How does the general query log work in MySQL?

How does the general query log work in MySQL?

If a log file already is open, it is closed and the new file is opened. When the general query log is enabled, the server writes output to any destinations specified by the log_output system variable. If you enable the log, the server opens the log file and writes startup messages to it.

How to enable query log in MySQL 5.1.29?

To enable the query log, put this in /etc/my.cnf in the [mysqld] section With mysql 5.1.29+ , the log option is deprecated. To specify the logfile and enable logging, use this in my.cnf in the [mysqld] section:

How to view Cloud SQL for MySQL logs?

To view logs for your Cloud SQL instance log entries: Select an existing Cloud SQL project at the top of the page. Resource: select Cloud SQL Database. In the dialog, select a Cloud SQL instance. Log names: scroll to the Cloud SQL section and select appropriate log files for your instance.

How to specify the general query log destination?

To specify a log file name, use –general_log_file= file_name . To specify the log destination, use the log_output system variable (as described in Section 5.4.1, “Selecting General Query Log and Slow Query Log Output Destinations” ). If you specify the TABLE log destination, see Log Tables and “Too many open files” Errors .

When the general query log is enabled, the server writes output to any destinations specified by the log_output system variable. If you enable the log, the server opens the log file and writes startup messages to it. However, further logging of queries to the file does not occur unless the FILE log destination is selected.

Can you alter the log table in MySQL?

The log tables can be altered to use the MyISAM storage engine. You cannot use ALTER TABLE to alter a log table that is in use. The log must be disabled first. No engines other than CSV or MyISAM are legal for the log tables. To disable logging so that you can alter (or drop) a log table, you can use the following strategy.

Is there a variable to enable log output?

File output, table output, or both can be selected. The log_output system variable specifies the destination for log output. Setting this variable does not in itself enable the logs; they must be enabled separately.

How to change the name of the general query log file?

The general_log_file and slow_query_log_file variables indicate the names of the general query log and slow query log files. You can set these variables at server startup or at runtime to change the names of the log files. To disable or enable general query logging for the current session, set the session sql_log_off variable to ON or OFF.

When the general query log is enabled, the server writes output to any destinations specified by the log_output system variable. If you enable the log, the server opens the log file and writes startup messages to it. However, further logging of queries to the file does not occur unless the FILE log destination is selected.

What is the log _ timestamps system variable in MySQL?

The log_timestamps system variable controls the time zone of timestamps in messages written to the general query log file (as well as to the slow query log file and the error log).

How to disable the general query in MySQL?

Set general_log to 0 (or OFF) to disable the log or to 1 (or ON) to enable it. Set general_log_file to specify the name of the log file. If a log file already is open, it is closed and the new file is opened.

How to specify the log destination in MySQL?

To specify the log destination, use the log_output system variable (as described in Section 5.4.1, “Selecting General Query Log and Slow Query Log Output Destinations” ). If you specify the TABLE log destination, see Log Tables and “Too many open files” Errors .

How are the logs accessible in MySQL server?

Logs are accessible remotely through any client that can connect to the server and issue queries (if the client has the appropriate log table privileges). It is not necessary to log in to the server host and directly access the file system. The log table implementation has the following characteristics:

Which is the default pipe name for MySQL?

In both cases, the client process must know the address or a pipe name to which it should send the request. The default pipe name for the MySQL server is \\\\.\\pipe\\MySQL. Step 1. Enable named pipes for the MySQL server

Do you need to enable the log in MySQL?

If you enable the log, the server opens the log file and writes startup messages to it. However, further logging of queries to the file does not occur unless the FILE log destination is selected.

Which is the default name for the general query log file?

If you specify no name for the general query log file, the default name is host_name .log. The server creates the file in the data directory unless an absolute path name is given to specify a different directory.

How to disable or enable the general query log?

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. Set general_log_file to specify the name of the log file.

How to enable slow query log in MySQL?

In there you can enable the slow query log and general log, see a live monitor, select a portion of the graph, see the related queries and analyse them. I had to drop and recreate the general log at one point. During the recreation, character sets got messed up and I ended up having this error in the logs:

How to enable or disable query log in MySQL?

If either log is enabled, the server opens the corresponding log file and writes startup messages to it. However, further logging of queries to the file does not occur unless the FILE log destination is selected.