discussion Guide Fixing “2006 MySQL Server Has Gone Away” Error & Increasing max_allowed_packet (2025 Guide)

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Fixing “2006 MySQL Server Has Gone Away” Error & Increasing max_allowed_packet​

When working with MySQL, the “2006 MySQL server has gone away” error is one of the most common issues.
It typically occurs during large data queries or long-running operations.
The most frequent cause of this error is an insufficient max_allowed_packet value.

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🔍 What Is max_allowed_packet?​

The max_allowed_packet variable defines the maximum data packet size that MySQL can handle in a single session.
If the data being sent exceeds this limit, MySQL terminates the connection and triggers this error.

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🛠️ Solution: Increase the max_allowed_packet Value​

The fix is straightforward. Follow these steps to increase the packet size limit.

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Edit the MySQL Configuration File (my.cnf or my.ini)​

On most servers, the configuration file is located in one of the following paths:

• nano /etc/my.cnf
• nano /etc/mysql/my.cnf
• C:\ProgramData\MySQL\MySQL Server X.X\my.ini (Windows)

Under the [mysqld] section, add or update the following lines:

[mysqld]
wait_timeout = 31536000
max_allowed_packet=1024M

Note: You can use 64M, 128M, or 256M depending on your data size requirements.

Restart the MySQL Service​

service mysqld restart

If you’re using Plesk or cPanel, you can restart the MySQL service directly from your control panel interface.

 

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If a problem occurs, you can open a ticket.