Default Error Log Mysql
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Variables Server SQL Modes IPv6 Support Verifying System Support for IPv6 Configuring the MySQL Server to Permit IPv6 Connections Connecting Using the IPv6 Local Host Address Connecting Using IPv6 Nonlocal Host Addresses mysql error log cpanel 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 Setting The Binary Log Format Mixed Binary Logging Format Logging Format for Changes to mysql mysql query error log 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 Statement Probes Network Probes Keycache Probes Security Backup and Recovery Optimization Language Structure Globalization Data Types Functions and Operators SQL Statement Syntax The InnoDB Storage Engine Alternative Storage Engines High Av
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other. Join them; it only takes a minute: Sign up How to see log files in MySQL? up vote 69 down vote favorite 28 I've read that Mysql server creates a log file where it keeps a record http://dev.mysql.com/doc/mysql/en/error-log.html of all activities - like when and what queries execute. Can anybody tell me where it exists in my 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 http://stackoverflow.com/questions/5441972/how-to-see-log-files-in-mysql 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 Jul 6 at 12:04 kenorb 21.4k8151122 asked Mar 26 '11 at 11:21 Arjun 90211025 add a comment| 8 Answers 8 active oldest votes up vote 33 down vote accepted Here is a simple way to enable them. In mysql we need to see often 3 logs which are mostly needed during any project development. 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 of what mysqld is doing (connect, disconnect, queries) The Slow Query Log. Ιt consists of "slow" SQL statements (as indicated by its name). By default no log files are enabled in MYSQL. All err
174,838 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 need to refer http://www.pontikis.net/blog/how-and-when-to-enable-mysql-logs to various log files, in order to debug your application or improve its performance. Logs https://www.psce.com/blog/2012/06/02/how-to-find-mysql-binary-logs-error-logs-temporary-files/ 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 of what mysqld is doing error log (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 here. Enable logs from MySQL configuration Logging parameters mysql error log 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.cnf, which contains the following: [mysqld_safe] syslog This is the recommended method. If, for some reaso
Development with MySQL Hardware Aspects Tips & Tricks Varia You are here: Home / MySQL / Managing MySQL / How to find MySQL binary logs, error logs, temporary files?How to find MySQL binary logs, error logs, temporary files? June 2, 2012 by Maciej Dobrzanski 6 Comments Have you ever spent a lot of time trying to locate where MySQL keeps some file? Here is a quick way to find all this information in one place. The obvious way is through examining database options in my.cnf or looking at the output of SHOW GLOBAL VARIABLES. But not every path may be explicitly set in the configuration, in such case MySQL may assume some default, while other options may be set using relative paths. A different approach is listing all files that a running database instance keeps open and searching for the required information there. I find that method by far the fastest whenever I need to learn any of such details. garfield ~ # lsof -nc mysqld | grep -vE '(.so(..*)?$|.frm|.MY?|.ibd|ib_logfile|ibdata|TCP)' COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME mysqld 30257 mysql cwd DIR 253,1 4096 25346049 /data/mysql mysqld 30257 mysql rtd DIR 253,2 4096 2 / mysqld 30257 mysql txt REG 253,2 10965992 839485 /usr/sbin/mysqld mysqld 30257 mysql 0u CHR 136,8 0t0 11 /dev/pts/8 mysqld 30257 mysql 1w REG 253,4 10229 270851 /var/log/mysql/mysql.err mysqld 30257 mysql 2w REG 253,4 10229 270851 /var/log/mysql/mysql.err mysqld 30257 mysql 3u REG 253,1 2376 10305537 /data/mysql/mysql-bin.index mysqld 30257 mysql 5u REG 253,5 0 81 /tmp/ib8iroKe (deleted) mysqld 30257 mysql 6u REG 253,5 0 82 /tmp/ib8WXRbx (deleted) mysqld 30257 mysql 7u REG 253,5 0 83 /tmp/ibcmlCEP (deleted) mysqld 30257 mysql 8u REG 253,5 0 84 /tmp/ibGzgP9q (deleted) mysqld 30257 mysql 12u REG 253,5 0 85 /tmp/ibDymUYK (deleted) mysqld 30257 mysql 13w REG 253,4 45502 270719 /var/log/mysql/slow.log mysqld 30257 mysql 15w REG 253,1 107 77398029 /data/mysql/mysql-bin.000072 mysqld 30257 mysql 16u unix 0xffff88022f1a2f40 0t0 35379259 /var/run/mysqld/mysqld.sock What information can we find here? mysqld 30257 mysql cwd DIR 253,1 4096 25346049 /data/mysql MySQL data files are in /data/mysql. cwd stands for current working directory. mysqld 30257 mysql 1w REG 253,4 10229 270851 /var/log/mysql/mysql.err mysqld 30257 mysql