"Concurrent connection limit"?


#1

I am trying to load-test my WP blog (just to see…), using loadimpact.com .
But the error log fills up with errors like this:

Can I change this limit of 30 ?


#2

Not without very good reason. That limit is pretty much impossible to hit in ordinary use.


#3

If my understanding is correct: this limit is applied to each IP? So if 100 different users came from 100 different IPs (using default concurrency settings on their browsers), this limit would not be hit?


#4

Correct. This limit is on the number of connections which a single IP can make.


#5

If you are on a Shared Hosting platform, you will find 4 variables in the following file that begin with ‘Max’, and which control the limits of ssh/ftp/sftp connections:

/etc/proftpd/proftpd.conf


#6

That file only has to do with FTP connections. (Hence the “ftp” in “proftpd”.) It has no effect on ssh, nor on the web server.


#7

ok… my bad… curious, searching /etc/ssh/sshd_config on shared and ps, but don’t see explicit vars set there for connection limits. Is it a secret where it is set, and are there other limiting ssh vars that are similar to the ftp ones, that would be good to know about?


#8

There are some limits on the number of processes one user can have running at a time, which will end up limiting the number of SSH connections you can have active. Like all the other limits being discussed here, though, it is not a limit you will ever run into in ordinary usage (it’s somewhere around 10 or 20, I think).