[docs add]Redis 内存碎片

Author: Snailclimb

README.md

@@ -177,6 +177,7 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 
 1. [Redis 常见问题总结](docs/database/redis/redis-questions-01.md)
 2. [3种常用的缓存读写策略](docs/database/redis/3-commonly-used-cache-read-and-write-strategies.md)
+2. [Redis 内存碎片](./docs/database/redis/redis-memory-fragmentation.md)
 
 ## 搜索引擎
 

docs/.vuepress/sidebar.ts

@@ -278,7 +278,15 @@ export const sidebarConfig = defineSidebarConfig({
           collapsable: true,
           children: [
             "redis-questions-01",
-            "3-commonly-used-cache-read-and-write-strategies",
+            {
+              text: "重要知识点",
+              icon: "important",
+              collapsable: true,
+              children: [
+                "3-commonly-used-cache-read-and-write-strategies",
+                "redis-memory-fragmentation",
+              ],
+            },
           ],
         },
       ],