[root@localhost PosixMsg]# sysctl -A | grep fs.mqueue
fs.mqueue.queues_max = 256
fs.mqueue.msg_max = 10
fs.mqueue.msgsize_max = 8192
fs.mqueue.msg_default = 10
fs.mqueue.msgsize_default = 8192
$ cat /proc/sys/kernel/shmmax 
/dev/shm