為什麼即使增加 max_user_connections 後 MySQL 錯誤 1040 仍然存在？

How to Resolve MySQL Error 1040: Too Many Connections

Error 1040 occurs when MySQL reaches its maximum limit of simultaneous connections. Despite increasing the max_user_connection parameter, the error persists. This issue can stem from various factors, including:

Causes of MySQL Error 1040

• Slow queries blocking connections
• Data storage techniques consuming resources
• Incorrect MySQL configuration

Solving MySQL Error 1040

1. Check Maximum Connections Limit:

   Using the following command, verify the current maximum connection limit:

   show variables like "max_connections";

   If the value is low, increase it using the following command without restarting MySQL:

   set global max_connections = 200;

2. Restart MySQL:

   Restart MySQL to apply the new connection limit.

3. Optimize Queries and Data Storage:

   Optimize slow queries to free up connections. Consider using indexing, caching, and appropriate data structures to reduce resource consumption.

Caution:

Increasing the maximum connection limit can strain MySQL's RAM resources. Monitor RAM usage and make adjustments as necessary.

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