My quantum mechanical computational software (running on amd64 etch with 3700mb per node, total ram 16GB) is implicitly using shared memory segments to speed up transfer outside the kernel. It is unable to allocate a 38731776bytes segment, and the computation dies.
In fact, command "ipcsl -l" returns" ------ Shared Memory Limits -------- max number of segments = 4096 max seg size (kbytes) = 32768 max total shared memory (pages) = 2097152 min seg size (bytes) = 1 ------ Semaphore Limits -------- max number of arrays = 128 max semaphores per array = 250 max semaphores system wide = 32000 max ops per semop call = 32 semaphore max value = 32767 ------ Messages: Limits -------- max queues system wide = 16 max size of message (bytes) = 8192 default max size of queue (bytes) = 16384 QUESTIONS: 1) How to set shmmax in debian? 2) Which is the upper limit for the hardware indicated abobe, should a relationship to the hardware be? (in fact, I can't predict the size of segments that will be tried to be allocated in the future i the MD simulations I am carrying out). 3)What else - if anything - should be set besides shmmax. Thanks for help. I could not get help from the software people. Probably because they are used at big business (supercomputer centers) being unfamiliar with the small business I am presenting here. Cheers francesco Pietra ____________________________________________________________________________________ Don't get soaked. Take a quick peek at the forecast with the Yahoo! Search weather shortcut. http://tools.search.yahoo.com/shortcuts/#loc_weather -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
