When I said stop, I meant they stop running before finishing. If increasing the swap space makes them vrey slow this will not help me. The reason I run 6 programms simultaneously is to save time. Can you explain 'hit either the system over commit limit or actual exhaustion of memory'? I will ask about this problem at the linux forum also. Thanks, Anna ----- Original Message ----- From: "John S. Fine" <johnsfine@xxxxxxxxxxx> Date: Wednesday, March 3, 2010 7:35 pm Subject: Re: cannot run many programs simultaneously > As Ian already explained, you're asking in the wrong place, > because > there is no reason to believe this is a GCC issue. > > The programming or linux-general forums at LQ would be a better > place if > this discussion needs a lot of follow up. > http://www.linuxquestions.org/questions/ > > But for now, I'll give the basic answer: > > Anna Sidera wrote: > > They run for some time and then they stop. However when I run > only 3 of them simultaneously, and then run the other 3, they all > finish successfully. > > > The obvious explanation for that behavior would be you hit either > the > system over commit limit or actual exhaustion of memory. Until > you rule > that out, you shouldn't look for any more obscure theory. > > Either one of those (over commit limit or exhaustion of memory) > could be > dealt with by increasing the amount of swap space in the system. > If you > lack enough physical memory to run 6 of those processes at once, > increasing swap space would stop that from crashing, but might > just make > them crawl instead of crash. (Depending on what you mean by > "stop", > that might already be what you are experiencing. You may need to > explain "stop" better in order to get a better answer). > > I do not know if it is a bug or a problem with the memory the > system allows me to use. The output of the ulimit -a command is > the following: > > That isn't relevant. No matter what ulimit allows each process to > use, > it can't allow the total of all six processes to use more than is > available for the whole system. > >
