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Improve website performance with db indexes #2969

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Improve website performance with db indexes #2969

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f1df355
Add history indexes
tiramisuflavor Jul 11, 2025
88011c4
Add indexes for listing episodes pages
tiramisuflavor Jul 11, 2025
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28 changes: 27 additions & 1 deletion bazarr/app/database.py
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Original file line number Diff line number Diff line change
Expand Up @@ -90,7 +90,6 @@ def _stop_worker_threads():
Base = declarative_base()
metadata = Base.metadata


class System(Base):
__tablename__ = 'system'

Expand Down Expand Up @@ -309,6 +308,9 @@ def init_db():
# Create tables if they don't exist.
metadata.create_all(engine)

# Apply any missing index
ensure_indexes()


def create_db_revision(app):
logging.info("Creating a new database revision for future migration")
Expand Down Expand Up @@ -568,3 +570,27 @@ def fix_languages_profiles_with_duplicate_ids():
.values({"items": json.dumps(languages_profile_items)})
.where(TableLanguagesProfiles.profileId == languages_profile.profileId)
)

def ensure_indexes():
"""Create indexes needed for fast look‑ups (no‑op if they exist)."""
index_ddl = [
# Series history
"CREATE INDEX IF NOT EXISTS idx_table_history_timestamp ON table_history (timestamp)",
"CREATE INDEX IF NOT EXISTS idx_table_history_action ON table_history (action)",
"CREATE INDEX IF NOT EXISTS idx_table_history_provider ON table_history (provider)",
"CREATE INDEX IF NOT EXISTS idx_table_history_language ON table_history (language)",

# Movie history
"CREATE INDEX IF NOT EXISTS idx_table_history_movie_timestamp ON table_history_movie (timestamp)",
"CREATE INDEX IF NOT EXISTS idx_table_history_movie_action ON table_history_movie (action)",
"CREATE INDEX IF NOT EXISTS idx_table_history_movie_provider ON table_history_movie (provider)",
"CREATE INDEX IF NOT EXISTS idx_table_history_movie_language ON table_history_movie (language)",

# Episodes
"CREATE INDEX IF NOT EXISTS idx_table_episodes_episodeid ON table_episodes (sonarrEpisodeId)",
"CREATE INDEX IF NOT EXISTS idx_table_episodes_seriesid_season_episode ON table_episodes (sonarrSeriesId, season DESC, episode DESC)",
]

with engine.begin() as conn:
for ddl in index_ddl:
conn.execute(text(ddl))