How can one effectively troubleshoot and debug PHP scripts that are causing high server load on a server?

To effectively troubleshoot and debug PHP scripts causing high server load, one should start by identifying the specific script or scripts that are consuming the most resources. This can be done by monitoring server performance metrics, using profiling tools, and analyzing error logs. Once the problematic scripts are identified, optimizations can be made such as optimizing database queries, reducing unnecessary function calls, implementing caching mechanisms, and ensuring proper resource management. 

// Example of optimizing database query by using indexes
// Before optimization
$query = "SELECT * FROM users WHERE status = 'active'";
$result = mysqli_query($connection, $query);

// After optimization
$query = "SELECT * FROM users WHERE status = 'active' AND indexed_column = 'value'";
$result = mysqli_query($connection, $query);

Keywords

profiling performance monitoring Xdebug memory leaks query optimization

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