diff --git a/frontend/src/components/LogViewer/MonacoLogViewer.tsx b/frontend/src/components/LogViewer/MonacoLogViewer.tsx
index f2af88ab..df401571 100644
--- a/frontend/src/components/LogViewer/MonacoLogViewer.tsx
+++ b/frontend/src/components/LogViewer/MonacoLogViewer.tsx
@@ -1,18 +1,29 @@
 /**
  * Monaco日志查看器组件
  * 基于Monaco Editor实现的高性能只读日志查看器
+ * 
+ * 性能优化：
+ * - 直接操作Monaco Model，避免React状态更新
+ * - 批量追加日志，减少更新频率
+ * - 限制最大行数，防止内存溢出
  */
-import { useEffect, useRef, useState } from 'react';
+import { useEffect, useRef, useCallback } from 'react';
 import Editor, { Monaco } from '@monaco-editor/react';
 import type { editor } from 'monaco-editor';
 import type { MonacoLogViewerProps, LogViewerAPI } from './types';
 
+// 默认最大行数限制
+const DEFAULT_MAX_LINES = 10000;
+// 批量更新间隔(ms)
+const BATCH_INTERVAL = 50;
+
 export const MonacoLogViewer: React.FC<MonacoLogViewerProps> = ({
   autoScroll = true,
   fontSize = 12,
   theme = 'vs-dark',
   height = '100%',
   wordWrap = false,
+  maxLines = DEFAULT_MAX_LINES,
   onReady,
   className = '',
   style = {},
@@ -20,8 +31,12 @@ export const MonacoLogViewer: React.FC<MonacoLogViewerProps> = ({
   const editorRef = useRef<editor.IStandaloneCodeEditor | null>(null);
   const monacoRef = useRef<Monaco | null>(null);
   const autoScrollRef = useRef(autoScroll);
-  const [content, setContent] = useState('');
   const lineCountRef = useRef(0);
+  
+  // 批量更新缓冲区
+  const pendingLogsRef = useRef<string[]>([]);
+  const batchTimerRef = useRef<NodeJS.Timeout | null>(null);
+  const isReadyRef = useRef(false);
 
   // 更新自动滚动状态
   useEffect(() => {
@@ -37,17 +52,134 @@ export const MonacoLogViewer: React.FC<MonacoLogViewerProps> = ({
     }
   }, [wordWrap]);
 
+  // 清理定时器
+  useEffect(() => {
+    return () => {
+      if (batchTimerRef.current) {
+        clearTimeout(batchTimerRef.current);
+      }
+    };
+  }, []);
+
+  // 检查是否在底部附近
+  const isNearBottom = useCallback(() => {
+    if (!editorRef.current) return true;
+    const scrollTop = editorRef.current.getScrollTop();
+    const scrollHeight = editorRef.current.getScrollHeight();
+    const clientHeight = editorRef.current.getLayoutInfo().height;
+    return scrollHeight - scrollTop - clientHeight < 50;
+  }, []);
+
+  // 滚动到底部
+  const scrollToBottom = useCallback(() => {
+    if (!editorRef.current) return;
+    const model = editorRef.current.getModel();
+    if (model) {
+      const lineCount = model.getLineCount();
+      editorRef.current.revealLine(lineCount);
+    }
+  }, []);
+
+  // 直接追加文本到Monaco Model（高性能）
+  const appendToModel = useCallback((text: string) => {
+    if (!editorRef.current) return;
+    
+    const model = editorRef.current.getModel();
+    if (!model) return;
+
+    const shouldScroll = autoScrollRef.current && isNearBottom();
+    const lineCount = model.getLineCount();
+    const lastLineLength = model.getLineLength(lineCount);
+
+    // 使用 applyEdits 直接追加文本，避免重新解析整个文档
+    const prefix = lineCount === 1 && lastLineLength === 0 ? '' : '\n';
+    model.applyEdits([{
+      range: {
+        startLineNumber: lineCount,
+        startColumn: lastLineLength + 1,
+        endLineNumber: lineCount,
+        endColumn: lastLineLength + 1,
+      },
+      text: prefix + text,
+    }]);
+
+    // 更新行数
+    lineCountRef.current = model.getLineCount();
+
+    // 检查是否超过最大行数，删除旧日志
+    if (maxLines && lineCountRef.current > maxLines) {
+      const linesToRemove = lineCountRef.current - maxLines;
+      model.applyEdits([{
+        range: {
+          startLineNumber: 1,
+          startColumn: 1,
+          endLineNumber: linesToRemove + 1,
+          endColumn: 1,
+        },
+        text: '',
+      }]);
+      lineCountRef.current = model.getLineCount();
+    }
+
+    // 自动滚动到底部
+    if (shouldScroll) {
+      requestAnimationFrame(scrollToBottom);
+    }
+  }, [isNearBottom, scrollToBottom, maxLines]);
+
+  // 批量刷新日志
+  const flushPendingLogs = useCallback(() => {
+    if (pendingLogsRef.current.length === 0) return;
+    
+    const logs = pendingLogsRef.current;
+    pendingLogsRef.current = [];
+    batchTimerRef.current = null;
+
+    // 合并所有待处理日志
+    const text = logs.join('\n');
+    appendToModel(text);
+  }, [appendToModel]);
+
+  // 添加日志到缓冲区（批量处理）
+  const queueLog = useCallback((log: string) => {
+    pendingLogsRef.current.push(log);
+    
+    // 如果没有定时器，启动批量更新
+    if (!batchTimerRef.current) {
+      batchTimerRef.current = setTimeout(flushPendingLogs, BATCH_INTERVAL);
+    }
+  }, [flushPendingLogs]);
+
+  // 清空日志
+  const clearLogs = useCallback(() => {
+    if (!editorRef.current) return;
+    
+    const model = editorRef.current.getModel();
+    if (model) {
+      model.setValue('');
+      lineCountRef.current = 0;
+    }
+    
+    // 清空缓冲区
+    pendingLogsRef.current = [];
+    if (batchTimerRef.current) {
+      clearTimeout(batchTimerRef.current);
+      batchTimerRef.current = null;
+    }
+  }, []);
+
   // Monaco Editor挂载完成
-  const handleEditorDidMount = (editor: editor.IStandaloneCodeEditor, monaco: Monaco) => {
+  const handleEditorDidMount = useCallback((editor: editor.IStandaloneCodeEditor, monaco: Monaco) => {
     editorRef.current = editor;
     monacoRef.current = monaco;
+    isReadyRef.current = true;
 
     // 配置编辑器选项
     editor.updateOptions({
       readOnly: true,
       minimap: { enabled: false },
       scrollBeyondLastLine: false,
-      wordWrap: 'off',
+      wordWrap: wordWrap ? 'on' : 'off',
       lineNumbers: 'on',
       glyphMargin: false,
       folding: false,
@@ -55,64 +187,32 @@ export const MonacoLogViewer: React.FC<MonacoLogViewerProps> = ({
       lineNumbersMinChars: 6,
       renderLineHighlight: 'none',
       automaticLayout: true,
+      // 性能优化选项
+      renderWhitespace: 'none',
+      renderControlCharacters: false,
+      guides: { indentation: false },
+      occurrencesHighlight: 'off',
+      selectionHighlight: false,
       scrollbar: {
         vertical: 'visible',
         horizontal: 'visible',
         verticalScrollbarSize: 10,
         horizontalScrollbarSize: 10,
+        useShadows: false,
       },
     });
 
-    // 检查是否在底部附近
-    const isNearBottom = () => {
-      if (!editorRef.current) return true;
-      const scrollTop = editorRef.current.getScrollTop();
-      const scrollHeight = editorRef.current.getScrollHeight();
-      const clientHeight = editorRef.current.getLayoutInfo().height;
-      return scrollHeight - scrollTop - clientHeight < 50;
-    };
-
     // 暴露API
     if (onReady) {
       const api: LogViewerAPI = {
         appendLog: (log: string) => {
-          lineCountRef.current++;
-          const shouldScroll = autoScrollRef.current && isNearBottom();
-          setContent((prev) => {
-            const newContent = prev ? `${prev}\n${log}` : log;
-            // 只有在底部时才自动滚动
-            if (shouldScroll) {
-              setTimeout(() => {
-                const lineCount = editorRef.current?.getModel()?.getLineCount() || 0;
-                editorRef.current?.revealLine(lineCount);
-              }, 0);
-            }
-            return newContent;
-          });
+          queueLog(log);
         },
         appendLogs: (logs: string[]) => {
-          lineCountRef.current += logs.length;
-          const shouldScroll = autoScrollRef.current && isNearBottom();
-          setContent((prev) => {
-            const newContent = prev ? `${prev}\n${logs.join('\n')}` : logs.join('\n');
-            // 只有在底部时才自动滚动
-            if (shouldScroll) {
-              setTimeout(() => {
-                const lineCount = editorRef.current?.getModel()?.getLineCount() || 0;
-                editorRef.current?.revealLine(lineCount);
-              }, 0);
-            }
-            return newContent;
-          });
-        },
-        clear: () => {
-          setContent('');
-          lineCountRef.current = 0;
-        },
-        scrollToBottom: () => {
-          const lineCount = editorRef.current?.getModel()?.getLineCount() || 0;
-          editorRef.current?.revealLine(lineCount);
+          logs.forEach(log => queueLog(log));
         },
+        clear: clearLogs,
+        scrollToBottom,
         search: (text: string) => {
           if (editorRef.current) {
             editorRef.current.trigger('', 'actions.find', { searchString: text });
@@ -132,14 +232,14 @@ export const MonacoLogViewer: React.FC<MonacoLogViewerProps> = ({
       };
       onReady(api);
     }
-  };
+  }, [wordWrap, onReady, queueLog, clearLogs, scrollToBottom]);
 
   return (
     <div className={`w-full h-full relative ${className}`} style={{ height, ...style }}>
       <Editor
         height="100%"
         defaultLanguage="plaintext"
-        value={content}
+        defaultValue=""
         theme={theme}
         options={{
           fontSize,
@@ -155,11 +255,17 @@ export const MonacoLogViewer: React.FC<MonacoLogViewerProps> = ({
           lineNumbersMinChars: 6,
           renderLineHighlight: 'none',
           automaticLayout: true,
+          renderWhitespace: 'none',
+          renderControlCharacters: false,
+          guides: { indentation: false },
+          occurrencesHighlight: 'off',
+          selectionHighlight: false,
           scrollbar: {
             vertical: 'visible',
             horizontal: 'visible',
             verticalScrollbarSize: 10,
             horizontalScrollbarSize: 10,
+            useShadows: false,
           },
         }}
         onMount={handleEditorDidMount}
diff --git a/frontend/src/components/LogViewer/types.ts b/frontend/src/components/LogViewer/types.ts
index 6effcf00..d1cd5cff 100644
--- a/frontend/src/components/LogViewer/types.ts
+++ b/frontend/src/components/LogViewer/types.ts
@@ -162,6 +162,9 @@ export interface MonacoLogViewerProps {
   /** 自动换行 */
   wordWrap?: boolean;
   
+  /** 最大行数限制（超过后自动删除旧日志，默认10000） */
+  maxLines?: number;
+  
   /** 就绪回调 */
   onReady?: (api: LogViewerAPI) => void;