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

From: Mike Mountjoy <michael_at_london.virgin.net>
Date: Thu, 10 Dec 1998 10:37:43 -0000
Message-ID: <74o88q$6n4$1@nclient3-gui.server.virgin.net>

I'm not sure about linux but solaris requires a set of entries in /etc/system
but the DB will start.

        set shmsys:shminfo_shmmax=20000000
        set shmsys:shminfo_shmmin=1
        set shmsys:shminfo_shmmni=100
        set shmsys:shminfo_shmseg=10
        set semsys:seminfo_semmns=200
        set semsys:seminfo_semmni=70

regrds,
mike

Marcus Ruehmann wrote in message <366EB8BA.FA642929_at_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 Thu Dec 10 1998 - 04:37:43 CST