diff --git a/.gitignore b/.gitignore
index 30bb0b8..2a37d12 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,4 +35,5 @@ test/report
 doc_compiled.md
 docs-md/cn/doc.md
 docs-md/en/doc.md
-docs/gitbook/gitbook-plugin-livereload/
\ No newline at end of file
+docs/gitbook/gitbook-plugin-livereload/
+node_modules
diff --git a/lib/recorder.js b/lib/recorder.js
index 525ff0c..d4decf7 100644
--- a/lib/recorder.js
+++ b/lib/recorder.js
@@ -86,11 +86,22 @@ class Recorder extends events.EventEmitter {
     this.globalId = 1;
     this.cachePath = getCacheDir();
     this.db = new Datastore();
-    this.db.persistence.setAutocompactionInterval(5001);
 
     this.recordBodyMap = [];  // id - body
   }
 
+  setDbAutoCompact() {
+    this.db.persistence.setAutocompactionInterval(5001);
+  }
+
+  stopDbAutoCompact() {
+    try {
+      this.db.persistence.stopAutocompaction();
+    } catch (e) {
+      logUtil.printLog(e, logUtil.T_ERR);
+    }
+  }
+
   emitUpdate(id, info) {
     const self = this;
     if (info) {
@@ -333,6 +344,7 @@ class Recorder extends events.EventEmitter {
   }
 
   clear() {
+    logUtil.printLog('clearing cache file...');
     const self = this;
     proxyUtil.deleteFolderContentsRecursive(self.cachePath, true);
   }
diff --git a/lib/util.js b/lib/util.js
index 0d6a78c..bfe9644 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -216,8 +216,6 @@ function deleteFolderContentsRecursive(dirPath, ifClearFolderItself) {
     throw new Error('can_not_delete_this_dir');
   }
 
-  logUtil.info('==>>> clearing cache ', dirPath);
-
   if (fs.existsSync(dirPath)) {
     fs.readdirSync(dirPath).forEach((file) => {
       const curPath = path.join(dirPath, file);
diff --git a/lib/webInterface.js b/lib/webInterface.js
index f3041a9..8d1925d 100644
--- a/lib/webInterface.js
+++ b/lib/webInterface.js
@@ -308,11 +308,15 @@ class webInterface extends events.EventEmitter {
   }
 
   close() {
-    this.server && this.server.close();
-    this.wsServer && this.wsServer.closeAll();
-    this.server = null;
-    this.wsServer = null;
-    this.proxyInstance = null;
+    const self = this;
+    return new Promise((resolve, reject) => {
+      self.server && self.server.close();
+      self.wsServer && self.wsServer.closeAll();
+      self.server = null;
+      self.wsServer = null;
+      self.proxyInstance = null;
+      resolve();
+    });
   }
 }
 
diff --git a/proxy.js b/proxy.js
index 2977acb..841faa5 100644
--- a/proxy.js
+++ b/proxy.js
@@ -248,7 +248,6 @@ class ProxyCore extends events.EventEmitter {
     return self;
   }
 
-
   /**
    * close the proxy server
    *
@@ -326,54 +325,47 @@ class ProxyServer extends ProxyCore {
   }
 
   start() {
+    if (this.recorder) {
+      this.recorder.setDbAutoCompact();
+    }
+
     // start web interface if neeeded
     if (this.proxyWebinterfaceConfig && this.proxyWebinterfaceConfig.enable) {
       this.webServerInstance = new WebInterface(this.proxyWebinterfaceConfig, this.recorder);
       // start web server
-      this.webServerInstance.start().then(() => {
-        // start proxy core
-        super.start();
-      })
-      .catch((e) => {
-        this.emit('error', e);
-      });
+      this.webServerInstance.start()
+      // start proxy core
+        .then(() => {
+          super.start();
+        })
+        .catch((e) => {
+          this.emit('error', e);
+        });
     } else {
       super.start();
     }
   }
 
   close() {
-    return new Promise((resolve, reject) => {
-      super.close()
-        .then((error) => {
-          if (error) {
-            resolve(error);
-          }
-        });
+    const self = this;
+    // release recorder
+    if (self.recorder) {
+      self.recorder.stopDbAutoCompact();
+      self.recorder.clear();
+    }
+    self.recorder = null;
 
-      if (this.recorder) {
-        logUtil.printLog('clearing cache file...');
-        this.recorder.clear();
-      }
-      const tmpWebServer = this.webServerInstance;
-      this.recorder = null;
-      this.webServerInstance = null;
-      if (tmpWebServer) {
-        logUtil.printLog('closing webserver...');
-        tmpWebServer.close((error) => {
-          if (error) {
-            console.error(error);
-            logUtil.printLog(`proxy web server close FAILED: ${error.message}`, logUtil.T_ERR);
-          } else {
-            logUtil.printLog(`proxy web server closed at ${this.proxyHostName} : ${this.webPort}`);
-          }
-
-          resolve(error);
-        })
-      } else {
-        resolve(null);
-      }
-    });
+    // close ProxyCore
+    return super.close()
+      // release webInterface
+      .then(() => {
+        if (self.webServerInstance) {
+          const tmpWebServer = self.webServerInstance;
+          self.webServerInstance = null;
+          logUtil.printLog('closing webInterface...');
+          return tmpWebServer.close();
+        }
+      });
   }
 }