性能压测前linux操作系统的检查

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If you run an agent in Linux, you may need to configure ulimit to run many threads. please check followings.

>  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) 30676
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 16000
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) 32768
virtual memory          (kbytes, - v ) unlimited
file locks                      (-x) unlimited

If your machine has small "max user processes" and "open files" entry when you run "ulimit -a", please make it at least over 10000. Open /etc/security/limits.conf file in the root account and add followings.

root         soft    nproc           32768
root         hard    nproc           32768
root         soft    nofile          16000
root         hard    nofile          16000