Quote:
Originally Posted by sgmoore
What sort of changes are you doing?
I got hit with an issue where I tagged a book without looking at what I was typing and without realising that my capslock was on. So the book ended up being tagged mYSTERY instead of Mystery.
Calibre then spent a long time updating the opf files for all the other books that had been tagged as Mystery to make them all say mYSTERY
So sometimes updating one book can affect lots of other records.
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But a case change is just 1 DB write. This is a Relational DB so the Tag table was the min change.
Dirty bit also gets set for all uses (that triggers the backup creation metadata.opf)