Query Optimization Development Tutorials, Guides & Insights

Modify the response structure to include metadata and links:

   use Illuminate\Http\Request;

   public function index(Request $request)
   {
       $posts = Post::paginate(10);

       return response()->json([
           'data' => $posts->items(), // The paginated items
           'meta' => [
               'current_page' => $posts->currentPage(),
               'per_page' => $posts->perPage(),
               'total' => $posts->total(),
               'last_page' => $posts->lastPage(),
           ],
           'links' => [
               'next' => $posts->nextPageUrl(),
               'previous' => $posts->previousPageUrl(),
           ],
       ]);
   }

   composer require barryvdh/laravel-debugbar --dev

Once installed, open your application in the browser. The debug bar will show all executed queries.

To view existing indexes on a table, use the SHOW INDEX command:

SHOW INDEX FROM table_name;

• Query Analyzer: Identifies slow queries and provides recommendations for optimization.
• Replication Monitoring: Monitors replication status and detects issues.
• Disk Monitoring: Tracks disk space usage and alerts on potential problems.

The slow query log records queries that exceed a specified execution time. Analyzing this log can help you identify and optimize slow queries.

-- Subquery
SELECT * FROM users WHERE user_id IN (SELECT user_id FROM orders);

-- Optimized with JOIN
SELECT users.* FROM users
JOIN orders ON users.user_id = orders.user_id;

Regularly review query performance and make adjustments as necessary. Use tools like MySQL Workbench, Percona Toolkit, or performance_schema for ongoing monitoring and optimization.