Enormous memory usage

[chrisbrahms]

Since upgrading to 0.16.11 (from 0.16.9), the Julia instance attached to VS Code has crashed my PC several times by apparently grabbing all available memory. The Julia instance using gigabytes of memory in the photo (screengrabs no longer work at this stage) is started as soon as I open a .jl file and before I open a Julia REPL. (I checked--killing the active REPL does not remove this process and killing the process does not close the REPL). Before restarting the machine (and hence VS Code) for the first time in about a week this morning everything worked fine.
This is running v0.16.11 of the extension in VS Code 1.46.1, Julia 1.4.2 on Windows 10.

After rolling back to 0.16.9, I have now been working for about 30 minutes without this issue turning up.

[aviatesk]

Feels like duplicate of julia-vscode/LanguageServer.jl#630 ?

[chrisbrahms]

Feels like duplicate of julia-vscode/LanguageServer.jl#630 ?

I can't pretend to follow all of that discussion, but I don't think so since that is about CPU usage (infinite loops), which isn't my problem. Though not loading Revise does seem to fix it, so it may be related.

[davidanthoff]

Hm, the 28% percent CPU usage does suggest an infinite loop. Presumably you have something like a quad core machine? 25% CPU usage is the max for a single threaded process like Julia in that case...

But this might also be the symbol server process. I wish we could somehow set the title of these processes so that we could distinguish them....

[odow]

I noticed this as well over the last couple of days, but I can't seem to figure out how to reliably trigger it.

Also maxing out the memory and one CPU thread. The process often stays alive after I quit VSCode, and I have to manually kill it via the activity monitor.

julia> versioninfo()
Julia Version 1.4.2
Commit 44fa15b150* (2020-05-23 18:35 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin18.7.0)
  CPU: Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)
Environment:
  JULIA_EDITOR = "/Applications/Visual Studio Code.app/Contents/Resources/app/bin/code"
  JULIA_NUM_THREADS = 

Will investigate and try to reproduce.

[AIxer]

That's what happened to me!

[davidanthoff]

@ZacLN do we need more loop trips to narrow that down?

Had this issue last tuesday, Julia process wasn't ended after I force quit VSCode

[niuzehao]

Also had that issue on VS code for Mac.

julia> versioninfo()
Julia Version 1.4.1
Commit 381693d3df* (2020-04-14 17:20 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin18.7.0)
  CPU: Intel(R) Core(TM) i7-8559U CPU @ 2.70GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)

I was able to reproduce the memory leak (first half of the screenshot) in two steps:

1. start VS code, which will also start the Julia extension
2. opening a julia REPL.

Interestingly, after I force stop the julia in activity monitor and repeated step 1 only, the memory leak does not happen (second half of the screenshot).

[AndiMD]

For me, this happens when I just work in the text editor. Especially when I press tab to autocomplete (not always, but easily reproducible). Fills 32GB of RAM quickly on my Linux box, Plugin v0.16.11, Julia 1.4.2

[rodrigomha]

For me, this happens when I just work in the text editor. Especially when I press tab to autocomplete (not always, but easily reproducible). Fills 32GB of RAM quickly on my Linux box, Plugin v0.16.11, Julia 1.4.2

Me too. I reverted back to 0.16.8 for now. Not sure if it fixes it though.

[thchr]

Can report same problem here; excessive memory usage that doesn't go away unless the Julia process is manually killed from the Task Manager.

Julia Version 1.4.0
Commit b8e9a9ecc6 (2020-03-21 16:36 UTC)       
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
  WORD_SIZE: 64    
  LIBM: libopenlibm
  LLVM: libLLVM-8.0.1 (ORCJIT, skylake)
Environment:
  JULIA_NUM_THREADS = 8
  JULIA_EDITOR = "C:\Program Files\Microsoft VS Code\Code.exe"

[dlfivefifty]

I'm seeing this too. How do I revert to 0.16.8?

[pfitzseb]

Can any of you share the code you were working on when this happened?

[AndiMD]

@dlfivefifty
Does this work?

[AndiMD]

@pfitzseb
Running this code 2-3 times (send code to repl without REPL restart), and pressing tab a few times to autocomplete, e.g. after VsCodeBug. reproduces this

module VscodeBug

    import Statistics: mean
    using DiffEqOperators, OrdinaryDiffEq
    using Plots
    greet() = print("Hello World!")

end # module

using .VscodeBug

x=4
VscodeBug. # press tab

This is confusing, I reproduced this twice, now I can't reproduce it after several tries...