add sync= off and read_uncommited=true to improve perf

services/clsi/app/coffee/db.coffee

@@ -17,6 +17,8 @@ sequelize = new Sequelize(
 if Settings.mysql.clsi.dialect == "sqlite"
 	logger.log "running PRAGMA journal_mode=WAL;"
 	sequelize.query("PRAGMA journal_mode=WAL;")
+	sequelize.query("PRAGMA synchronous=OFF;")
+	sequelize.query("PRAGMA read_uncommitted = true;")
 
 module.exports =
 	UrlCache: sequelize.define("UrlCache", {