Unix on the Vax 8600
Ozan Yigit
oz at yetti.UUCP
Fri Jul 5 04:54:19 AEST 1985
In article <7500004 at pbear.UUCP> peterb at pbear.UUCP writes:
>
>
> Since the 8600 still uses the same I/O structure as the 780's, heavy
>swap will slow a 8600 down.
>
The only reason that an 8600 will slow down is because
the 8600 is the only VAX that can push say an RA81 to its
performance limit.
> Piling on more users to an 8600 will slow I/O somewhat since the
>unibus is still there, but cpu intensive processes will excell on the 8600.
>
Even an 8600 does not use up the entire unibus bandwidth. We found
that our 8600 was on its knees (running VMS) because of a job with
extremely high paging rate. It actually was due to an RA81
(there was only one disk at that time) becoming a bottleneck,
NOT the unibus.
Oz
--
Oz [all wizardesque side effects are totaly unintentional,
unless stated otherwise..]
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