Thanks to following for responding so quickly and
with good advice :)
alan_at_nabeth.cxo.dec.com
sheaff_at_eece.maine.edu
aad_at_nwnet.net
VAX::WALPUIN"_at_mulita.coasin.com.uy
rockwell_at_rch.dec.com
jan_at_nzxray.galen.co.nz
Stephane.Branchoux_at_univ-perp.fr
Knut.Hellebo_at_nho.hydro.com
tardell_at_particle.kth.se
merz_at_telematik.informatik.uni-karlsruhe.de
Original Question:
> Managers,
>
> Please excuse me if this a FAQ. One of our
> 3000/600 Alpha's complains about not having
> enough swap space whenever a cpu-intensive
> process is running (even though the processes
> should fit into memory). This machine has
> 160 MB memory and 320 MB swap space. Here's
> the output of "swapon -s":
>
>
> Swap partition /dev/rz3b (default swap):
> Allocated space: 40960 pages (320MB)
> In-use space: 21268 pages ( 51%)
> Free space: 19692 pages ( 48%)
>
>
> Total swap allocation:
> Allocated space: 40960 pages (320MB)
> Reserved space: 36000 pages ( 87%)
> In-use space: 21268 pages ( 51%)
> Available space: 4960 pages ( 12%)
>
> I'm confused about the reserved space. What
> reserves this space, the system or processes?
> Any help would be greatly appreciated. I will
> send a summary.
Answers:
1) Run over-commitment (lazy) mode of swapping by removing
the /sbin/swapdefault file. I actually did this when we
were running OSF v2.x but forgot to delete the link with
subsequent upgrades. Thats egg on my face :(
2) Use at least 3X swap space. A few people suggested this
which suprised me because I've always used the 2X rule.
But will now look at increasing swap space.
3) Check the VSZ "ps output" and see if process is hogging
space.
Thanks agin for all the timely responces,
Steve Mc
mclaughl_at_nssdc.gsfc.nasa.gov
Received on Mon Dec 11 1995 - 20:43:53 NZDT