Theoretical or practical library size limit?

Besides the storage sizes in the various paid plans, I couldn't find any information on the size limit that a zotero library can reasonably handle. I was curious as my Zotero appears to have been slowing down/crashing more as my library grows. I do have the unlimited plan.
  • Storage subscription is unrelated to library size (beyond, of course, your ability to sync attachments).

    Generally, and especially on Windows, Zotero 7 will work much better with large libraries. If you've been seeing crashes on Zotero 6 on Windows, these were very likely out of memory crashes that are much less of an issue with Z7 (which is a 64-bit app by default) Even with Zotero 6, though, libraries with ~20k items are the norm, and even libraries with ~100k items aren't unheard of, though you should expect some performance issues.
    We know of libraries with up to 500k items, but that's getting iffy, performance-wise.

    All of these limits are practical and also depend on the hardware used, of course. There are not theoretical limits imposed on library size.
  • edited November 1, 2023
    Thank you! Apparently I am running Z6, so I will see if I can update it.
  • Currently in beta, but has been for months now and is quite stable:
    Biggest concern before updating are incompatible add-ons (Zutilo and ZotFile, most prominently)
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