shmall, shmmax, shmmni & swap

Hello all, I need help in configuring shared memory on Linux 6.3 and LInux 7.2. What is shmall ? This kernelparameter does not exist on Solaris nor HP. Why is shmmni not existing ? I was able to increase shmmax (echo 134217728 > /proc/sys/kernel/shmmax) and new value was visible; however, my Versant database server could not allocate more shared memory. I also tried to increase shmall as root, but value was not saved in /proc/sys/kernel/shmall. Any advise on how to increase shared memory is more then welcome. Thanks Katharina