- Run `SHOW VARIABLES LIKE 'openfileslimit';` in MySQL to see the limit.
- Run `SHOW GLOBAL STATUS LIKE 'Open_files';` in MySQL.
- If you have access and permissions, attempt to increase the limit for the running MySQL instance:
- Set in MySQL: `SET GLOBAL openfileslimit=limit>;` (replace `limit>` with the desired value).
- Run `SHOW PROCESSLIST;` to see active connections and consider closing unused ones.
- For Linux, run `ulimit -n` to see the maximum number of open file descriptors.
- Increase temporarily with `ulimit -n limit>` for the session, or permanently by editing `/etc/security/limits.conf` (for the specific user, add lines like `mysql soft nofile limit>` and `mysql hard nofile `).
- Use the command `sudo systemctl restart mysql` on Linux systems. Ensure that this action won’t cause unacceptable downtime for your applications.
- First, see the current value: `SHOW VARIABLES LIKE 'tableopencache';`.
- Adjust if necessary: `SET GLOBAL tableopencache=;`.
Each action should be considered and performed based on the user's environment and with awareness of any potential impact on the system or service.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)