2 commits

Author	SHA1	Message	Date
Deluan	65f6bc2526	feat(pglite): run Navidrome on the embedded PostgreSQL end to end ... Replace the 131 SQLite migrations with a single goose migration that creates the whole schema in PostgreSQL (the user table becomes user_account, json columns become jsonb, seed rows for the default library and transcodings). Port the repositories' SQL just far enough for Navidrome to start, scan, log in and browse artists and albums: json_agg/jsonb_* for the SQLite JSON functions, lower() for COLLATE NOCASE, ON CONFLICT DO NOTHING, coalesce on annotations, stricter GROUP BY, explicit casts under the simple protocol, sequential queries in library.RefreshStats. db/ is now Postgres-only, with backup/restore stubbed and DevExternalScanner forced off. Embed the PGlite module like go-taglib: pglite.wasi.gz is go:embed'ed, decompressed in memory and compiled by wazero with an on-disk compilation cache, so the module itself is never written to disk. The cluster is created by initdb at runtime on the first start; initdb runs in a throwaway wasm instance and the backend in a fresh one, otherwise the next start cannot find a valid checkpoint. Since initdb creates only template1, a short-lived backend then runs CREATE DATABASE navidrome and the real backend starts on it. The build recipe and patches for the -O2, no-wizer module live in db/pglite/build.	2026-09-04 20:41:52 -04:00
Deluan Quintão	cc315dcc8c	perf(db): keep query planner statistics trustworthy with full ANALYZE (#5740) ... * perf(db): keep query planner statistics trustworthy with full ANALYZE PRAGMA optimize's internal ANALYZE runs with a limited analysis budget (~2000 rows) that writes wrong sqlite_stat1 entries for low-cardinality indexes: on a 96K-track library it claimed (missing, library_id) narrows to ~2000 rows when it matches the whole table. The planner then prefers that index over the sort index and falls back to a full-table temp B-tree sort per request, turning paginated song listings into multi-second queries (reproduced at 5.5s on real hardware; ~90x slower than with correct stats). Every index-creating migration re-triggered the poisoning via the post-migration optimize, and the daily optimizer could re-trigger it on large library changes. Setting analysis_limit on the connection does not help: optimize ignores it. Run a plain full ANALYZE instead: after migrations with schema changes, and in db.Optimize (daily schedule and scan-end). Stats are stored in the database file, so one connection suffices and the per-connection pool loop is gone. The Optimize call at shutdown is removed: stats are maintained at migration/scan/daily points, and an ANALYZE during shutdown only delays it and races container stop timeouts. * perf(db): drop startup PRAGMA optimize that re-poisons planner stats The startup PRAGMA optimize=0x10002 runs SQLite's budget-limited internal ANALYZE (bit 0x02), which writes truncated sqlite_stat1 rows for low-cardinality indexes -- the exact statistics-poisoning this PR set out to eliminate. Because DevOptimizeDB defaults to true, a restart with no pending migrations would re-poison the planner until the next scan or daily Optimize. Remove it: statistics are already refreshed with a full ANALYZE after schema-changing migrations (Init) and via Optimize at scan-end and on the daily schedule, so nothing on the startup path needs to touch them. Also clarify that Optimize is a no-op unless DevOptimizeDB is enabled. * chore(db): remove the DevOptimizeDB flag and skip Optimize on quick scans The flag only gated the optimize/ANALYZE maintenance calls and there is no reason to leave planner statistics unmaintained; the guards are gone along with the flag. The scan-end Optimize now runs only after full scans — quick scans barely move the statistics, and the daily schedule covers drift. * style(scanner): drop redundant comment in runOptimize * chore(persistence): drop the no-op PRAGMA optimize from ScanEnd Mask 0x10000 only selects candidate tables by size change; without the 0x02 action bit optimize does nothing (verified: sqlite_stat1 stays stale after a 100x table growth). The scan-end statistics refresh is db.Optimize's full ANALYZE, and the expression-collation-index concern the old comment guarded against no longer applies. * fix(scanner): run the post-scan ANALYZE in the server process With the external scanner (the default), the scan pipeline runs in a subprocess, so its ANALYZE was invisible to the server: SQLite loads sqlite_stat1 into the process's shared schema cache, and an ANALYZE from another process does not refresh it — verified with the production DSN that even brand-new pool connections keep planning with the old statistics until the server restarts. An in-process ANALYZE, by contrast, is immediately visible to every pooled connection through the same shared cache. Move the full-scan Optimize from the scanner pipeline to the scan controller, which always runs in the server process. * fix(scanner): honor promoted full scans in the optimize gate A quick scan resuming an interrupted full scan is promoted inside the scanner (possibly in a subprocess); mirror the promotion in the controller so the post-scan ANALYZE isn't skipped. * refactor: apply cleanup review findings - drop forceFullRescan's inline ANALYZE: Init already runs a full ANALYZE after any migration batch with schema changes, so upgrades including a full-rescan migration analyzed the whole DB twice - resumingFullScan uses a filtered CountAll instead of fetching and scanning all libraries - document why CallScan (CLI) deliberately skips the post-scan Optimize * perf(db): make planner analysis maintenance resilient Check analysis freshness every 30 minutes and refresh statistics when the last successful run is over 24 hours old or a scan marked them pending. Persist successful analysis state, retry skipped or failed maintenance, coordinate checks with scans, and cover standalone CLI full scans. * perf(db): avoid analyzing routine quick-scan changes Reserve pending analysis for full scans, unscanned libraries, and retry state. Incremental quick scans now rely on the 24-hour freshness window instead of triggering a full ANALYZE at the next maintenance check. * fix(scan): analyze resumed full scans in CLI * fix(db): back off failed analysis retries * feat(db): allow disabling scheduled analysis * test(db): remove redundant analysis coverage * refactor(db): split ANALYZE maintenance into optimize.go and dedupe call sites - move query-planner statistics code from db.go to its own optimize.go (and matching optimize_test.go) - log ANALYZE elapsed time inside Optimize/OptimizeIfNeeded instead of repeating the timing block at every call site - drop the LastDBAnalyzeAttemptAt write on success: it is only read while failures >= 1, and every failure rewrites it first - extract runPostScanAnalysis (cmd) and anyIncludedLibrary (scanner) helpers	2026-07-13 12:04:29 -04:00