리눅스 ulimit

1 개요

ulimit

• 쉘과 프로세스의 리소스 사용 제한

2 예시

CentOS6 예시

[root@zetawiki ~]# ulimit
unlimited
[root@zetawiki ~]# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 8256
max locked memory       (kbytes, -l) 32
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) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 8256
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

우분투16 예시

root@zetawiki:~# ulimit 
unlimited
root@zetawiki:~# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 3793
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) 3793
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

3 같이 보기

• ulimit -Hn
• ulimit -Sn
• /etc/security/limits.conf
• /proc/sys/fs/file-max
• 리눅스 prlimit
• bash 빌트인 명령어
• apachectl

4 참고

• http://www.cyberciti.biz/faq/linux-increase-the-maximum-number-of-open-files/
• https://kldp.org/node/1222