Fixing su: cannot set user id: Resources temporarily unavailable in Linux VPS

Last night when i login into my VPS, i found a weird issue in my VPS.
When i type a su command below it shows :

#su -
su: cannot set user id: Resource temporarily unavailable
#

After searching and googling few minutes, i found a quick resolution to fixing this issue.
This is all about VPS limit.

Edit limit.conf below or change if needed.
#vi /etc/security/limit.conf
#### add/change on these line below:
*    soft    nproc    2047

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