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- Xref: sparky comp.unix.sysv386:16563 comp.unix.questions:13531
- Path: sparky!uunet!shady!kevin
- From: kevin@shady.UUCP (Kevin Smith)
- Newsgroups: comp.unix.sysv386,comp.unix.questions
- Subject: Re: Overflow warnings (SCO SV3.2)
- Message-ID: <48@shady.UUCP>
- Date: 17 Nov 92 15:49:54 GMT
- References: <1992Nov12.175016.7295@openage.openage.com> <BxnKJu.9DF@world.std.com>
- Reply-To: kevin@shady.UUCP (Kevin Smith)
- Followup-To: comp.unix.sysv386
- Organization: ShadeTree Software, Inc.
- Lines: 38
-
- In article <BxnKJu.9DF@world.std.com> apl@world.std.com (Anthony P Lawrence) writes:
- :>gryphon@openage.openage.com (The Golden Gryphon) writes:
- :>:
- :>:cd /etc/conf/cf.d
- :>:./configure
- :>:
- :>:find NREGION and NFILE, and increase their size quite a bit. I would recommend
- :>:doubling them. Then relink the kernel. DO THIS IN SINGLE USER MODE! Back the
- :>:system up first.
- :>
- :>While this is certainly not bad advice, isn't backing up the system somewhat
- :>like cautioning the use of seatbelts while vacuuming the car? All that's
- :>really going to be affected is /unix. I could see making a /unix.good, and
- :>he certainly should have backups anyway, but this makes it all sound very
- :>scary and system-threatening!
- :>
- :>What is the point of single user mode? Increasing these parameters doesn't
- :>affect anything but the space in the new kernel, so how is it going to
- :>cause any problems for the running system?
- :>
- :>Just wondering why we're being so cautious here.
- :>
-
- Relinking the kernal and installing the new unix automatically creates
- /unix.old. This is fine unless you screw up the kernel twice in a row
- and have nothing to boot. This is where the /unix.good can save the day.
- I always create a /unix.good from a known, working, kernel. It, however,
- does not have to always be the latest one, just one that will boot.
-
- Single user mode is important because 'ps' may not run with the new
- kernel (without '-n /unix.old'), which may, in turn, cause shutdown to
- hang or not shut everything down. Many applications (ingres...) use
- ps to find their daemons and servers and so may not terminate properly.
- --
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