Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!vms.huji.ac.il!YEHAVI
From: YEHAVI@vms.huji.ac.il
Newsgroups: comp.sys.dec
Subject: Why RISC doesn't support large nuber of users?
Message-ID: <25c936b0141@vms.huji.ac.il>
Date: 2 Feb 90 05:28:48 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: YEHAVI@vms.huji.ac.il
Organization: The Hebrew University, Jerusalem, Israel
Lines: 18


  I have a question which I am very curious to know the answer for:
Take a VAX-6300 which is rated at 4MIPS and a RISC machine which is rated
as over 14 MIPS. THe VAX 6300 can hold over 100 users (few are doing heavy
jobs, most do light jobs) and a few batches. The RISC machine from the other
side is rated by its manufacturer to 35 users... Altough there are a lot
types of RISC machines I hear from most suppliers that RISC machine cannot
hold a large number of users, but very few suppliers claim they can.
  So, what is the problem with the RISC machines? Context switching,
initiating a lot of I/O requests, or what? (I am talking on a mixed academic
environement which includes compilations, statistics packages, databases,
etc., little from everyhting).
                                       Thanks in advance,
                                               __Yehavi:

Yehavi Bourvine
The Hebrew University of Jerusalem
YEHAVI@HUJIVMS