diff --git a/agent/src/monitor.rs b/agent/src/monitor.rs
index ac08f92cf41..999d67b4254 100644
--- a/agent/src/monitor.rs
+++ b/agent/src/monitor.rs
@@ -233,7 +233,7 @@ impl RefCountable for SysStatusBroker {
             CounterValue::Unsigned(self.config.load().sys_free_memory_limit as u64),
         ));
 
-        match get_file_and_size_sum(self.log_dir.clone()) {
+        match get_file_and_size_sum(&self.log_dir) {
             Ok(file_and_size_sum) => {
                 metrics.push((
                     "log_file_size_sum",
diff --git a/agent/src/trident.rs b/agent/src/trident.rs
index f149553789f..a16e53fd321 100644
--- a/agent/src/trident.rs
+++ b/agent/src/trident.rs
@@ -968,7 +968,7 @@ pub struct DomainNameListener {
 }
 
 impl DomainNameListener {
-    const INTERVAL: u64 = 5;
+    const INTERVAL: Duration = Duration::from_secs(5);
 
     fn new(
         stats_collector: Arc<stats::Collector>,
@@ -979,14 +979,11 @@ impl DomainNameListener {
         agent_id_tx: Arc<broadcast::Sender<AgentId>>,
     ) -> DomainNameListener {
         Self {
-            stats_collector: stats_collector.clone(),
+            stats_collector,
             session,
-
-            domain_names: domain_names.clone(),
-            ips: ips.clone(),
-
+            domain_names,
+            ips,
             sidecar_mode,
-
             thread_handler: None,
             stopped: Arc::new(AtomicBool::new(false)),
             agent_id_tx,
@@ -1035,7 +1032,7 @@ impl DomainNameListener {
                 .name("domain-name-listener".to_owned())
                 .spawn(move || {
                     while !stopped.swap(false, Ordering::Relaxed) {
-                        thread::sleep(Duration::from_secs(Self::INTERVAL));
+                        thread::sleep(Self::INTERVAL);
 
                         let mut changed = false;
                         for i in 0..domain_names.len() {
diff --git a/agent/src/utils/guard.rs b/agent/src/utils/guard.rs
index 32fa0e4ddae..c3f62d3d298 100644
--- a/agent/src/utils/guard.rs
+++ b/agent/src/utils/guard.rs
@@ -229,10 +229,10 @@ impl Guard {
                 let config = config.load();
                 let tap_mode = config.tap_mode;
                 let cpu_limit = config.max_cpus;
-                match get_file_and_size_sum(log_dir.clone()) {
+                match get_file_and_size_sum(&log_dir) {
                     Ok(file_and_size_sum) => {
                         let log_file_size = config.log_file_size; // Log file size limit (unit: M)
-                        let file_sizes_sum = file_and_size_sum.file_sizes_sum.clone(); // Total size of current log files (unit: B)
+                        let file_sizes_sum = file_and_size_sum.file_sizes_sum; // Total size of current log files (unit: B)
                         debug!(
                             "current log files' size: {}B, log_file_size_limit: {}B",
                             file_sizes_sum,
diff --git a/agent/src/utils/process/process.rs b/agent/src/utils/process/process.rs
index 3eeef3660c3..e7e9c21474c 100644
--- a/agent/src/utils/process/process.rs
+++ b/agent/src/utils/process/process.rs
@@ -68,10 +68,10 @@ impl Ord for FileInfo {
 }
 
 /// 获取指定路径下的所有文件的信息及文件大小总和（单位：B）
-pub fn get_file_and_size_sum(dir: String) -> io::Result<FileAndSizeSum> {
+pub fn get_file_and_size_sum(dir: &String) -> io::Result<FileAndSizeSum> {
     let mut file_and_size_sum = FileAndSizeSum::new();
     let mut file_infos = Vec::new();
-    let dir = Path::new(dir.as_str());
+    let dir = Path::new(dir);
     for item in fs::read_dir(dir)? {
         let file = match item {
             Ok(f) => f,