mysql8 max_allowed_packet 最大设置

In MySQL 8.0, the maximum value of `max_allowed_packet` is 1073741824 bytes, which is 1 GB. This maximum value is the same for Linux, macOS, and Windows operating systems.

To change the value of `max_allowed_packet` in MySQL 8.0, you can edit the MySQL configuration file (my.cnf or my.ini) and add or modify the following line:

max_allowed_packet=1G

This sets the value of `max_allowed_packet` to 1 GB. You can change the value to any size you need, as long as it is within the maximum limit of 1 GB.

After making changes to the configuration file, you need to restart the MySQL server for the changes to take effect.

Note that setting `max_allowed_packet` too high can cause memory issues on the server, so it is recommended to set it to the minimum size necessary for your application to function properly.