When I wrote this article, I was really fed up with the VScode remote plug-in. The reason why my server crashed several times was that it took up too much hard disk reading and writing. Every time I had to hard restart the VPS in the background of the VPS service provider. Restore service.

# cause

This site is developed using Python + Flask, so I use the hot development mode, that is, I modify and update the py file in the background at any time, and then restart Flask to launch new functions.

I use the VScode remote plug-in to remotely access my VPS to edit and modify files, but when I press Ctrl+S, when I go to the browser to check the modified code effect, I find that it has not been saved. ?

Going back to VScode, it shows that it is saving, check that SSH has been disconnected, and you can’t connect directly after refreshing the web page. Go to the background of the VPS service provider to see that the hard disk is directly reading and writing at 1G per second, which has lasted for several minutes, and directly eats up the CPU. Yes, of course it just hung up.

# Find the problem

At first, I didn’t consider the VScode remote plug-in problem. I thought it was docker out of memory, or the request volume was too large and nginx couldn’t support it. Because I couldn’t remotely access the server when I got stuck, so I couldn’t view it. What the hell is causing this.

But one time when the same failure happened, I happened to use SSH to connect to the server, and when I opened htop to check how much memory the code I just modified could optimize the memory usage, it got stuck again. In the interface, the last 100% CPU usage is vscode-server:

# Solve the problem

Although I don't know if there is any hard connection to this, it hasn't happened since I switched to WinSCP. Then I also searched for posts with similar experiences in the search engine. They have different solutions to this problem, but one thing worth noting is that this problem will not be reproduced on a server with better configuration. This is only the case on lower end VPSs.