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Description

This error indicates that a specific MariaDB user has exceeded one of their allocated server resource limits. These limits can include the number of queries, updates, connections, or concurrent connections allowed within a defined period, preventing further operations.

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Error Message

User '%s' has exceeded the '%s' resource (current value: %ld)

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Known Causes

4 known causes

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Exceeded Query Limit

The user has performed more queries than allowed within the specified hourly limit.

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Too Many Updates

The user has executed an excessive number of update operations within the hourly limit.

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Concurrent Connection Limit

The user has opened more simultaneous connections than permitted by their assigned limit.

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Hourly Connection Limit

The user has established too many new connections within an hour, exceeding their connection limit.

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Solutions

3 solutions available

1. Temporarily Increase Resource Limit easy

Quickly resolve the issue by temporarily increasing the user's resource limit.

1

Identify the user and the specific resource that has been exceeded. The error message will provide this information (e.g., '%s' and '%s').

2

Connect to your MariaDB server as a user with sufficient privileges (e.g., root).

mysql -u root -p

3

Use the `SET RESOURCE` command to temporarily increase the limit for the affected user. Replace 'your_user', 'resource_name', and 'new_limit' with the actual values from the error message and your desired new limit. For example, to increase max_user_connections for 'app_user' to 200:

SET RESOURCE 'your_user' 'resource_name' = new_limit;

4

Re-run the operation that was failing. This solution is temporary and will reset upon server restart. Consider a permanent solution for long-term stability.

2. Permanently Adjust User Resource Limits medium

Modify the user's resource limits permanently in the MariaDB configuration.

1

Identify the user and the specific resource that has been exceeded. The error message will provide this information.

2

Connect to your MariaDB server as a user with sufficient privileges (e.g., root).

mysql -u root -p

3

Use the `ALTER USER` statement to permanently set the desired resource limit. Replace 'your_user', 'resource_name', and 'new_limit' with the actual values. For example, to set max_user_connections for 'app_user' to 200 permanently:

ALTER USER 'your_user'@'localhost' WITH MAX_USER_CONNECTIONS 200;

4

If you need to adjust other resource limits (e.g., max_questions, max_updates), consult the MariaDB documentation for the correct syntax for `ALTER USER` and the specific resource names.

5

Verify the new limits by querying the `mysql.user` table:

SELECT user, host, max_user_connections FROM mysql.user WHERE user = 'your_user';

3. Analyze and Optimize Application Resource Usage advanced

Investigate the application's behavior to understand why it's hitting resource limits.

1

Examine application logs for patterns of excessive database activity, such as frequent connections, long-running queries, or inefficient data retrieval.

2

Use MariaDB's performance monitoring tools like `SHOW PROCESSLIST` or `SHOW GLOBAL STATUS` to identify bottlenecks and high resource consumers.

SHOW PROCESSLIST;
SHOW GLOBAL STATUS LIKE 'Threads_connected';
SHOW GLOBAL STATUS LIKE 'Max_used_connections';

3

Optimize SQL queries by adding indexes, rewriting inefficient queries, or reducing the scope of data retrieved. Tools like `EXPLAIN` can help identify slow queries.

EXPLAIN SELECT * FROM your_table WHERE condition;

4

Implement connection pooling in your application to reuse database connections and reduce the overhead of establishing new ones. This is particularly effective for reducing `max_user_connections` limits.

5

Consider implementing rate limiting or throttling mechanisms within the application to control the frequency of database requests.

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Related Errors

5 related errors

MariaDB Error 1226: User Resource Limit Reached