性能压测前linux操作系统的检查

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

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> 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.

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root         soft    nproc           32768

root         hard    nproc           32768

root         soft    nofile          16000

root         hard    nofile          16000