Re: SHMMAX, etc., for Oracle8 on Linux: Where to change?

From: Marcus Ruehmann <marcus.ruehmann_at_online-club.de>
Date: Wed, 09 Dec 1998 18:51:54 +0100
Message-ID: <366EB8BA.FA642929@online-club.de>

Hi there,

you donīt have to care for those values (at least with the starter database that will be setup).

I certainly did not change anything in my kernel and it works. But check that you have glibc 2.0.6 or higher.

Cheers
Marcus

David GUYON MARTIN wrote:

> On dejanews, searching SHMMAX, I found this:
> (maybe in this group)
> --------------------------------------------------------------------------
> /usr/src/linux should be linked to the kernel source used to configure
> your system.
>
> Mine is symbolically linked as (BTW: I'm using the Redhat 5.1
> distribution, the values shown here are the defaults)
>
> /usr/src/linux -> /usr/src/linux-2.0.34/
>
> /usr/src/linux/include/asm/shmparam.h contains:
>
> #define _SHM_ID_BITS 7
> ...
> #define SHMMAX 0x2000000 /* max shared seg size (bytes) */
> #define SHMMIN 1 /* really PAGE_SIZE */ /* min shared seg size (bytes) */
> #define SHMMNI (1<<_SHM_ID_BITS) /* max num of segs system wide */
> #define SHMSEG SHMMNI /* max shared segs per process */
> ...
> Which translates as:
> SHMMAX = 33554432
> SHMMIN = 1
> SHMMNI = 128
> SHMSEG = 128
>
> /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 */
>
> You can do the math there...
>
> If these parameters aren't correct, you need to set them in the
> above listed include files and rebuild the kernel.
>
> See /usr/include/linux/README for more info..
>
> HTH
>
> --
> Joe Brown - Programmer
> joebrown_at_leading.net - DBA
> joe@.hopi.dtcc.edu - Network Admin
> http://users.leading.net/~joebrown Have a Great day!!!
> ---------------------------------------------------------------------------------------
>
> David Sisk wrote:
>
> > Hi:
> >
> > The installation documentation for Oracle8 on Linux shows to change some
> > shared memory parms, such as SHMMAX, SHMMNI, etc. Where the heck are these,
> > and how do I change them? Could anyone point me in the right direction?
> > Please email?
> >
> > Thanks and regards,
> >
> > --
> > David C. Sisk
> > http://www.ipass.net/~davesisk/ORACLEonNT.htm

--

---

All thoughs in this mail are private and not related to the company Iīm working for

Marcus Ruehmann
Nokia Telecommunications
Software Design Engineer

Email private: marcus.ruehmann_at_online-club.de Email company: marcus.ruhmann_at_ntc.nokia.com

---

Received on Wed Dec 09 1998 - 11:51:54 CST