Tuning of the number of open processes for Linux users

Tuning of the number of open processes for Linux users

Reference article:

about the Nproc limitation of Ulimit in RHEL6 (http://www.cnblogs.com/kumulinux/archive/2012/12/16/2820609.html)

!! The content of this article is only tested on RHEL6.4. This article is for all users only

1 View nproc (max user processes) command

[Email protected] ~]# ulimit-u14866

2 modifying Nproc

Temporary modification, re-login or restart after failure:

[Email protected] ~]# ulimit-u 32768
[Email protected] ~]# Ulimit-u
32768

Try adding the following configuration to the /etc/security/limits.conf :

*    Soft    nproc     32768

After exiting the current user, re-login or reboot, the view discovery configuration still fails.

Continue to try adding the configuration in /etc/security/limits.d/90-nproc.conf :

*    Soft    nproc     65536

After exiting the current user, re-login or reboot, the view discovery configuration still fails.

Continue to try adding the configuration in /etc/security/limits.d/90-nproc.conf :

* Soft Nproc 65536* hard Nproc 65536

After you log on or restart, review the discovery configuration to take effect. Hard Nproc can be seen to work.

3 Conclusion

Temporary modification (the shell is unrestricted, XXX can be any number, indicating that this modification is meaningless):

# ulimit-u XXX

Permanent modification, insurance practices are simultaneously modified /etc/security/limits.d/90-nproc.confAnd /etc/security/limits.confAs follows:

limits_conf =/etc/security/limits.conf:

*   Soft   nproc    s1*   hard   nproc    H1

nproc_conf =/etc/security/limits.d/90-nproc.conf:

*   Soft    nproc    s2*   hard    nproc    H2

The S1,H1,S2,H2 must be of a specific meaningful number. At this point ulimit-u displays a value of =min (H1,H2)

Therefore, it is common to set S1=S2=H1=H2, for example in limits_conf and nproc_conf :

*   Soft   nproc   16384*   hard   nproc   16384

Tuning of the number of open processes for Linux users