chore(db): enable auto-vacuum and add periodic maintenance#36851
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One-time migration: detect auto_vacuum = 0 (NONE) and switch to INCREMENTAL. Run a full VACUUM to apply the mode change. Subsequent database opens skip this since the mode persists. This prevents the database file from growing indefinitely as deleted rows leave behind free pages that are never reclaimed.
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Issue for this PR
Closes #31526
Type of change
What does this PR do?
Enables SQLite incremental auto-vacuum and adds maintenance utilities:
One-time migration: detects
auto_vacuum = 0(NONE) and switches toINCREMENTAL. Runs a fullVACUUMto apply the mode change. Subsequent database opens skip this since the mode persists.checkpoint(): runsPRAGMA wal_checkpoint(TRUNCATE)to flush the WAL file and reclaim disk space.vacuum(): runsPRAGMA incremental_vacuumto reclaim free pages from deleted rows.These can be called periodically (e.g., on session idle) to keep database size in check.
Re-filing of #23053 which was auto-closed by the cleanup bot.
How did you verify your code works?
Tested locally by checking
PRAGMA auto_vacuumbefore and after the migration. Verified the one-time VACUUM runs on first open and is skipped on subsequent opens. Testedcheckpoint()andvacuum()functions directly.Screenshots / recordings
N/A — database maintenance improvement.
Checklist