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- From: bobm@hpfcso.FC.HP.COM (Bob Montgomery)
- Date: Thu, 28 Jan 1993 00:47:19 GMT
- Subject: Re: HP 730 data, stack, text process limits(?)
- Message-ID: <7371540@hpfcso.FC.HP.COM>
- Organization: Hewlett-Packard, Fort Collins, CO, USA
- Path: sparky!uunet!charon.amdahl.com!amdahl!rtech!sgiblab!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpfcso!bobm
- Newsgroups: comp.sys.hp
- References: <C1J8qy.IFE@rice.edu>
- Lines: 28
-
- In comp.sys.hp, johnson@horta.rice.edu (Bruce Johnson) writes:
-
- > We have a 730 with 128 MB memory and about 3 times that in swap
- > space. One of the users wants to perform as large a calculation
- > (large arrays) as possible, which will force us to customize the
- > kernel process parameters, or at least some subset of them. It
- > is not clear to me what the subtleties might be in setting maxdsiz,
- > maxssiz, and maxtsiz.
-
- 'maxdsiz' can be easily set up to a little over 600 Mbytes. On 9.0, you
- can have larger sizes, but that exceeds your current swap space anyway.
-
- Stacks can't grow above ~80 Mbytes, so 'maxssiz' should be kept below
- that, and programs that allocate their big arrays on the stack (local
- variables in FORTRAN) will need to have them moved to the data area with
- SAVE, or by putting them in COMMON.
-
- 'maxtsiz' is for the text area, and I doubt if you've written a program
- with more code than the default size.
-
- > Can anybody help on this? What problems
- > will we be likely to run into setting these parameters up to, say,
- > 340 MB, assuming that only the one mammoth job will be running?
-
- Just set maxdsiz to 400 Mbytes in SAM.
-
- Unofficially yours,
- Bob Montgomery, HP
-