Mysql Error Log Variable
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Connectors More MySQL.com Downloads Developer Zone Section Menu: Documentation Home MySQL 5.7 Reference Manual Preface and Legal Notices General Information Installing and Upgrading MySQL Using MySQL as a Document mysql error log location Store Tutorial MySQL Programs MySQL Server Administration The MySQL Server Configuring the mysql error log location windows Server Server Configuration Defaults Server Option and Variable Reference Server Command Options Server System Variables Using System Variables mysql set global variable Structured System Variables Dynamic System Variables Server Status Variables Server SQL Modes IPv6 Support Verifying System Support for IPv6 Configuring the MySQL Server to Permit IPv6 Connections Connecting Using the mysql wait_timeout IPv6 Local Host Address Connecting Using IPv6 Nonlocal Host Addresses Obtaining an IPv6 Address from a Broker Server-Side Help Server Response to Signals The Server Shutdown Process The MySQL Data Directory The mysql System Database MySQL Server Logs Selecting General Query and Slow Query Log Output Destinations The Error Log The General Query Log The Binary Log Binary Logging Formats
Mysql Interactive_timeout
Setting The Binary Log Format Mixed Binary Logging Format Logging Format for Changes to mysql Database Tables The Slow Query Log The DDL Log Server Log Maintenance MySQL Server Plugins Server Plugins Available Installing and Uninstalling Plugins Obtaining Server Plugin Information MySQL Enterprise Thread Pool Thread Pool Components Thread Pool Installation Thread Pool Operation Thread Pool Tuning The Rewriter Query Rewrite Plugin Installing or uninstalling the Rewriter Query Rewrite Plugin Using the Rewriter Query Rewrite Plugin Rewriter Query Rewrite Plugin Reference Version Tokens Version Tokens Components Installing or Uninstalling Version Tokens Using Version Tokens Version Tokens Reference Running Multiple MySQL Instances on One Machine Setting Up Multiple Data Directories Running Multiple MySQL Instances on Windows Starting Multiple MySQL Instances at the Windows Command Line Starting Multiple MySQL Instances as Windows Services Running Multiple MySQL Instances on Unix Using Client Programs in a Multiple-Server Environment Tracing mysqld Using DTrace mysqld DTrace Probe Reference Connection Probes Command Probes Query Probes Query Parsing Probes Query Cache Probes Query Execution Probes Row-Level Probes Read Row Probes Index Probes Lock Probes Filesort Probes Stat
Connectors More MySQL.com Downloads Developer Zone Section Menu: Documentation Home MySQL 5.5 Reference Manual Preface and Legal Notices General Information Installing and Upgrading
Mysql Connect Timeout
MySQL Tutorial MySQL Programs MySQL Server Administration The MySQL Server Configuring mysql set wait_timeout the Server Server Configuration Defaults Server Option and Variable Reference Server Command Options Server System Variables mysql log file location windows Using System Variables Structured System Variables Dynamic System Variables Server Status Variables Server SQL Modes IPv6 Support Verifying System Support for IPv6 Configuring the MySQL Server to http://dev.mysql.com/doc/mysql/en/error-log.html Permit IPv6 Connections Connecting Using the IPv6 Local Host Address Connecting Using IPv6 Nonlocal Host Addresses Obtaining an IPv6 Address from a Broker Server-Side Help Server Response to Signals The Server Shutdown Process The MySQL Data Directory The mysql System Database MySQL Server Logs Selecting General Query and Slow Query Log Output Destinations The https://dev.mysql.com/doc/refman/5.5/en/error-log.html Error Log The General Query Log The Binary Log Binary Logging Formats Setting The Binary Log Format Mixed Binary Logging Format Logging Format for Changes to mysql Database Tables The Slow Query Log The DDL Log Server Log Maintenance MySQL Server Plugins Server Plugins Available Installing and Uninstalling Plugins Obtaining Server Plugin Information MySQL Enterprise Thread Pool Thread Pool Components Thread Pool Installation Thread Pool Operation Thread Pool Tuning Running Multiple MySQL Instances on One Machine Setting Up Multiple Data Directories Running Multiple MySQL Instances on Windows Starting Multiple MySQL Instances at the Windows Command Line Starting Multiple MySQL Instances as Windows Services Running Multiple MySQL Instances on Unix Using Client Programs in a Multiple-Server Environment Tracing mysqld Using DTrace mysqld DTrace Probe Reference Connection Probes Command Probes Query Probes Query Parsing Probes Query Cache Probes Query Execution Probes Row-Level Probes Read Row Probes Index Probes Lock Probes Filesort Probes Statement Probes Network Probes Keycache Probes Security Backup and Recovery Optimizati
2013 177,038 mysql mariadb log performance databases memcached sysadmin Debian how-to Share: Tweet Image source: Blue and http://www.pontikis.net/blog/how-and-when-to-enable-mysql-logs pink dolphins at work If you are a web developer, you need http://stackoverflow.com/questions/9871718/how-can-i-start-and-check-my-mysql-log to refer to various log files, in order to debug your application or improve its performance. Logs is the best place to start troubleshooting. Concerning the famous MySQL database server (or MariaDB server), you need to refer to the following log files: The Error Log. It contains mysql error information about errors that occur while the server is running (also server start and stop) The General Query Log. This is a general record of what mysqld is doing (connect, disconnect, queries) The Slow Query Log. Ιt consists of "slow" SQL statements (as indicated by its name). This article does not refer to The Binary Log. This requires very high mysql error log standards server hardware and is useful only in special cases (e.g. replication, master - slaves setup, certain data recovery operations). Οtherwise, it is just a "performance killer". The official documentation about MySQL logs is available here. Enable logs from MySQL configuration Logging parameters are located under [mysqld] section. Edit MySQL configuration file: nano /etc/mysql/my.cnf This is the default setup for Logging and Replication (in Debian server). In other distributions the structure may be different, but you can always use MySQL server parameters: # * Logging and Replication # # Both location gets rotated by the cronjob. # Be aware that this log type is a performance killer. # As of 5.1 you can enable the log at runtime! #general_log_file = /var/log/mysql/mysql.log #general_log = 1 # # Error logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf. # # Here you can see queries with especially long duration #log_slow_queries = /var/log/mysql/mysql-slow.log #long_query_time = 2 #log-queries-not-using-indexes # # The following can be used as easy to replay backup logs or for replication. # note: if you are setting up a replication
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How can I start and check my MySQL log? up vote 17 down vote favorite 5 I want to check the log in MySQL to see the queries that are being run by my application. How can I do this? I am using XAMPP and the directory to MySQL is C:\xampp\mysql. This is what I get when I do show variables like '%log%'; mysql> show variables like '%log%'; +---------------------------------+------------------------------------+ | Variable_name | Value | +---------------------------------+------------------------------------+ | back_log | 50 | | binlog_cache_size | 32768 | | binlog_format | STATEMENT | | expire_logs_days | 0 | | general_log | OFF | | general_log_file | C:/xampp/mysql/data/mysql.log | | innodb_flush_log_at_trx_commit | 1 | | innodb_locks_unsafe_for_binlog | OFF | | innodb_log_buffer_size | 8388608 | | innodb_log_file_size | 5242880 | | innodb_log_files_in_group | 2 | | innodb_log_group_home_dir | C:\xampp\mysql\data\ | | innodb_mirrored_log_groups | 1 | | log | OFF | | log_bin | OFF | | log_bin_trust_function_creators | OFF | | log_bin_trust_routine_creators | OFF | | log_error | C:\xampp\mysql\data\mysql.err | | log_output | FILE | | log_queries_not_using_indexes | OFF | | log_slave_updates | OFF | | log_slow_queries | OFF | | log_warnings | 1 | | max_binlog_cache_size | 4294963200 | | max_binlog_size | 1073741824 | | max_relay_log_size | 0 | | relay_log | | | relay_log_index | | | relay_log_info_file | relay-log.info | | relay_log_purge | ON | | relay_log_space_limit | 0 | | slow_query_log | OFF | | slow_query_log_file | C:/xampp/mysql/data/mysql-slow.log | | sql_log_bin | ON | | sql_log_off | OFF | | sql_log_update | ON | | sync_binlog | 0 | +---------------------------------+------------------------------------+ 37 rows in set (0.00 sec) mysql logging share|improve this question edited Jun 25 '13 at 18:59 Elias Zamaria 26.1k2274118 asked Mar 26 '12 at 1