On Oct 5, 2009, at 6:05 PM, Dieter wrote:
In message <e316139e-ffcf-432f-8dce-62b120c38...@exscape.org>,
Thomas Backman writes:
I run 8.0-RC1/amd64 with ZFS on an A64 3200+ with 2GB RAM and an old
80GB 7200rpm disk.
My problem is that I get completely unacceptable latency on console
IO
(both via SSH and serial console) when the system is performing disk
IO. The worst case I've noticed yet was when I tried copying a core
dump from a lzjb compressed ZFS file system to a gzip-9 compressed
one, to compare the file size/compression ratio. screen(1) took at
LEAST ten seconds - probably a bit more - I'm not exaggerating here -
to switch to another window, and an "ls" in an empty directory also
about 5-10 seconds.
You might find the "RELENG_7 heavy disk = system crawls" thread
interesting:
} I didn't actually solve it or do anything.
} I just upgraded to RELENG_8.
}
} Now it's behaving more like FreeBSD should.
} I can do sequential reads/writes and still
} use kbd/mouse/X11/buildworld and so on.
Doesn't really help much I'm afraid, since 8.0-RC1 = RELENG_8 = stable/
8. Been running current/stable-8 since May.
Regards,
Thomas
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