UnderFenex
Phoenix Channel Limit
Hi, I have a setup of websockets using Phoenix Channels. I setup this configuration in Ubuntu:
sysctl -w fs.file-max=12000500
sysctl -w fs.nr_open=20000500
ulimit -n 20000000
sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'
sysctl -w net.ipv4.tcp_rmem='1024 4096 16384'
sysctl -w net.ipv4.tcp_wmem='1024 4096 16384'
sysctl -w net.core.rmem_max=16384
sysctl -w net.core.wmem_max=16384
When I check the ulimit -n, I get 65535
But When I’m load testing the websockets app with Tsung it always gets stuck at 993 socket connections. I’m thinking that the issue can be a limit in the OS?
Marked As Solved
axelson
Have you also checked the machine that is running Tsung? Perhaps the issue could be on that side.
Also Liked
UnderFenex
Thanx @axelson and @jakemorrison. The issue was that the parameters where to be set also in the Tsung server. I got confused because in my local setup Tsung didn’t have any problems.
UnderFenex
UnderFenex
I am running Tsung from my local machine, I have tested 5k concurrent users agains a vagrant machine, without issues, but when I test again a Cloud VM, it always get stuck a lower than 1k users.
I am targeting the direct IP of the cloud VM. I have used lightsail and azure, and the issue persists, seems like its a configuration on the cloud VM, but I have no way to debug what could it be.
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