Does MySQL Connection Closure Improve PHP Script Performance?

Does Connection Closure Impact MySQL Performance?

Question:

Is it essential to manually close MySQL connections for efficiency? Or do they automatically expire after PHP script execution?

Answer:

According to MySQL documentation:

"The link to the server will be closed as soon as the execution of the script ends, unless it's closed earlier by explicitly calling mysql_close()."

If your script delays processing after result retrieval, consider closing the connection to prevent the MySQL server from encountering connection limits during heavy server usage. However, if the connection remains open until the script's end, explicit closure is unnecessary.

The integration of FastCGI with PHP may impact behavior. Some sources indicate that FastCGI-enabled PHP builds establish persistent connections even for mysql_connect calls. However, documentation suggests that connections close upon process rather than script termination. To ensure consistency, it's recommended to use mysql_close() or, ideally, PDO (if available).

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