On Oct 5, 2009, at 6:05 PM, Dieter wrote:
> In message ,

quoted text
> 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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