Обсуждение: 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!? Professional Web Hosting and site design to include programming Proudly powered by R H Linux 4.2, Apache 1.3.x, PHP 3.x, PostgreSQL 6.x ----------------------------------------------------------------------- Only if you know where you're going can you get there.
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 justGOSUB 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 > -----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. > >
I was trying to 'rename' a column during an inherit. Since I could not find a way to do this, I renamed the column in a view, and then I inherited from the view. Anyway, I think being able to inherit a view is a bug, besides confusing the backend ... *evil grin* Clark