Linux: semaphores: How?
Hi all
I'm now building up a new server, Red Hat 5.2 with updates and the new
2.2.2 kernel.
I may have missed it, but do not recall seeing any thing about semaphores
in the "make menuconfig", is it call some thing else? or is it N/A for
Linux? or did I just not see it?
I would like to build a kernel that can handle the future as I want to go
for a year of uptime (had 6months+ twice now.)
Thanks and have a great day
Terry Mackintosh <terry@terrym.com> http://www.terrym.com
sysadmin/owner I'm excited about life! How about YOU!?
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Hi!
On Thu, 25 Feb 1999, Terry Mackintosh wrote:
I'm now building up a new server, Red Hat 5.2 with updates and the new
2.2.2 kernel.I may have missed it, but do not recall seeing any thing about semaphores
in the "make menuconfig", is it call some thing else? or is it N/A for
Linux? or did I just not see it?
It is "System V IPC".
Oleg.
----
Oleg Broytmann National Research Surgery Centre http://sun.med.ru/~phd/
Programmers don't die, they just GOSUB without RETURN.
The defaults for RH5.2 (from /usr/src/linux/include/linux/sem.h:
#define SEMMNI 128 /* ? max # of semaphore identifiers
*/
#define SEMMSL 32 /* <= 512 max num of semaphores per
id */
#define SEMMNS (SEMMNI*SEMMSL) /* ? max # of semaphores in system
*/
#define SEMOPM 32 /* ~ 100 max num of ops per semop
call */
#define SEMVMX 32767 /* semaphore maximum value */
Which means the default max semaphores is 128*32 = 4096, I don't
think you'll have a problem. :)
DwD
Show quoted text
-----Original Message-----
From: owner-pgsql-hackers@postgreSQL.org
[mailto:owner-pgsql-hackers@postgreSQL.org]On Behalf Of
Oleg Broytmann
Sent: Thursday, February 25, 1999 12:42 PM
To: Terry Mackintosh
Cc: PostgreSQL-development
Subject: Re: [HACKERS] Linux: semaphores: How?Hi!
On Thu, 25 Feb 1999, Terry Mackintosh wrote:
I'm now building up a new server, Red Hat 5.2 with
updates and the new
2.2.2 kernel.
I may have missed it, but do not recall seeing any
thing about semaphores
in the "make menuconfig", is it call some thing else?
or is it N/A for
Linux? or did I just not see it?
It is "System V IPC".
Oleg.
----
Oleg Broytmann National Research Surgery Centre
http://sun.med.ru/~phd/
Programmers don't die,
they just GOSUB without RETURN.
