Conditionally use files in org-roam

[juh]

Dear all,

I have 10.800 files in my roam directory. 10.000 files are not used 
often. The huge amount of files make org-roam slow on my simple 
notebook. Is it possible to conditionally load files into roam only if I 
really need them?

I am aware that some references would be broken most of the time.

TIA
juh