mysqlcheck utility commands in MySQL
mysqlcheck
mysqlcheck --help
mysqlcheck --version
Usage: mysqlcheck [OPTIONS] database [tables]
OR mysqlcheck [OPTIONS] --databases DB1 [DB2 DB3...]
OR mysqlcheck [OPTIONS] --all-databases
mysqlcheck --login-path=dba -c testdb
mysqlcheck --login-path=root -r testdb emp
mysqlcheck --login-path=dba -o devdb dept
mysqlcheck --login-path=mydba --check --all-databases --medium-check --auto-repair --compress --force --medium-check --skip-write-binlog --debug-info
mysqlcheck --login-path=local --analyze --databases mydb --compress --skip-write-binlog --debug-info
mysqlcheck --login-path=dba --check --databases devdb
mysqlcheck --login-path=dba --analyze --databases proddb
mysqlcheck --login-path=dba --repair --databases testdb
mysqlcheck --host=linux001 --port=3308 --user=root --password -c proddb
This program can be used to CHECK (-c, -m, -C), REPAIR (-r), ANALYZE (-a), or OPTIMIZE (-o) tables. Some of the options (like -e or -q) can be used at the same time. Not all options are supported by all storage engines.
Please check MySQL manual for latest information about the above.
The options -c, -r, -a, and -o are exclusive to each other, which means that the last option will be used, if several was specified.
The option -c will be used by default, if none was specified.
You can change the default behavior by making a symbolic link, or copying this file somewhere with another name, the alternatives are:
mysqlrepair: The default option will be -r
mysqlanalyze: The default option will be -a
mysqloptimize: The default option will be -o
Default options of mysql check, are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/etc/my.cnf ~/.my.cnf
The following groups are read: mysqlcheck client
The following mysqlcheck options may be given as the first argument:
--print-defaults Print the program argument list and exit.
--no-defaults Don't read default options from any option file, except for login file.
--defaults-file=# Only read default options from the given file #.
--defaults-extra-file=# Read this file after the global files are read.
--defaults-group-suffix=# Also read groups with concat(group, suffix)
--login-path=# Read this path from the login file.
-A, --all-databases Check all the databases. This is the same as --databases with all databases selected.
-a, --analyze Analyze given tables.
-1, --all-in-1 Instead of issuing one query for each table, use one query per database, naming all tables in the database in a comma-separated list.
--auto-repair If a checked table is corrupted, automatically fix it. Repairing will be done after all tables have been checked, if corrupted ones were found.
--bind-address=name IP address to bind to.
--character-sets-dir=name Directory for character set files.
-c, --check Check table for errors.
-C, --check-only-changed Check only tables that have changed since last check or haven't been closed properly.
-g, --check-upgrade Check tables for version-dependent changes. May be used with --auto-repair to correct tables requiring version-dependent updates.
--compress Use compression in server/client protocol.
-B, --databases Check several databases. Note the difference in usage; in this case no tables are given. All name arguments are regarded as database names.
-#, --debug[=#] This is a non-debug version. Catch this and exit.
--debug-check This is a non-debug version. Catch this and exit.
--debug-info This is a non-debug version. Catch this and exit.
--default-character-set=name Set the default character set.
--default-auth=name Default authentication client-side plugin to use.
--enable-cleartext-plugin Enable/disable the clear text authentication plugin.
-F, --fast Check only tables that haven't been closed properly.
--fix-db-names Fix database names.
--fix-table-names Fix table names.
-f, --force Continue even if we get an SQL error.
-e, --extended If you are using this option with CHECK TABLE, it will ensure that the table is 100 percent consistent, but will take a long time. If you are using this option with REPAIR TABLE, it will force using old slow repair with keycache method, instead of much faster repair by sorting.
-?, --help Display this help message and exit.
-h, --host=name Connect to host.
-m, --medium-check Faster than extended-check, but only finds 99.99 percent of all errors. Should be good enough for most cases.
--write-binlog Log ANALYZE, OPTIMIZE and REPAIR TABLE commands. Use --skip-write-binlog when commands should not be sent to replication slaves. (Defaults to on; use --skip-write-binlog to disable.)
--secure-auth Refuse client connecting to server if it uses old (pre-4.1.1) protocol. Deprecated. Always TRUE
-o, --optimize Optimize table.
-p, --password[=name] Password to use when connecting to server. If password is not given, it's solicited on the tty.
--plugin-dir=name Directory for client-side plugins.
-P, --port=# Port number to use for connection or 0 for default to, in order of preference, my.cnf, $MYSQL_TCP_PORT, /etc/services, built-in default (3306).
--protocol=name The protocol to use for connection (tcp, socket, pipe, memory).
-q, --quick If you are using this option with CHECK TABLE, it prevents the check from scanning the rows to check for wrong links. This is the fastest check. If you are using this option with REPAIR TABLE, it will try to repair only the index tree. This is the fastest repair method for a table.
-r, --repair Can fix almost anything except unique keys that aren't unique.
-s, --silent Print only error messages.
--skip-database=name Don't process the database specified as argument
-S, --socket=name The socket file to use for connection.
--ssl-mode=name SSL connection mode.
--ssl Deprecated. Use --ssl-mode instead. (Defaults to on; use --skip-ssl to disable.)
--ssl-verify-server-cert Deprecated. Use --ssl-mode=VERIFY_IDENTITY instead.
--ssl-ca=name CA file in PEM format.
--ssl-capath=name CA directory.
--ssl-cert=name X509 cert in PEM format.
--ssl-cipher=name SSL cipher to use.
--ssl-key=name X509 key in PEM format.
--ssl-crl=name Certificate revocation list.
--ssl-crlpath=name Certificate revocation list path.
--tls-version=name TLS version to use, permitted values are: TLSv1, TLSv1.1, TLSv1.2
--tables Overrides option --databases (-B).
--use-frm When used with REPAIR, get table structure from .frm file, so the table can be repaired even if .MYI header is corrupted.
-u, --user=name User for login if not current user.
-v, --verbose Print info about the various stages.
-V, --version Output version information and exit.
mysqlcheck variables (--variable-name=value)
and boolean options {FALSE|TRUE} Value (after reading options)
--------------------------------- ----------------------------------------
all-databases FALSE
all-in-1 FALSE
auto-repair FALSE
bind-address (No default value)
character-sets-dir (No default value)
compress FALSE
databases FALSE
default-character-set utf8
default-auth (No default value)
enable-cleartext-plugin FALSE
fast FALSE
fix-db-names FALSE
fix-table-names FALSE
force FALSE
extended FALSE
host (No default value)
write-binlog TRUE
secure-auth TRUE
plugin-dir (No default value)
port 3306
quick FALSE
silent FALSE
skip-database
socket /data/mysql/mysql.sock
ssl TRUE
ssl-verify-server-cert FALSE
ssl-ca (No default value)
ssl-capath (No default value)
ssl-cert (No default value)
ssl-cipher (No default value)
ssl-key (No default value)
ssl-crl (No default value)
ssl-crlpath (No default value)
tls-version (No default value)
use-frm FALSE
user (No default value)
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