kernel tuning for cloud VM

[Jeff Peng]

Hello

I am using the VMs from big providers such as AWS and Azure.
most of the VMs are 2core/4gb ram/100gb disk etc.
They are used for running the regular web services (java, php etc), with 
debian 11 installed.

Every VM I just use the default system configuration.
Do I need to update some kernel config for the VMs? such as 
socket_buffer, max_fd etc. what's the suggested options for this kind of 
VM?

Thanks.