[Koha-bugs] [Bug 27584] Improve OAI-PMH provider performance

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27584

--- Comment #1 from Ere Maijala <ere.maijala at helsinki.fi> ---
Created attachment 116184
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=116184&action=edit
Bug 27584: Refactor OAI-PMH paging to improve performance

Uses next biblionumber instead of large offset in the queries.

Test plan:

1. Without the patch, try harvesting a Koha database with `include_items: 1` in
the OAI-PMH configuration file pointed to by preference OAI-PMH:ConfFile and
take note of performance. For useful metrics the database must be large enough
to not fit in InnoDB buffers or OS file cache.
2. Apply the patch.
3. Run tests: prove -v t/db_dependent/OAI
4. Try again the harvesting from step 1 and compare performance with step 1.

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