Centos7修改默认最大文件打开数ulimit值修改

[root@bogon ~]# vi /etc/systemd/system.conf
[root@bogon ~]# cat /etc/systemd/system.conf

This file is part of systemd.

systemd is free software; you can redistribute it and/or modify it

under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation; either version 2.1 of the License, or

(at your option) any later version.

Entries in this file show the compile time defaults.

You can change settings by editing this file.

Defaults can be restored by simply deleting this file.

See systemd-system.conf(5) for details.

[Manager]
#LogLevel=info
#LogTarget=journal-or-kmsg
#LogColor=yes
#LogLocation=no
#DumpCore=yes
#CrashShell=no
#ShowStatus=yes
#CrashChVT=1
#CPUAffinity=1 2
#JoinControllers=cpu,cpuacct net_cls,net_prio
#RuntimeWatchdogSec=0
#ShutdownWatchdogSec=10min
#CapabilityBoundingSet=
#SystemCallArchitectures=
#TimerSlackNSec=
#DefaultTimerAccuracySec=1min
#DefaultStandardOutput=journal
#DefaultStandardError=inherit
#DefaultTimeoutStartSec=90s
#DefaultTimeoutStopSec=90s
#DefaultRestartSec=100ms
#DefaultStartLimitInterval=10s
#DefaultStartLimitBurst=5
#DefaultEnvironment=
#DefaultCPUAccounting=no
#DefaultBlockIOAccounting=no
#DefaultMemoryAccounting=no
#DefaultLimitCPU=
#DefaultLimitFSIZE=
#DefaultLimitDATA=
#DefaultLimitSTACK=
#DefaultLimitCORE=
#DefaultLimitRSS=
#DefaultLimitNOFILE=
DefaultLimitNOFILE=1024000 #这里需要修改
#DefaultLimitAS=
#DefaultLimitNPROC=
DefaultLimitNPROC=1024000 #这里也需要修改
#DefaultLimitMEMLOCK=
#DefaultLimitLOCKS=
#DefaultLimitSIGPENDING=
#DefaultLimitMSGQUEUE=
#DefaultLimitNICE=
#DefaultLimitRTPRIO=
#DefaultLimitRTTIME=
[root@bogon ~]# ulimit -a #修改之后没有重启
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 3791
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024 #还是默认值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) 3791
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
[root@bogon ~]# reboot
Connection to 192.168.1.107 closed by remote host.
Connection to 192.168.1.107 closed.
root@BP:~# ssh 192.168.1.107 #我使用的是密钥登录，所以不用再输入密码
Last login: Mon Jun 26 15:38:21 2017 from 192.168.1.100
u[root@bogon ~]# 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) 3791
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024000 #重启后生效了
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) 1024000
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
[root@bogon ~]#

Centos7修改默认最大文件打开数