Missing include path caused cpptools-srv to grow to 5.5G. Only 400MB needed after missing path was added.

Type: LanguageService

Intellisense is not working in a certain file. I don't know the cause yet so I am not able to make a simple repro.

I see in the logging

Failed to read response from server: 20
Resetting IntelliSense server: C:\SOMEFILE.CPP

In the extension host logging, I see

[2020-11-02 15:37:49.425] [exthost] [error] onWillSaveTextDocument-listener from extension 'ms-vscode.cpptools' threw ERROR
[2020-11-02 15:37:49.425] [exthost] [error] Error: timeout
	at Timeout._onTimeout (c:\Program Files\Microsoft VS Code\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:638:581)
	at listOnTimeout (internal/timers.js:531:17)
	at processTimers (internal/timers.js:475:7)

But I get this message when opening most files so I dont think this is the cause.

Is there a way that I can get more info/logging on what is causing it to fail?

Extension Version 1.1.0-insiders3: October 22, 2020

Version: 1.50.1 (system setup)
Commit: d2e414d9e4239a252d1ab117bd7067f125afd80a
Date: 2020-10-13T15:06:15.712Z
Electron: 9.2.1
Chrome: 83.0.4103.122
Node.js: 12.14.1
V8: 8.3.110.13-electron.0
OS: Windows_NT x64 10.0.17763

Start with the reported IntelliSense failure in SOMEFILE.CPP and the cpptools extension-host logs, including the failed response and timeout messages. Reproduce the server reset or memory growth if possible, then use additional logging to identify the missing include path or failing language-service operation. Done means the cause is isolated and a focused fix or diagnostic path is identified.