Thread

1. Linux: semaphores: How?

   Terry Mackintosh <terry@terrym.com> — 1999-02-25T17:39:10Z

   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.
   
   
   

2. Re: [HACKERS] Linux: semaphores: How?

   Oleg Broytmann <phd@sun.med.ru> — 1999-02-25T17:42:28Z

   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.
   
   
   

3. RE: [HACKERS] Linux: semaphores: How?

   Daryl W. Dunbar <daryl@www.com> — 1999-02-25T23:16:45Z

   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.
   >
   >
   
   
   

4. Inherit View

   Clark C. Evans <clark.evans@manhattanproject.com> — 1999-02-27T00:08:06Z

   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