Xref: utzoo comp.sys.ibm.pc:30318 comp.unix.xenix:6401
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!vsi1!altos86!pfrennin
From: pfrennin@altos86.Altos.COM (Peter Frenning)
Newsgroups: comp.sys.ibm.pc,comp.unix.xenix
Subject: Re: tunable parameters problem?
Message-ID: <1298@altos86.Altos.COM>
Date: 16 Jun 89 23:49:36 GMT
References: <27@holston.UUCP>
Reply-To: pfrennin@altos86.UUCP (Peter Frenning)
Followup-To: comp.sys.ibm.pc
Organization: Altos Computer Systems, San Jose, CA
Lines: 44

In article <27@holston.UUCP> barton@holston.UUCP (barton) writes:
>Please pardon me if this is an obviosly naive question, but
>I am curious if there is some sort of limit on the number
>of times a single user can open the same file in SCO 2.2.1
>on a 286.
>My problem occurs when the vertical package I developed is
>running with 4+ users doing inquirys in the same masterfile.
>Problem: eventually the system will refuse to open the files
>requested for a particular user, no errors are generated other
>than those in the application.
>The files are RM/Cobol indexed data files. 
>Is there some parameter I can adjust? I am nowhere near the
>limit of 300 open files systemwide.
>Since all the users log in under the same name to start the
>application, I suspect that I am bumping into some limit.
>All suggestions appreciated.
>
>Barton A. Fisk          | UUCP: {texbell,uunet}!warble!holston!barton
>PO Box 1781             | DOMAIN: barton@holston.UUCP
>Lake Charles, La. 70602 | ----------------------------------------
>318-439-5984            | +++++ "Hal, open the pod bay doors" --- Dave

You are probably being hit by two factors simultaneously:
1. Every RM-Cobol indexed file is actually two files; a data file and an index
file.
2. Since all users log in under the same name the per user file limit apply, which is probably very small ==20 or so.

Thinking back I remember a third possibility; NFLOCKS number of file locks, this is probably it, due to Xenix/286's fairly restricted kernel space NFLOCKS is normally kept very small, and RM-Cobol is pretty lax with releasing locks, it even reserves a lock per open file, without even using it, try reconfiguring your system with a lower # of open files, more per user and more locks.

Good luck


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