Rainer Hurling wrote:
> Looking into PR kern/104406 it seems, that this describes exactly what I
> am experiencing on three of my systems over the last weeks. They are
> running FreeBSD 8.0-CURRENT (known as 7.0-CURRENT not long ago ;-) ).

Actually it sounds nothing like it at all

> On these machines I often observe hangings, sometimes only a few
> seconds, on other times 20-30 seconds before input/output is back. This
> seems to happen when more extensive disk usage is needed (portupgrade,
> buildworld, browsing complicated websites etc.). During the hang even
> xterm is not responding any more, other (diskless) applications like
> xclock keep to continue. I have no panics, only UFS (and MSDOSFS) are
> mounted, no NTFS. About two months ago none of my systems showed these
> hangings.

Is your system swapping? This is the usual cause of pauses during high
application (actually memory) load.

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