Informix

That doesn't seem too crazy, and the memory footprint is still quite small, but it may still be more than normal so may be hitting OS limits...especially if you have multiple instances on the server. I still think that's the likely problem that you are ...

run the command $ sudo sysctl -a | grep shm kernel.shmmax = 68719476736 kernel.shmall = 4294967296 kernel.shmmni = 4096 vm.hugetlb_shm_group = 0 Where SHMMNI ??? This parameter sets the system wide maximum number of shared memory segments. SHMALL ...

Kate: The release note settings for kernel parameters are minimums and are simply values that allowed the Informix techs to start and test the engine. You may certainly need higher settings for some. When you have many instances on a host, shmmninis ...