diff --git a/server/cmd/server/main.go b/server/cmd/server/main.go
index f941997..66e6bfb 100644
--- a/server/cmd/server/main.go
+++ b/server/cmd/server/main.go
@@ -10,6 +10,7 @@ import (
 	"server/internal/db"
 	"server/internal/logging"
 	"server/internal/repo"
+	"sync"
 	"time"
 )
 
@@ -35,13 +36,15 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	// apply pool settings from env for YMT
+	// apply default pool settings, can be overridden by env
+	applyDefaultPool(ymt)
 	db.ApplyPoolFromEnv(ymt, "YMT_DB_")
 	marketing, err := db.ConnectMySQL(cfg.MarketingDB.DSN())
 	if err != nil {
 		log.Fatal(err)
 	}
-	// apply pool settings from env for Marketing
+	// apply default pool settings, can be overridden by env
+	applyDefaultPool(marketing)
 	db.ApplyPoolFromEnv(marketing, "MARKETING_DB_")
 	// Marketing Authorization DB for creators
 	var marketingAuth *sql.DB
@@ -50,6 +53,7 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
+		applyDefaultPool(marketingAuth)
 		db.ApplyPoolFromEnv(marketingAuth, "MARKETING_AUTH_DB_")
 		log.Println("connecting Marketing Authorization MySQL:", cfg.MarketingAuthorizationDB.Host+":"+cfg.MarketingAuthorizationDB.Port, "db", cfg.MarketingAuthorizationDB.Name)
 	} else {
@@ -60,6 +64,7 @@ func main() {
 		log.Fatal(err)
 	}
 	// apply pool settings from env for Meta (templates/jobs)
+	applyDefaultPool(meta)
 	db.ApplyPoolFromEnv(meta, "YMT_TEST_DB_")
 	// Marketing Reseller DB
 	var resellerDB *sql.DB
@@ -91,7 +96,7 @@ func main() {
 	log.Fatal(srv.ListenAndServe())
 }
 
-// recoverRunningJobs 恢复服务中断前未完成的导出任务
+// recoverRunningJobs 恢复服务中断前未完成的导出任务（最多并发3个）
 func recoverRunningJobs(meta, marketing, marketingAuth, resellerDB, ymt *sql.DB) {
 	rrepo := repo.NewExportRepo()
 
@@ -112,16 +117,34 @@ func recoverRunningJobs(meta, marketing, marketingAuth, resellerDB, ymt *sql.DB)
 	// 创建一个 ExportsAPI 实例用于恢复任务
 	exportsAPI := &api.ExportsAPI{Meta: meta, Marketing: marketing, YMT: ymt}
 
+	// 使用信号量限制并发数（最多3个）
+	semaphore := make(chan struct{}, 3)
+	var wg sync.WaitGroup
+
 	// 启动每个任务的恢复
 	for _, job := range jobs {
-		jobID := job.ID
-		log.Printf("[任务恢复] 启动任务恢复 - ID: %d\n", jobID)
-		// 通过 goroutine 并行启动任务恢复
-		go exportsAPI.RunJobByID(jobID)
+		wg.Add(1)
+		go func(jobID uint64) {
+			defer wg.Done()
+			semaphore <- struct{}{}        // 获取信号量
+			defer func() { <-semaphore }() // 释放信号量
+
+			log.Printf("[任务恢复] 启动任务恢复 - ID: %d\n", jobID)
+			exportsAPI.RunJobByID(jobID)
+		}(job.ID)
 	}
 
-	// 给予一点时间让 goroutine 启动
-	time.Sleep(1 * time.Second)
+	// 等待所有任务启动完成
+	wg.Wait()
+	log.Println("[任务恢复] 所有任务已启动")
 }
 
 // buildDSN deprecated; use cfg.YMTDB.DSN()/cfg.MarketingDB.DSN()
+
+// applyDefaultPool 应用连接池默认值
+func applyDefaultPool(db *sql.DB) {
+	db.SetMaxOpenConns(25)                  // 最多25个开放连接
+	db.SetMaxIdleConns(5)                   // 保持5个空闲连接
+	db.SetConnMaxLifetime(time.Hour)        // 连接最长生存时间1小时
+	db.SetConnMaxIdleTime(10 * time.Minute) // 连接空闲10分钟后关闭
+}