| From: VBORMC::"[email protected]" "Simon Cole" 12-MAY-1997 14:46:46.26
To: "'[email protected]'" <[email protected]>
CC: "'[email protected]'" <[email protected]>
Subj: FW: Customer Support: System Questions
> Our question is this: "Do these entities have settable limits; and, if
> so, how does one set them?".
>1) Maximum size of a file for writing (frequently called ULIMIT or
> CDLIMIT).
There are 2 numbers associated with files in ULIMIT, on is the block size,
which is fixed at 4096 and the file size, in blocks. This is usually set at
unlimited which will give you a file size of (2^64-1)/4096 blocks. If you
would like to order this number of disks we would gladly take the order but
delivery time may be a bit long.
To look at the values in ulimit type
ulimit -a
to set the value to unlimited type
ulimit -d unlimited
ulimit is documented in the man pages for the shell.
> 2) Maximum size of a Shared-Memory Partition (usually called SHMSIZE or
> SHMMAX).
The maximum value for this is 2 Gb. This is an architectural limit as it is
stored as an unsigned 32 bit integer. We are looking to change this in a
later version of Digital unix.
> 3) Maximum number of Semaphore Undo Structures in the system (usually
> called SEMMNU).
SEMMNU has been renamed to SEMUME. Its default value is 10 and, as it is a
32 bit integer, its maximum value is INT_MAX
>We also need to at least examine the maximum size of a CPU Time Slice
>(sometimes called MAXSLICE); we might in some instances need to change
>it.
Have a look at the Digital unix tuning guide to information on time slice
variables and how they work. This manual should be in the documentation
set.
I hope this helps
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| From: HYDRA::AXPDEVELOPER "[email protected]" 15-MAY-1997 07:56:06.33
To: lords::cole
CC: AXPDEVELOPER
Subj: FWD: Developer Support Questions
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Subj: Developer Support Questions
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From: "Robert C. Burket" <[email protected]>
To: alpha-developer <[email protected]>
Subject: Developer Support Questions
Date: Wed, 14 May 1997 18:02:45 -0400
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From: Bob Burket, Cuadra Associates
PIN: 909960
Custid: 588480
Subject: Names of manuals
I recently received answers to questions I'd asked re kernel tuning
parameters, including nitty-gritty details like maximum size of a CPU
time slice.
I was told that this stuff was covered in Digital unix tuning guide,
which would probably be in our kit.
It's not. In fact, although we got a fat box with our machine, most of
the documents were installation instructions, overviews, and parts
lists.
What I am requesting is information on how to order manuals: whom to
contact, what're the names (and numbers, if appropriate) of manuals re
kernel tuning and reconfiguration. I've located the wonderful Xwindows
tools for setting things but there isn't a clue what any of the
cryptically-named parameters mean (all kernel parameters are cryptically
named; definitely not just DEC's). We are very familiar with these
matters with several other vendors' versions of Unix (including Sun),
but
everybody does things differently in this arena.
Thank you for your attention.
Bob Burket
Cuadra Associates
|
| From: HYDRA::AXPDEVELOPER "[email protected]" 15-MAY-1997 08:01:36.99
To: SMTP%"[email protected]"
CC: AXPDEVELOPER,lords::cole
Subj: RE: Developer Support Questions
Bob,
Did you recieve a set of Operating System CDs? One of them should be entitled
"Digital Unix <version> Online documentation". You should find the tuning guide
on this disk.
Regards,
Simon
|