> my ultra10/440 experienced the sleep forever bug twice a couple of
> weeks ago.  it happens on any sparc64 box.  it seems to be more
> likely to occur if the disk and network are busy (eg, both the
> above happened when i started writing and read heavily over NFS
> at the same time.)
>
>
> .mrg.

appears to me that there might be a connection between *really* heavy 
disk and/or network I/O (as your NFS example stated) and sleep forever; 
as i wrote yesterday, i have an U2E running for months now, the most 
important service is IMAP. i.e., there are chunks of data read/written 
from and to disk and network I/O for a *short time*, then silence.

the U2E is connected to a managed L3 switch so that i have a great 
overview over it's stats (unfortunately, i'm not running sth. like mrtg 
yet).

however, seems to me that there's a dependence between sleep forever 
and the apps run on the machine and their related I/O 'profile'...

-- 
mit vorzueglichster Hochachtung/best regards,

Timo Schoeler
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