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@@ -249,11 +249,13 @@
 - Performance Tuning
   - Tuning Guide
     - [Performance Tuning Overview](/performance-tuning-overview.md)
-    - [Performance Analysis and Tuning](/performance-tuning-methods.md)
-    - [Performance Tuning Practices for OLTP Scenarios](/performance-tuning-practices.md)
-    - [TiFlash Performance Analysis Methods](/tiflash-performance-tuning-methods.md)
-    - [TiCDC Performance Analysis Methods](/ticdc-performance-tuning-methods.md)
-    - [Latency Breakdown](/latency-breakdown.md)
+    - [A Practical Guide for SQL Tuning](/sql-tuning-best-practice.md)
+    - Tuning by Metrics
+      - [Performance Analysis and Tuning](/performance-tuning-methods.md)
+      - [Performance Tuning Practices for OLTP Scenarios](/performance-tuning-practices.md)
+      - [TiFlash Performance Analysis Methods](/tiflash-performance-tuning-methods.md)
+      - [TiCDC Performance Analysis Methods](/ticdc-performance-tuning-methods.md)
+      - [Latency Breakdown](/latency-breakdown.md)
     - [TiDB Best Practices on Public Cloud](/best-practices-on-public-cloud.md)
   - Configuration Tuning
     - [Tune Operating System Performance](/tune-operating-system.md)