In summary, the general process to find and tune a slow MySQL query follows this process: Findthe slow MySQL query (either manually or with a tool like PMM) Check the EXPLAIN plan of the query Review the table
Set long_query_time = 0 (in some cases, you may need to rate limit to not flood the log) Enable the slow log and collect for some time (slow_query_log = 1) Stop collection and process the log with pt-query-digest Begin reviewing the top queries in times of resource usage Note –...
With MySQL, it’s possible to log the slow queries by changing the status of the slow query feature. By default, the status is disabled. But this post explained the steps that you must follow to enable it and set the ground to log the slow queries in MySQL....
It is useful when I want to investigate a problem and its root causes. Some of the examples are listed below (but not limited to) : 1. Which IO operation is causing MySQL to slow down? 2. Which file a process/thread is mostly waiting for? 3. At which execution stage is a query ...
log-slow-queries=/var/log/mysql/log-slow-queries.log # Default to using old password format for compatibility with mysql 3.x # clients (those using the mysqlclient10 compatibility package). old_passwords=1 [mysql.server] user=mysql
Check CPU, memory, and disk I/O during query execution. Slow queries could indicate hardware limitations or improper resource allocation. 4. Check for Locks and Deadlocks Use tools or database commands to identify if your query is waiting on locks held by other transactions. ...
Also, check out our unbeatable pricing for the best plan that fits your needs. FAQs 1. How do you migrate a MySQL database? Migrate a MySQL database by exporting the database using the mysqldump command, transferring the dump file to the new server, and importing it using the mysql ...
Sometimes, the error can be caused by a misconfiguration of the website’s application. The reasons can be conflicts between PHP scripts, an incorrect PHP version for the website, timeouts from CGI scripts, slow MySQL queries, etc. Change the PHP version of the website ...
Slow query log: Record of each query, which execution took too much time. This log could be useful for the optimisation of slow SQL queries. In this tutorial, you will do the following actions: You will install the MySQL server and view default error log. You will connect to MySQL server...
I made quite a complex View on my MySQL database, and I realized that some queries are slow. My first idea was to add indexes but it's not possible to do on a view so I'm lost on how to improve the performance of my query. ...