fix db WAL memory leak #1056

cronjob/WALCheckpointJob.go

@@ -13,8 +13,7 @@ func NewWALCheckpointJob() *WALCheckpointJob {
 
 func (s *WALCheckpointJob) Run() {
 	db := database.GetDB()
-	_, err := db.Raw("PRAGMA wal_checkpoint(FULL)").Rows()
-	if err != nil {
+	if err := db.Exec("PRAGMA wal_checkpoint(FULL)").Error; err != nil {
 		logger.Error("Error checkpointing WAL: ", err.Error())
 	}
 }

database/db.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"path"
 	"strings"
+	"time"
 
 	"github.com/alireza0/s-ui/config"
 	"github.com/alireza0/s-ui/database/model"
@@ -56,11 +57,22 @@ func OpenDB(dbPath string) error {
 	}
 	dsn := dbPath + sep + "_busy_timeout=10000&_journal_mode=WAL"
 	db, err = gorm.Open(sqlite.Open(dsn), c)
+	if err != nil {
+		return err
+	}
+
+	sqlDB, err := db.DB()
+	if err != nil {
+		return err
+	}
+	sqlDB.SetMaxOpenConns(25)
+	sqlDB.SetMaxIdleConns(5)
+	sqlDB.SetConnMaxLifetime(time.Hour)
 
 	if config.IsDebug() {
 		db = db.Debug()
 	}
-	return err
+	return nil
 }
 
 func InitDB(dbPath string) error {

service/client.go

@@ -378,8 +378,7 @@ func (s *ClientService) DepleteClients() ([]uint, error) {
 	defer func() {
 		if err == nil {
 			tx.Commit()
-			_, err1 := db.Raw("PRAGMA wal_checkpoint(FULL)").Rows()
-			if err1 != nil {
+			if err1 := db.Exec("PRAGMA wal_checkpoint(FULL)").Error; err1 != nil {
 				logger.Error("Error checkpointing WAL: ", err1.Error())
 			}
 		} else {