Websocktets gets ignored after 3k concurrent requests though the system usage is less than 35%. Any idea on why this happens

Parse Server 📡
#1

Please suggest overcoming this

#2

How many parse server running on the server? Maybe you should double the running instances. Or maybe you hit the open file limit? Every connection opens a file( I don’t know if this is the correct word) .

I would try doubling parse server first. For example if you run 1 parse server in the server run 2 parse server.

#3

Try this:

Edit the file on your Linux system /etc/security/limits.conf, add:

* soft nofile unlimited
* hard nofile unlimited

* soft noproc unlimited
* hard noproc unlimited

* soft stack unlimited
* hard stack unlimited

save and reboot, then see if fixed your issue.
If not, try @uzaysan tip.