Many connections get SYN_RECV status

  • Posted April 29, 2014

I have small app, client connects to socket (socket listened by twisted based socket server), send/receive some data, disconnects and reconnects in 2 second. While I was on another VPS, it was ok, but now connections too often get SYN_RECV status.

I’m not system administrator, so used default Ubuntu image.

I have tried config sysctl, use many solutions from internet but cannot get positive result.


Submit an answer
You can type!ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Thenks, I will read this article, but it’s about 10 open connections at the same time, i think ~1000 open close operation/min. <br>I have googled for a week before ask the question.

Looks like your droplet is receiving too many connections, check out <a href=“”></a>. You can read more on that by googling “Linux TCP/IP optimization.”