Quote:
Originally Posted by davidfor
As PeterT said, the database contains details about every book on the device. There is at least two rows per book. Plus one for each entry in the TOC for epubs and PDF and two for each TOC entry in a kepub. Some of these rows have a lot of information. For example, the full synopsis in in one of them. That can be a few KB. For curiosity, I pulled all the rows out for a kepub once. The was about 75KB of data for that one book. That didn't include any database overhead (indexes etc) or bookmarks or Beyond-The-Book entries.
But, 128MB seems big. I have about 1200 books and mine is about 24MB. The Kobo Utilities plugin mentioned has a database compress option. This might reduce size, but not always.
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At my current ~2100 books, the database is hitting 153MB. This growth seems pretty linear as I've added more books. I do use Calibre to grab the metadata for each new book which adds to the database size.
This is about 4 days after a factory reset, prior to the factory reset, the database was close to 159MB.
Regards,
David