Thomas Hurst wrote:
* Thomas Hurst ([EMAIL PROTECTED]) wrote:
* Kris Kennaway ([EMAIL PROTECTED]) wrote:
Excellent. I've been seeing this behavior for a long time, mostly on
backup runs (RAID-1 amr SATA -> 1 disk Marvell ata). It's pretty odd
seeing a system with 8G of memory, 60% of which is just cache, swap
out half a dozen things for no apparant reason. And to think, people
on FreeNode ##freebsd just insisted I had a misconfigured system ;)
7 does indeed seem to resolve this. Also, no sign of corruption on my
Marvell 88SX6081, at least during serial read tests. I'll test with
a level 0 dump tonight; my writes go via tee to the filesystem and
sha1(1) so I should pick up any silent corruption.
Doh:
http://voi.aagh.net/voi.nightsdawn.sf-swap-day.png
Making a 100GB dump of /usr, then making a par2 set results in minor
paging activity all through it. Running sha1 over the dump has a
similar effect. It settles around 2.5MB swap now, though; 6 would
quickly settle around 10MB, so it does appear to be improved somewhat;
top isn't showing fetchmail and friends as <swapped> for instance.
This is off a single ata(4) disk, which peaks around 65MB/s.
sha1 file results match that from the dump|tee file|sha1 > file.sha1
at least :)
I don't understand your test procedure, can you elaborate?
Kris
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