Ubuntu 18.04 修改 ulimit

悠悠 2023-02-14 10:09 5阅读 0赞

### Ubuntu 18.04 修改 ulimit ###

*  1，报错\`too many open files\`
 *  2，修改\`open files \`
 *  3，通过设置环境变量修改
 *  4，~~pen files修改为1048576~~
 *  5，永久修改 ulimit

# 1，报错`too many open files` #

*  设置`ulimit`
 *  `open files`默认为`1024`

# 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) 514927
    max locked memory       (kbytes, -l) 16384
    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) 514927
    virtual memory          (kbytes, -v) unlimited
    file locks                      (-x) unlimited

# 2，修改`open files` #

*  `vim /etc/security/limits.conf`添加

* soft     nproc          65535
    * hard     nproc          65535
    * soft     nofile         65535
    * hard     nofile         65535
    
    root soft     nproc          65535
    root hard     nproc          65535
    root soft     nofile         65535
    root hard     nofile         65535
    
    bro soft     nproc          65535
    bro hard     nproc          65535
    bro soft     nofile         65535
    bro hard     nofile         65535

*  `vim /etc/pam.d/common-session`添加

session required pam_limits.so

*  `vim /etc/pam.d/common-session-noninteractive`添加

session required pam_limits.so

*  `vim /etc/systemd/system.conf`修改

DefaultLimitNOFILE=65535

*  重启
 *  修改成功`open files 65535`

# 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) 514927
    max locked memory       (kbytes, -l) 16384
    max memory size         (kbytes, -m) unlimited
    open files                      (-n) 65535
    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) 65535
    virtual memory          (kbytes, -v) unlimited
    file locks                      (-x) unlimited

*  `8565`为进程，查看`Max open files`

# cat /proc/8565/limits
    Limit                     Soft Limit           Hard Limit           Units
    Max cpu time              unlimited            unlimited            seconds
    Max file size             unlimited            unlimited            bytes
    Max data size             unlimited            unlimited            bytes
    Max stack size            8388608              unlimited            bytes
    Max core file size        0                    unlimited            bytes
    Max resident set          unlimited            unlimited            bytes
    Max processes             65535                65535                processes
    Max open files            65535                65535                files
    Max locked memory         16777216             16777216             bytes
    Max address space         unlimited            unlimited            bytes
    Max file locks            unlimited            unlimited            locks
    Max pending signals       514927               514927               signals
    Max msgqueue size         819200               819200               bytes
    Max nice priority         0                    0
    Max realtime priority     0                    0
    Max realtime timeout      unlimited            unlimited            us

# 3，通过设置环境变量修改 #

*  `vim /etc/profile` 增加

ulimit -n 65535

# ulimit -n
    65535

# 4，pen files修改为1048576 #

# cat /proc/sys/fs/file-max
    19768128

# cat /proc/sys/fs/nr_open
    1048576

*  当前值 hard 值

ulimit -a

# ulimit -Sa | grep -ni "open"
    8:open files                      (-n) 1024

# ulimit -Ha | grep -ni "open"
    8:open files                      (-n) 1048576

# 5，永久修改 ulimit #

# ulimit -a | grep -ni "open"
    8:open files                      (-n) 1024
    # ulimit -Sa | grep -ni "open"
    8:open files                      (-n) 1024
    # ulimit -Ha | grep -ni "open"
    8:open files                      (-n) 1048576

*  修改

# vim /etc/systemd/user.conf
    #DefaultLimitNOFILE=
    DefaultLimitNOFILE=1048576
    
    # vim /etc/systemd/system.conf
    #DefaultLimitNOFILE=
    DefaultLimitNOFILE=1048576

vim /etc/security/limits.conf

*  添加

* soft     nproc          1048576
    * hard     nproc          1048576
    * soft     nofile         1048576
    * hard     nofile         1048576
    
    root soft     nproc          1048576
    root hard     nproc          1048576
    root soft     nofile         1048576
    root hard     nofile         1048576
    
    bro soft     nproc          1048576
    bro hard     nproc          1048576
    bro soft     nofile         1048576
    bro hard     nofile         1048576

reboot

# ulimit -a | grep -ni "open"
    8:open files                      (-n) 1048576
    # ulimit -Sa | grep -ni "open"
    8:open files                      (-n) 1048576

--------------------

参考：

1.  [Ubuntu 设置 ulimit][Ubuntu _ ulimit]
2.  [How to increase max open files limit on Ubuntu 18.04?][How to increase max open files limit on Ubuntu 18.04]
3.  [修改linux 最大文件限制数 ulimit][linux _ ulimit]
4.  [linux 系统下open-file文件数限制修改][linux _open-file]
5.  [ulimit 资源限制无效][ulimit]
6.  [linux - Openfire进程未遵循limits.conf中的ulimit nofiles值][linux - Openfire_limits.conf_ulimit nofiles]
7.  [Filecoin 资源分享 Ulimit 问题][Filecoin _ Ulimit]
8.  [修改 ulimit][Filecoin _ Ulimit]

[Ubuntu _ ulimit]: https://www.jianshu.com/p/8cd55a5a51fe
[How to increase max open files limit on Ubuntu 18.04]: https://askubuntu.com/questions/1049058/how-to-increase-max-open-files-limit-on-ubuntu-18-04
[linux _ ulimit]: https://blog.csdn.net/iechenyb/article/details/80707416
[linux _open-file]: https://blog.csdn.net/xiaobai51509660/article/details/86491582
[ulimit]: https://www.dazhuanlan.com/2019/10/02/5d939a4f8f698/
[linux - Openfire_limits.conf_ulimit nofiles]: https://www.coder.work/article/2211366
[Filecoin _ Ulimit]: https://github.com/CoinSummer/filecoin