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Perform VACCUM once per week

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SukkaW 2024-01-15 16:24:49 +08:00
parent 333e2054d9
commit b55a7decb9
1 changed files with 17 additions and 2 deletions
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19
Build/lib/cache-filesystem.ts
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@ -69,18 +69,33 @@ export class Cache {
if (tbd != null) this.tbd = tbd; if (tbd != null) this.tbd = tbd;
const db = new Database(path.join(this.cachePath, 'cache.db')); const db = new Database(path.join(this.cachePath, 'cache.db'));
db.exec('PRAGMA journal_mode = WAL');
db.exec('PRAGMA journal_mode = WAL;');
db.exec('PRAGMA synchronous = normal;');
db.exec('PRAGMA temp_store = memory;');
db.exec('PRAGMA optimize;');
db.prepare('CREATE TABLE IF NOT EXISTS cache (key TEXT PRIMARY KEY, value TEXT, ttl REAL NOT NULL);').run(); db.prepare('CREATE TABLE IF NOT EXISTS cache (key TEXT PRIMARY KEY, value TEXT, ttl REAL NOT NULL);').run();
db.prepare('CREATE INDEX IF NOT EXISTS cache_ttl ON cache (ttl);').run(); db.prepare('CREATE INDEX IF NOT EXISTS cache_ttl ON cache (ttl);').run();
const date = new Date();
// perform purge on startup // perform purge on startup
// ttl + tbd < now => ttl < now - tbd // ttl + tbd < now => ttl < now - tbd
const now = Date.now() - this.tbd; const now = date.getTime() - this.tbd;
db.prepare('DELETE FROM cache WHERE ttl < ?').run(now); db.prepare('DELETE FROM cache WHERE ttl < ?').run(now);
this.db = db; this.db = db;
const dateString = `${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()}`;
const lastVaccum = this.get('__LAST_VACUUM');
if (lastVaccum === undefined || (lastVaccum !== dateString && date.getUTCDay() === 6)) {
console.log(picocolors.magenta('[cache] vacuuming'));
this.set('__LAST_VACUUM', dateString, 10 * 365 * 60 * 60 * 24 * 1000);
this.db.exec('VACUUM;');
}
} }
set(key: string, value: string, ttl = 60 * 1000): void { set(key: string, value: string, ttl = 60 * 1000): void {