执行 ulimit -a 命令之后, 得到如下结果:
core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 7782 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 7782 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited
stack size 是对应的内存栈区限制,max memory size这一行是不是就是对应的heap size限制
max memory size
是应用占用内存的最大值(不过在很多系统中是无效的),并不完全是堆大小的限制。