内核参数调整
ulimit 设置
命令说明
ulimit [-SHacdefilmnpqrstuvx]
参数S:表示软限制,当超过限制值会报警
参数H:表示硬限制,必定不能超过限制值
参数a:将列出所有资源限制
ulimit -a 查看所有可以设置的项目
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 15094
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) 15094
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
临时修改
ulimit -HSn 65536
ulimit -c unlimited
永久修改(limits.conf)
/etc/security/limits.conf
root soft nofile 65535
root hard nofile 65535
* soft nofile 65535
* hard nofile 65535