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What is general query log in MySQL?

What is general query log in MySQL?

The general query log is a general record of what mysqld is doing. The server writes information to this log when clients connect or disconnect, and it logs each SQL statement received from clients.

How do I find MySQL query logs?

How to show the queries log in MySQL?

  1. Enable Query logging on the database. SET global general_log = 1; SET global log_output = ‘table’;
  2. Now you can view the log by running this query: SELECT * FROM mysql. general_log;
  3. If you want to disable query logging on the database, run this query: SET global general_log = 0;

What is general log?

The general query log is a log of every SQL query received from a client, as well as each client connect and disconnect. Since it’s a record of every query received by the server, it can grow large quite quickly.

How do I enable MySQL logging?

To enable the log files, do the following:

  1. Create the /etc/my.cnf options file with the following definitions that enable the log files automatically: [mysqld] log-bin log log-error log-slow-queries.
  2. Stop and start the MySQL server to activate the changes to the /etc/my.

What is the purpose of log query?

The log for each query identifies the SQL statement that was executed, whether or not the query was optimized, and how long (in milliseconds) the query took to execute, as well as other informative data, such as which user account executed the query.

What is general log in RDS?

General log can log every single query on your database in mysql. general_log table. Alternatively you can also log all the queries to a log file, but in RDS instance, logging them to a table was the best option in our situation. More information about general log can be obtained from MySQL documentation.

How do I log a SQL query?

Procedure

  1. From the workbench menu bar, click Window > Preferences > Database Retrieval Parameters > DB Retrieval Debug.
  2. To start logging SQL queries, click Yes.
  3. To stop logging SQL queries, click No.
  4. To view details of the SQL queries in the DB Retrieval Debug view, click Open Debug View, then click OK.

How do I log a query in SQL server?

4 Answers

  1. Queries are saved in the cache via system representations (sys.dm_exec_query_stats, sys.dm_exec_sql_text, and sys.dm_exec_query_plan)
  2. Using SQL Server Profiler.
  3. Using Extended Events.
  4. Using the Query Store, starting from the 2016 version.
  5. Using SQL Complete (SQL Complete\Execution History) in SSMS.

How do I check my general log on RDS?

You can monitor the MySQL error log, the slow query log, and the general log directly through the Amazon RDS console, Amazon RDS API, Amazon RDS AWS Command Line Interface (AWS CLI), or AWS SDKs. The MySQL error log file is generated by default. You can generate the slow query log and the general log.

How do I view the RDS logs?

Open the Amazon RDS console at https://console.aws.amazon.com/rds/ .

  1. In the navigation pane, choose Databases.
  2. Choose the name of the DB instance that has the log file that you want to view.
  3. Choose the Logs & events tab.
  4. Scroll down to the Logs section.
  5. (Optional) Enter a search term to filter your results.

How can I see SQL query history?

How to Check SQL Server Query History

  1. Queries are saved in the cache via system representations (sys. dm_exec_query_stats, sys. dm_exec_sql_text, and sys.
  2. Using SQL Server Profiler.
  3. Using Extended Events.
  4. Using the Query Store, starting from the 2016 version.
  5. Using SQL Complete (SQL Complete\Execution History) in SSMS.

Are SQL queries logged?

By default, SQL Server activity is not logged the way you expect. Some write activity is recorded in the Transaction Log, but this also depends on how your databases are set up.

Should I log SQL queries?

You should not log all queries in production unless you are having problems and it’s part of a troubleshooting process. You can and should log slow queries so you can see what may be slowing down your production site.

What is MySQL slow query log?

The slow query log consists of SQL statements that take more than long_query_time seconds to execute and require at least min_examined_row_limit rows to be examined. The slow query log can be used to find queries that take a long time to execute and are therefore candidates for optimization.

What is General log in RDS?

How do I find the slow query log in MySQL RDS?

Activate MySQL slow query log At first, go to AWS RDS dashboard, and go to “Parameter Groups”. You can set the “slow_query_log” to “1” and save it. Set “long_query_time” as you want. The queries slower than this value will be recorded to the slow query log.

What is query history?

The query history shows SQL queries performed using SQL warehouses. You can use the information available through this screen to help you debug issues with queries. This section describes how to work with query history using the UI. To work with query history using the API, see Query History API 2.0.

Does slow query log affect performance?

It is safe to log slow queries with execution time bigger than a second without worry about performance impact in case of CPU-bound workload. The performance impact is negligibly small in IO-bound workload even if all queries are logged.

  • September 30, 2022

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