note 114711 added to function.shm-attach

If you get an error like "PHP Warning: shm_attach(): failed for key 0x61040bb5: Cannot allocate memory" then you might need to tweak your shared memory configuration. To see your system values, enter "sysctl kern.sysv." Important values are kern.sysv.shmmax and kern.sysv.shmall: * kern.sysv.shmmax is the max number of bytes one shared memory segment may have * kern.sysv.shmall is the max number of memory pages all shared memory segments together can consume One memory page is 4096 bytes, meaning that if you set kern.sysv.shmmax to 1073741824 (1GB) then kern.sysv.shmall must be at least 262144 to be able to allocate a one GB memory segment (since 262144 * 4096 = 1073741824). tl;dr The default values on some systems are very low and then it is not enough to only increase kern.sysv.shmmax - also kern.sysv.shmall needs to be increased accordingly! ---- Server IP: 72.52.91.14 Probable Submitter: 141.192.169.43 ---- Manual Page -- http://php.net/manual/en/function.shm-attach.php Edit -- https://master.php.net/note/edit/114711 Del: integrated -- https://master.php.net/note/delete/114711/integrated Del: useless -- https://master.php.net/note/delete/114711/useless Del: bad code -- https://master.php.net/note/delete/114711/bad+code Del: spam -- https://master.php.net/note/delete/114711/spam Del: non-english -- https://master.php.net/note/delete/114711/non-english Del: in docs -- https://master.php.net/note/delete/114711/in+docs Del: other reasons-- https://master.php.net/note/delete/114711 Reject -- https://master.php.net/note/reject/114711 Search -- https://master.php.net/manage/user-notes.php