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'\" t .\" .TH "\FBMYSQLD_SAFE\FR" "1" "14/12/2015" "MariaDB 10\&.1" "MariaDB Database System" .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .\" mysqld_safe .\" tools: mysqld_safe .\" scripts .SH "NAME" mysqld_safe \- MariaDB server startup script .SH "SYNOPSIS" .HP \w'\fBmysqld_safe\ \fR\fB\fIoptions\fR\fR\ 'u \fBmysqld_safe \fR\fB\fIoptions\fR\fR .SH "DESCRIPTION" .PP \fBmysqld_safe\fR is the recommended way to start a \fBmysqld\fR server on Unix\&. \fBmysqld_safe\fR adds some safety features such as restarting the server when an error occurs and logging runtime information to an error log file\&. Descriptions of error logging is given later in this section\&. .sp \fBmysqld_safe\fR tries to start an executable named \fBmysqld\fR\&. To override the default behavior and specify explicitly the name of the server you want to run, specify a \fB\-\-mysqld\fR or \fB\-\-mysqld\-version\fR option to \fBmysqld_safe\fR\&. You can also use \fB\-\-ledir\fR to indicate the directory where \fBmysqld_safe\fR should look for the server\&. .PP Many of the options to \fBmysqld_safe\fR are the same as the options to \fBmysqld\fR\&. .PP Options unknown to \fBmysqld_safe\fR are passed to \fBmysqld\fR if they are specified on the command line, but ignored if they are specified in the [mysqld_safe] or [mariadb_safe] groups of an option file\&. .PP \fBmysqld_safe\fR reads all options from the [mysqld], [server], [mysqld_safe], and [mariadb_safe] sections in option files\&. For example, if you specify a [mysqld] section like this, \fBmysqld_safe\fR will find and use the \fB\-\-log\-error\fR option: .sp .if n \{\ .RS 4 .\} .nf [mysqld] log\-error=error\&.log .fi .if n \{\ .RE .\} .PP For backward compatibility, \fBmysqld_safe\fR also reads [safe_mysqld] sections, although you should rename such sections to [mysqld_safe] in current installations\&. .PP \fBmysqld_safe\fR supports the options in the following list\&. It also reads option files and supports the options for processing them. .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: help option .\" help option: mysqld_safe \fB\-\-help\fR .sp Display a help message and exit\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: basedir option .\" basedir option: mysqld_safe \fB\-\-basedir=\fR\fB\fIpath\fR\fR .sp The path to the MariaDB installation directory\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: core-file-size option .\" core-file-size option: mysqld_safe \fB\-\-core\-file\-size=\fR\fB\fIsize\fR\fR .sp The size of the core file that \fBmysqld\fR should be able to create\&. The option value is passed to \fBulimit \-c\fR\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: crash-script option .\" crash-script option: mysqld_safe \fB\-\-crash\-script=\fR\fB\fIfile\fR\fR .sp Script to call in the event of mysqld crashing\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: datadir option .\" datadir option: mysqld_safe \fB\-\-datadir=\fR\fB\fIpath\fR\fR .sp The path to the data directory\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: defaults-extra-file option .\" defaults-extra-file option: mysqld_safe \fB\-\-defaults\-extra\-file=\fR\fB\fIpath\fR\fR .sp The name of an option file to be read in addition to the usual option files\&. This must be the first option on the command line if it is used\&. If the file does not exist or is otherwise inaccessible, the server will exit with an error\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: defaults-file option .\" defaults-file option: mysqld_safe \fB\-\-defaults\-file=\fR\fB\fIfile_name\fR\fR .sp The name of an option file to be read instead of the usual option files\&. This must be the first option on the command line if it is used\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: flush-caches option .\" flush-caches option: mysqld_safe \fB\-\-flush\-caches\fR .sp Flush and purge buffers/caches before starting the server\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: ledir option .\" ledir option: mysqld_safe \fB\-\-ledir=\fR\fB\fIpath\fR\fR .sp If \fBmysqld_safe\fR cannot find the server, use this option to indicate the path name to the directory where the server is located\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: log-error option .\" log-error option: mysqld_safe \fB\-\-log\-error=\fR\fB\fIfile_name\fR\fR .sp Write the error log to the given file\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: malloc-lib option .\" malloc-lib option: mysqld_safe \fB\-\-malloc\-lib=\fR\fB\fIlib\fR\fR .sp Preload shared library lib if available\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: mysqld option .\" mysqld option: mysqld_safe \fB\-\-mysqld=\fR\fB\fIprog_name\fR\fR .sp The name of the server program (in the ledir directory) that you want to start\&. This option is needed if you use the MariaDB binary distribution but have the data directory outside of the binary distribution\&. If \fBmysqld_safe\fR cannot find the server, use the \fB\-\-ledir\fR option to indicate the path name to the directory where the server is located\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: mysqld-version option .\" mysqld-version option: mysqld_safe \fB\-\-mysqld\-version=\fR\fB\fIsuffix\fR\fR .sp This option is similar to the \fB\-\-mysqld\fR option, but you specify only the suffix for the server program name\&. The basename is assumed to be \fBmysqld\fR\&. For example, if you use \fB\-\-mysqld\-version=debug\fR, \fBmysqld_safe\fR starts the \fBmysqld\-debug\fR program in the ledir directory\&. If the argument to \fB\-\-mysqld\-version\fR is empty, \fBmysqld_safe\fR uses \fBmysqld\fR in the ledir directory\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: nice option .\" nice option: mysqld_safe \fB\-\-nice=\fR\fB\fIpriority\fR\fR .sp Use the nice program to set the server\'s scheduling priority to the given value\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: no-auto-restart option .\" no-auto-restart option: mysqld_safe \fB\-\-no\-auto\-restart\fR .sp Exit after starting mysqld\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: no-defaults option .\" no-defaults option: mysqld_safe \fB\-\-no\-defaults\fR .sp Do not read any option files\&. This must be the first option on the command line if it is used\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: no-watch option .\" no-watch option: mysqld_safe \fB\-\-no\-auto\-restart\fR .sp Exit after starting mysqld\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: numa-interleave option .\" numa-interleave option: mysqld_safe \fB\-\-numa\-interleave\fR .sp Run mysqld with its memory interleaved on all NUMA nodes\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: open-files-limit option .\" open-files-limit option: mysqld_safe \fB\-\-open\-files\-limit=\fR\fB\fIcount\fR\fR .sp The number of files that \fBmysqld\fR should be able to open\&. The option value is passed to \fBulimit \-n\fR\&. Note that you need to start \fBmysqld_safe\fR as root for this to work properly! .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: pid-file option .\" pid-file option: mysqld_safe \fB\-\-pid\-file=\fR\fB\fIfile_name\fR\fR .sp The path name of the process ID file\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: plugin-dir option .\" plugin-dir option: mysqld_safe \fB\-\-plugin\-dir=\fIdir_name\fR .sp Directory for client-side plugins\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: port option .\" port option: mysqld_safe \fB\-\-port=\fR\fB\fIport_num\fR\fR .sp The port number that the server should use when listening for TCP/IP connections\&. The port number must be 1024 or higher unless the server is started by the root system user\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: skip-kill-mysqld option .\" skip-kill-mysqld option: mysqld_safe \fB\-\-skip\-kill\-mysqld\fR .sp Do not try to kill stray \fBmysqld\fR processes at startup\&. This option works only on Linux\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: socket option .\" socket option: mysqld_safe \fB\-\-socket=\fR\fB\fIpath\fR\fR .sp The Unix socket file that the server should use when listening for local connections\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: syslog option .\" syslog option: mysqld_safe .\" mysqld_safe: skip-syslog option .\" skip-syslog option: mysqld_safe \fB\-\-syslog\fR, \fB\-\-skip\-syslog\fR .sp \fB\-\-syslog\fR causes error messages to be sent to syslog on systems that support the \fBlogger\fR program\&. \-\-skip\-syslog suppresses the use of syslog; messages are written to an error log file\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: syslog-tag option .\" syslog-tag option: mysqld_safe \fB\-\-syslog\-tag=\fR\fB\fItag\fR\fR .sp For logging to syslog, messages from \fBmysqld_safe\fR and \fBmysqld\fR are written with a tag of mysqld_safe and mysqld, respectively\&. To specify a suffix for the tag, use \fB\-\-syslog\-tag=\fR\fB\fItag\fR\fR, which modifies the tags to be mysqld_safe\-\fItag\fR and mysqld\-\fItag\fR\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: timezone option .\" timezone option: mysqld_safe \fB\-\-timezone=\fR\fB\fItimezone\fR\fR .sp Set the TZ time zone environment variable to the given option value\&. Consult your operating system documentation for legal time zone specification formats\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} .\" mysqld_safe: user option .\" user option: mysqld_safe \fB\-\-user={\fR\fB\fIuser_name\fR\fR\fB|\fR\fB\fIuser_id\fR\fR\fB}\fR .sp Run the \fBmysqld\fR server as the user having the name \fIuser_name\fR or the numeric user ID \fIuser_id\fR\&. (\(lqUser\(rq in this context refers to a system login account, not a MariaDB user listed in the grant tables\&.) .RE .PP If you execute \fBmysqld_safe\fR with the \fB\-\-defaults\-file\fR or \fB\-\-defaults\-extra\-file\fR option to name an option file, the option must be the first one given on the command line or the option file will not be used\&. For example, this command will not use the named option file: .sp .if n \{\ .RS 4 .\} .nf mysql> \fBmysqld_safe \-\-port=\fR\fB\fIport_num\fR\fR\fB \-\-defaults\-file=\fR\fB\fIfile_name\fR\fR .fi .if n \{\ .RE .\} .PP Instead, use the following command: .sp .if n \{\ .RS 4 .\} .nf mysql> \fBmysqld_safe \-\-defaults\-file=\fR\fB\fIfile_name\fR\fR\fB \-\-port=\fR\fB\fIport_num\fR\fR .fi .if n \{\ .RE .\} .PP The \fBmysqld_safe\fR script is written so that it normally can start a server that was installed from either a source or a binary distribution of MariaDB, even though these types of distributions typically install the server in slightly different locations\&. \fBmysqld_safe\fR expects one of the following conditions to be true: .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} The server and databases can be found relative to the working directory (the directory from which \fBmysqld_safe\fR is invoked)\&. For binary distributions, \fBmysqld_safe\fR looks under its working directory for bin and data directories\&. For source distributions, it looks for libexec and var directories\&. This condition should be met if you execute \fBmysqld_safe\fR from your MariaDB installation directory (for example, /usr/local/mysql for a binary distribution)\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} If the server and databases cannot be found relative to the working directory, \fBmysqld_safe\fR attempts to locate them by absolute path names\&. Typical locations are /usr/local/libexec and /usr/local/var\&. The actual locations are determined from the values configured into the distribution at the time it was built\&. They should be correct if MariaDB is installed in the location specified at configuration time\&. .RE .PP Because \fBmysqld_safe\fR tries to find the server and databases relative to its own working directory, you can install a binary distribution of MariaDB anywhere, as long as you run \fBmysqld_safe\fR from the MariaDB installation directory: .sp .if n \{\ .RS 4 .\} .nf shell> \fBcd \fR\fB\fImysql_installation_directory\fR\fR shell> \fBbin/mysqld_safe &\fR .fi .if n \{\ .RE .\} .PP If \fBmysqld_safe\fR fails, even when invoked from the MariaDB installation directory, you can specify the \fB\-\-ledir\fR and \fB\-\-datadir\fR options to indicate the directories in which the server and databases are located on your system\&. .PP When you use \fBmysqld_safe\fR to start \fBmysqld\fR, \fBmysqld_safe\fR arranges for error (and notice) messages from itself and from \fBmysqld\fR to go to the same destination\&. .PP There are several \fBmysqld_safe\fR options for controlling the destination of these messages: .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} \fB\-\-syslog\fR: Write error messages to syslog on systems that support the \fBlogger\fR program\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} \fB\-\-skip\-syslog\fR: Do not write error messages to syslog\&. Messages are written to the default error log file (\fIhost_name\fR\&.err in the data directory), or to a named file if the \fB\-\-log\-error\fR option is given\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} \fB\-\-log\-error=\fR\fB\fIfile_name\fR\fR: Write error messages to the named error file\&. .RE .PP If none of these options is given, the default is \fB\-\-skip\-syslog\fR\&. .if n \{\ .sp .\} .RS 4 .it 1 an-trap .nr an-no-space-flag 1 .nr an-break-flag 1 .br .ps +1 \fBNote\fR .ps -1 .br .PP .sp .5v .RE .PP If \fB\-\-syslog\fR and \fB\-\-log\-error\fR are both given, a warning is issued and \fB\-\-log\-error\fR takes precedence\&. .PP When \fBmysqld_safe\fR writes a message, notices go to the logging destination (syslog or the error log file) and stdout\&. Errors go to the logging destination and stderr\&. .PP Normally, you should not edit the \fBmysqld_safe\fR script\&. Instead, configure \fBmysqld_safe\fR by using command\-line options or options in the [mysqld_safe] section of a my\&.cnf option file\&. In rare cases, it might be necessary to edit \fBmysqld_safe\fR to get it to start the server properly\&. However, if you do this, your modified version of \fBmysqld_safe\fR might be overwritten if you upgrade MariaDB in the future, so you should make a copy of your edited version that you can reinstall\&. .PP On NetWare, \fBmysqld_safe\fR is a NetWare Loadable Module (NLM) that is ported from the original Unix shell script\&. It starts the server as follows: .sp .RS 4 .ie n \{\ \h'-04' 1.\h'+01'\c .\} .el \{\ .sp -1 .IP " 1." 4.2 .\} Runs a number of system and option checks\&. .RE .sp .RS 4 .ie n \{\ \h'-04' 2.\h'+01'\c .\} .el \{\ .sp -1 .IP " 2." 4.2 .\} Runs a check on MyISAM tables\&. .RE .sp .RS 4 .ie n \{\ \h'-04' 3.\h'+01'\c .\} .el \{\ .sp -1 .IP " 3." 4.2 .\} Provides a screen presence for the MariaDB server\&. .RE .sp .RS 4 .ie n \{\ \h'-04' 4.\h'+01'\c .\} .el \{\ .sp -1 .IP " 4." 4.2 .\} Starts \fBmysqld\fR, monitors it, and restarts it if it terminates in error\&. .RE .sp .RS 4 .ie n \{\ \h'-04' 5.\h'+01'\c .\} .el \{\ .sp -1 .IP " 5." 4.2 .\} Sends error messages from \fBmysqld\fR to the \fIhost_name\fR\&.err file in the data directory\&. .RE .sp .RS 4 .ie n \{\ \h'-04' 6.\h'+01'\c .\} .el \{\ .sp -1 .IP " 6." 4.2 .\} Sends \fBmysqld_safe\fR screen output to the \fIhost_name\fR\&.safe file in the data directory\&. .RE .SH "COPYRIGHT" .br .PP Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc., 2010-2015 MariaDB Foundation .PP This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. .PP This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. .PP You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/. .sp .SH "SEE ALSO" For more information, please refer to the MariaDB Knowledge Base, available online at https://mariadb.com/kb/ .SH AUTHOR MariaDB Foundation (http://www.mariadb.org/).