Shared memory in 5.1 with sybase

[Anthony Schneider]

5.1 by default it appears has
	kern.ipc.shmmax: 33554432

you can either increase this sysctl or you can try to decrease the total memory
for sybase.  for ASE 12.5, you can probably just lower "max memory" in your
configuration file.  for 12.0, "total memory" would be the one to lower.  I
am not sure if sybase will let you allocate less shared memory than the default,
though.

i would check the shared memory and semaphore requirements of ASE and try to
modify the equivalent sysctls for your system.  i am not positive, but i think
any changes made to these sysctls will need to be put into /boot/loader.conf
to be read at boot time.

-Anthony.


On Wed, Oct 01, 2003 at 03:41:23PM +0100, Darren Phillips wrote:
> Have installed the freely available sybase 12.5 linux edition on my 5.1 system but get the following error messages on building a db server ...
> 
> kernel  Checked out license ASE_DEV
> kernel  Adaptive Server Enterprise Developer Edition.
> kernel  Using config area from primary master device.
> kernel  Warning: Using default file '/usr/local/sybase12.5/dan.cfg' since a configuration file was not specified. Specify a configuration file name in the RUNSERVER file to avoid this message.
> kernel  os_create_region: can't allocate 37126144 bytes
> kernel  kbcreate: couldn't create kernel region.
> kernel  kistartup: could not create shared memory
> 
> I've trawled the web and seen other posts and suggestions to the effect that shared memory settings can be changed.
> However, not for 5.1
> 
> I don't see any obviously useful options in the GENERIC/NOTES files for kernel recompilation. 
> 
> Any useful information/pointers would be warmly received.
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