On Thu, 2009-07-23 at 21:08 +0800, mcclnx mcc wrote: > we have following setup on sysctl.conf: > kernel.sem = 256 32000 128 142 > > I tried to startup database and have error happen. I knew problem come from SEMMNS (32000) is not enough. Does anyone know how to calculate how many semaphores already use on system? > --- I bet if you take a look at Oracles Unbreakable you will get a hint. /etc/sysctl.conf and the kernel-doc sysctl docs will tell you. John