Sven Köhler wrote:

> Hi,
> 
> Today i had troubles with SAPDB. My DB-instance didn't start anymore.
> 
> I'm exptecting heavy load, so i set the MAXUSERTASKS variable to 512 
> (which is really really high, i know)
> 
> Starting the kernel failed with
> 
> 2003-02-02 19:12:50  9621 ERR 11282 IPC      create_shm: 
> shmget error, 
> Invalid argument
> 2003-02-02 19:12:50     0 ERR 11330 COREHAND ABORTING due to signal 11
> 
> I guess my Linux-Box couldn't provide enough shared memory, 
> but i also 
> found out, that SAPDB has something a "last known good" value, so it 
> could use that as a fall-back.

Indeed, it is not the best idea to increase MAXUSERTASKS to such a value
on a normal PC, because at least 310KB are needed per TASK
and 512 * 310KB + space for data_cache + space ....
may be to much shared memory needed and would result in such an error.

Elke
SAP Labs Berlin 
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