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When encountering the "Maximum execution time exceeded" error, the following 5 methods should be solved: 1. Modify the max_execution_time, memory_limit and other parameters in php.ini when you have server permissions and restart the service; 2. Set the php_value adjustment limit through .htaccess when using Apache and allowing override; 3. It is recommended to add $cfg['ExecTimeLimit'] = 300 in config.inc.php of phpMyAdmin to safely extend the execution time; 4. When you cannot modify the configuration, you can batch process large SQL files or import them using the command line mysql tool; 5. Optimize operations that cause timeouts, such as adding indexes to query, paging processing or batch insertion of data; the recommended priority is to try to configure the execution time of phpMyAdmin first, then consider command line import, adjust php.ini if you have permission, and finally use batch operations. This problem can be effectively solved by matching the environment.

When you encounter a "Maximum execution time exceeded" error when using phpMyAdmin, it means that the PHP script execution time has exceeded the upper limit set by the server (the default is usually 30 seconds). This is common when importing large databases, performing complex queries, or exporting large amounts of data.

Here are a few practical solutions:

? 1. Modify php.ini file (the most fundamental solution)

If you have server permissions, you can directly modify the PHP configuration file:

1. Find your php.ini file (the location can be viewed through phpinfo() ).
2. Modify the following parameters:

 max_execution_time = 300 ; Change to 300 seconds (5 minutes), or 0 means unlimited memory_limit = 512M ; It is recommended to increase the memory appropriately upload_max_filesize = 256M ; If it is an import file, you should also increase post_max_size = 256M ; Ensure that the POST data size is sufficient

3. Save and restart a web service (such as Apache or Nginx):

 sudo service apache2 restart
# or sudo systemctl restart nginx

?? Note: Set to 0 (unlimited) has a security risk and is only recommended for use in controlled environments.

? 2. Modify via .htaccess (applicable to Apache and allows overriding configuration)

If you do not have permission to change php.ini , but use Apache, you can edit the .htaccess file in the phpMyAdmin directory:

 php_value max_execution_time 300
php_value memory_limit 512M

?Apache requires AllowOverride to be enabled, otherwise an error of 500 will be reported.

? 3. Temporarily increase execution time in phpMyAdmin configuration (recommended)

Edit the configuration file config.inc.php of phpMyAdmin and add it at the end of the file:

 $cfg['ExecTimeLimit'] = 300; // Unit: seconds

This overrides the max_execution_time limit of PHP (provided that PHP run mode allows).

? This setting is only effective for phpMyAdmin, which is safer.

? 4. Import or export data in batches (suitable for large files)

If the configuration cannot be modified, it is recommended:

• Split the SQL file into small pieces (such as one file per 50MB) and split it with a text editor or tool (such as the split command).
• Import using the command line (more stable):

 mysql -u username -p database_name < dump.sql

The command line is not affected by php.ini restrictions by default, and is suitable for handling large databases.

? 5. Check if a specific operation caused the timeout

• Complex SELECT query? Try adding an index or a pagination query ( LIMIT ).
• Changes in large table structure? Consider operating during low peak periods.
• Insert a lot of data? Use batch insert statements to avoid single execution.

Summary: Recommended operation sequence

• ? Priority try to modify $cfg['ExecTimeLimit'] in config.inc.php of phpMyAdmin
• ? If you are importing files, use the command line mysql tool instead
• ? Have server permissions? Change php.ini and restart the service
• ? Can't change the configuration? Split SQL files and operate in batches

Basically these methods. The key is to choose the most appropriate method based on your server environment. Not complicated, but configuration priority is easily ignored.

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