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How do I enable slow queries in MySQL?
To enable the slow query log, type the following command at the mysql> prompt: SET GLOBAL slow_query_log = ‘ON’; There are additional options that you can set for the slow query log: By default, when the slow query log is enabled, it logs any query that takes longer than 10 seconds to run.
How do I disable general log in MySQL?
To disable or enable the general query log or change the log file name at runtime, use the global general_log and general_log_file system variables. Set general_log to 0 (or OFF ) to disable the log or to 1 (or ON ) to enable it.
Why do I need to enable slow query log in MySQL?
Enabling the slow query log. Slow queries can affect database performance and overall server performance. The slow query log feature in MySQL enables you to log queries that exceed a predefined time limit. This greatly simplifies the task of finding inefficient or time-consuming queries.
What is the name of the slow query log file?
By default the slow query log file name is host_name-slow.log. The server creates the file in the data directory unless an absolute path name is given to specify a different directory. The log file path can be changed, say we have to change it to ‘/var/log/mysql/slow_query.log’. We run the following command:
When to use slow query log in azure monitor?
This parameter takes effect when log_queries_not_using_indexes is set to ON. log_output: if “File”, allows the slow query log to be written to both the local server storage and to Azure Monitor Diagnostic Logs.
What is the benchmark for a slow query in MySQL?
MySQL allows you to define the benchmark for considering a query as slow. By default, the value of system variable ‘long_query_time’ is 10. It means that any query which takes more than 10 seconds to execute will be considered as slow. Lets change the benchmark to 20 seconds as shown below: