[Bug]: VFS on Linux

[hugomilan]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

I'm using Nextcloud client on a Ubuntu 24.04 desktop. I was able to activate Virtual File Support. The files were synchronized nicely with the server and were downloading fast. However, sometimes, when starting the system, virtual files are not downloaded fast--they take a long time to download. I suspect that a task must be running with Nextcloud (using almost 100% of a thread), such that the requested download gets in the line for downloading and has to wait the other task to be completed first. Is there a workaround? Such as launching another instance of Nextcloud just to download the files we are needing at the specific time?

I installed Nextcloud through the PPA, as AppImage was crashing when enabling Virtual Files (or experimental options, I don't clearly recall).

As a side note, we have more than 600k files in our server. We have increased inotify to about 1 million.

Steps to reproduce

Open a virtual file. It will take a long time to open.

Expected behavior

Download the virtual file instantaneously.

Which files are affected by this bug

All files

Operating system

Linux

Which version of the operating system you are running.

Ubuntu 24.04

Package

Other

Nextcloud Server version

28.0.9

Nextcloud Desktop Client version

3.15.2

Is this bug present after an update or on a fresh install?

Fresh desktop client install

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

Additional info

No response