Quote:
Originally Posted by phil_ga
Can any one answer about the conditions under which opf files are actually saved to disk? I bet never, untill you do the backup manually (about 5 hours for my library).
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Any time you change the metadata for a book, the database is updated and the OPF file is also updated. If it was only done when users requested it the object of having it in the first place would be largely defeated. It is meant to allow you to recover from an unpredictable event (database damage) so the OPF files need to be kept as up-to-date as possible.
Compacting the database might regain some space, but is unlikely to improve performance (it may even have the opposite effect). It is perfectly normal for a database to have unused space internally as pages are marked as free when a record is deleted, but the space is not removed from the file. These 'free' pages get re-used when required.
In terms of the performance issue - do you have the "Search as you type" option set under Preferences->Interface->Searching. I could see that severely impacting perceived performance. I much prefer searching to only occur when I press Enter so I always have it switched off. I am not sure what the default is on a new installation.