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ad566d0cb6
Deep pagination over songs sorted by title (WHERE missing/library_id, ORDER BY order_title LIMIT/OFFSET - the shape Jellyfin clients use to enumerate the library, and non-admin native/Subsonic song lists share) walked media_file_order_title and fetched the table row for every skipped entry just to evaluate the filter and the annotation/bookmark join keys: offset+limit random reads, seconds per page on cold spinning disks. The new (missing, library_id, order_title, id) index makes the offset skip fully index-resident: filter columns and the join key come from the index, and only the emitted page touches table rows. Measured on a 96K-track library: offset 50000 drops from ~6.5s (poisoned stats) / ~100ms (good stats, warm) to 24ms, and cold deep pages on NAS hardware from ~7s to ~0.5s. |
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| .. | ||
| migrations | ||
| backup.go | ||
| backup_test.go | ||
| db.go | ||
| db_test.go | ||
| export_test.go | ||