Quote:
Originally Posted by theducks
That is a lot of books 
You can set up an 'Auto-Add' folder.
Then drop 20-40 copies (it deletes from the folder as it adds) into it at at a time.This way some housekeeping (garbage cleanup) gets done.
You might get away with more...
Why risk a crash and lose all work  |
9 out of 10 times calibre crashes or takes so long is with adding pdf files with get metadata from file enabled . If your books are named properly that you can get the metadata from filename. I would recommend disabling read metadata from file option