Mysql Where Is The Error Log
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Mysql Query Error Log
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Mysql Query Logs
the workings and policies of this site About Us Learn more mysql logarithm about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow mysqld log 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 http://dev.mysql.com/doc/mysql/en/error-log.html each other. Join them; it only takes a minute: Sign up How to see log files in MySQL? up vote 70 down vote favorite 30 I've read that Mysql server creates a log file where it keeps a record of all activities - like when and what queries execute. Can anybody tell me where it exists in my http://stackoverflow.com/questions/5441972/how-to-see-log-files-in-mysql system? How can I read it? Basically, I need to back up the database with different input [backup between two dates] so I think I need to use log file here, that's why I want to do it... I think this log must be secured somehow because sensitive information such as usernames and password may be logged [if any query require this]; so may it be secured, not easily able to be seen? I have root access to the system, how can I see the log? When I try to open /var/log/mysql.log it is empty. This is my config file: [client] port = 3306 socket = /var/run/mysqld/mysqld.sock [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] log = /var/log/mysql/mysql.log binlog-do-db=zero user = mysql socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp skip-external-locking bind-address = 127.0.0.1 # # * Fine Tuning # key_buffer = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 general_log_file = /var/log/mysql/mysql.log general_log = 1 mysql logging share|improve this question edited J
2013 177,038 mysql mariadb log performance databases memcached sysadmin Debian how-to Share: Tweet Image source: Blue and pink dolphins at work If you are a web developer, you http://www.pontikis.net/blog/how-and-when-to-enable-mysql-logs need 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 information about errors that occur while the server is running (also server start and stop) The General Query Log. This is a general record error log 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 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 mysql error log 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 slave, see README.Debian about # other settings you may need to change. #server-id = 1 #log_bin = /var/log/mysql/mysql-bin.log expire_logs_days = 10 max_binlog_size = 100M #binlog_do_db = include_database_name #binlog_ignore_db = include_database_name All log files are NOT enabled by default MySQL setup (except the error log on Windows). Default Debian setup sends Error log to syslog. The other log files are not enabled. Error Log Error Log goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.c