Re: Kernel parameters with Online 7.2 & unixware2.1.2

Jim, Increasing the number of semaphore identifiers in the kernal should have no visible effect to Online. But, when increasing this parameter also increase the "Max number of Semaphores" semmns, "Number of Semaphore Undo Structures" semmnu, and "Semaphore Undo Entries per Process" semmnu. Take a look at the man page on semaphore usage to get a feel for how these kernal limits are used. Online uses semahores as needed in its locking logic. When informix can no longer grab semaphores or shared memory it will CRASH! I've had it happen a couple of times till I found a value that worked with my large Informix database. Bill wtpeck@geocities.com James McCallum wrote: > Anyone, > > The Informix -Online 7.2 recommends some kernel parameters in its > machine specific release notes. I would like to increase SEMMNI from > the recommended 50 to 1000 to over come a semeaphore structure > shortage caused by the high number of tcp connections. But I'm > looking for some advise on the impact to Online if this is increased. > > Many thanks Jim