Hey @Chenkai, thanks for the question.
Is the performance related to server memory size or is there any configuration?
Yes, there is a configuration file.
Is there a limit on the size of documents loaded by Collaborator Online?
No. Not limits in memory, but it does limit load time.
Back in 2021, mmeeks described how to tweak:
coolwsd.xml= the main Collabra Online settings file- +
limit_load_secs= the “don’t let a document load for longer than X seconds” setting
In the XML file, it describes:
“Maximum number of seconds to wait for a document load to succeed. 0 for unlimited.”
so if you change it to 0, that would let Collabora take as long as it needs to load some behemoth-sized document.
By default though, these limits are in place so one runaway user/document can’t suck up all the resources and jam up everyone else.
If you’re the only one using it, or if you’re going to only have a handful of trustworthy users using Collabora, then sure, make it unlimited. 