are the results of two simultanious Modula 3 compiles (with the striping and without):
Before:
10.86user 0.85system 2:27.52elapsed 7%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (5758major+3193minor)pagefaults 1776swaps
10.40user 0.89system 2:26.71elapsed 7%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (5990major+3184minor)pagefaults 1727swaps
( 147.52/1776 = 0.0830 )
After:
7.49user 0.80system 1:48.13elapsed 7%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (4523major+2031minor)pagefaults 1507swaps
7.51user 0.77system 1:47.86elapsed 7%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (4415major+2035minor)pagefaults 1519swaps
( 108.13/1519 = 0.0711 )
and...for those interested
total used free shared buffers cached Mem: 14960 10632 4328 5216 404 4880 -/+ buffers: 10228 4732 Swap: 95720 8348 87372
Linux igor 1.3.93 #1 Tue Apr 30 16:13:05 BST 1996 i586 (100Mhz)
Looks like it made a difference :)
srp
-- Stephen Payne - "Hey, I've just invented a great new sound..." srp20@cam.ac.uk - "Untie Neil's legs Vyvyan"
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