1MK-PURGE-LOGS(1)      User Contributed Perl Documentation     MK-PURGE-LOGS(1)
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NAME

6       mk-purge-logs - Purge binary logs on a master based on purge rules.
7

SYNOPSIS

9       Usage: mk-purge-logs [OPTION...] DSN
10
11       mk-purge-logs purges binary logs on a MySQL server, based on purge
12       rules.
13
14       Print and purge all unused binary logs on master:
15
16         mk-purge-logs --print --purge h=master
17
18       Silently purge oldest binary logs on master until their total size is
19       less than 1M:
20
21         mk-purge-logs --purge-rules total_size --total-size 1M h=master
22
23       Purge oldest, unused binary logs on master until their total size is
24       less than 500k, print information about work done:
25
26         mk-purge-logs --purge-rules unused,total_size --total-size 500k \
27           --verbose h=master
28

RISKS

30       The following section is included to inform users about the potential
31       risks, whether known or unknown, of using this tool.  The two main
32       categories of risks are those created by the nature of the tool (e.g.
33       read-only tools vs. read-write tools) and those created by bugs.
34
35       mk-purge-logs purges (deletes) binary logs on a master based on
36       "--purge-rules" when "--purge" is specified.  Specifying the wrong
37       "--purge-rules" could delete binary logs that are still needed.
38
39       At the time of this release, we know of no bugs that could cause
40       serious harm to users.
41
42       The authoritative source for updated information is always the online
43       issue tracking system.  Issues that affect this tool will be marked as
44       such.  You can see a list of such issues at the following URL:
45       <http://www.maatkit.org/bugs/mk-purge-logs>.
46
47       See also "BUGS" for more information on filing bugs and getting help.
48

DESCRIPTION

50       mk-purge-logs purges binary logs on a master based on "--purge-rules"
51       by executing "PURGE BINARY LOGS TO".
52

OPTIONS

54       Specify at least one of "--purge" or "--print".
55
56       This tool accepts additional command-line arguments.  Refer to the
57       "SYNOPSIS" and usage information for details.
58
59       --ask-pass
60           group: Connection
61
62           Prompt for a password when connecting to MySQL.
63
64       --config
65           type: Array
66
67           Read this comma-separated list of config files; if specified, this
68           must be the first option on the command line.
69
70       --defaults-file
71           short form: -F; type: string; group: Connection
72
73           Only read mysql options from the given file.  You must give an
74           absolute pathname.
75
76       --dry-run
77           Print but do not execute the "--purge" statement (disables
78           "--purge").
79
80           Specifying this option allows you to test what mk-purge-logs would
81           do if "--purge" were specified without "--dry-run".  The SQL
82           statement for "--purge" is printed to STDOUT, like:
83
84             This is a dry-run.  The following SQL statement would be executed
85             by specifying --purge without --dry-run:
86             PURGE BINARY LOGS TO ? mysql-bin.000003
87
88           The first line lets you know that "--dry-run" is in effect and the
89           line after it is the SQL statement that would be executed on the
90           server with the "?"  replaced by the binary log file name that
91           follows it.
92
93           See also "--print".
94
95       --help
96           Show help and exit.
97
98       --password
99           short form: -p; type: string; group: Connection
100
101           Password to use when connecting.
102
103       --port
104           short form: -P; type: int; group: Connection
105
106           Port number to use for connection.
107
108       --print
109           Print which binary logs "--purge" will purge.
110
111           This option prints each binary log file name and its size to STDOUT
112           that would be purged if all the "--purge-rules" pass and "--purge"
113           is specified.  Purging uses the MySQL "PURGE BINARY LOGS TO"
114           command which only specifies the binary log file name to purge to,
115           not the binary logs before it.  This option will print the binary
116           logs before the purge to binary log.
117
118           See also "--dry-run".
119
120       --purge
121           Purge (delete) binary logs that match all "--purge-rules".  The
122           server's master binary logs are purged using "PURGE BINARY LOGS"
123           when this option is specified and all "--purge-rules" pass.  Else,
124           no binary logs are purged.
125
126           Specify "--print" to see which binary logs are purged and their
127           sizes, else all binary logs are purged silently unless there is an
128           error.
129
130           See also "--dry-run".
131
132       --purge-rules
133           type: Hash; default: unused
134
135           Match binary logs that pass all of the specified rules.  The rules
136           are mutually inclusive, so only binary logs that pass all rules are
137           purged.
138
139           Some rules, like "total_size", require an extra option to specify
140           their value.
141
142           •   total_size
143
144               Purge oldest binary logs until the total size of all binary
145               logs is less than "--total-size".  "SHOW BINARY LOGS" lists the
146               size of each binary log.  If the total of these sizes is
147               greater than "--total-size", then the oldest binary logs are
148               purged until the total size is less than or equal to
149               "--total-size".
150
151           •   unused
152
153               Purge binary logs that are no longer being read by any slaves.
154               When this rule is specified, mk-purge-logs will recurse to the
155               server's first-level slaves (i.e. only direct slaves of the
156               server) and "SHOW SLAVE STATUS" to find which master binary
157               logs they are reading.  Master binary logs not being read by
158               any slaves are unused and will be purged.
159
160       --recursion-method
161           type: string
162
163           Preferred recursion method for discovering slaves.
164
165           Possible methods are:
166
167             METHOD       USES
168             ===========  ================
169             processlist  SHOW PROCESSLIST
170             hosts        SHOW SLAVE HOSTS
171
172           The processlist method is preferred because SHOW SLAVE HOSTS is not
173           reliable.  However, the hosts method is required if the server uses
174           a non-standard port (not 3306).  Usually mk-purge-logs does the
175           right thing and finds the slaves, but you may give a preferred
176           method and it will be used first.  If it doesn't find any slaves,
177           the other methods will be tried.
178
179       --set-vars
180           type: string; default: wait_timeout=10000; group: Connection
181
182           Set these MySQL variables.  Immediately after connecting to MySQL,
183           this string will be appended to SET and executed.
184
185       --socket
186           short form: -S; type: string; group: Connection
187
188           Socket file to use for connection.
189
190       --total-size
191           type: size
192
193           Purge oldest binary logs until their total size is less than this
194           amount.
195
196           This option specifies the value for the "--purge-rules"
197           "total_size" value.
198
199       --user
200           short form: -u; type: string; group: Connection
201
202           User for login if not current user.
203
204       --verbose
205           short form: -v; default: 0
206
207           Print information about binary logs found and purged.  By default
208           mk-purge-logs operates silently, except for errors which are
209           printed to STDERR.  Specifying this option prints extra information
210           to STDOUT about what the tool is doing.
211
212       --version
213           Show version and exit.
214

DSN OPTIONS

216       These DSN options are used to create a DSN.  Each option is given like
217       "option=value".  The options are case-sensitive, so P and p are not the
218       same option.  There cannot be whitespace before or after the "=" and if
219       the value contains whitespace it must be quoted.  DSN options are
220       comma-separated.  See the maatkit manpage for full details.
221
222       •   A
223
224           dsn: charset; copy: yes
225
226           Default character set.
227
228       •   D
229
230           dsn: database; copy: yes
231
232           Default database.
233
234       •   F
235
236           dsn: mysql_read_default_file; copy: yes
237
238           Only read default options from the given file
239
240       •   h
241
242           dsn: host; copy: yes
243
244           Connect to host.
245
246       •   p
247
248           dsn: password; copy: yes
249
250           Password to use when connecting.
251
252       •   P
253
254           dsn: port; copy: yes
255
256           Port number to use for connection.
257
258       •   S
259
260           dsn: mysql_socket; copy: yes
261
262           Socket file to use for connection.
263
264       •   u
265
266           dsn: user; copy: yes
267
268           User for login if not current user.
269

DOWNLOADING

271       You can download Maatkit from Google Code at
272       <http://code.google.com/p/maatkit/>, or you can get any of the tools
273       easily with a command like the following:
274
275          wget http://www.maatkit.org/get/toolname
276          or
277          wget http://www.maatkit.org/trunk/toolname
278
279       Where "toolname" can be replaced with the name (or fragment of a name)
280       of any of the Maatkit tools.  Once downloaded, they're ready to run; no
281       installation is needed.  The first URL gets the latest released version
282       of the tool, and the second gets the latest trunk code from Subversion.
283

ENVIRONMENT

285       The environment variable "MKDEBUG" enables verbose debugging output in
286       all of the Maatkit tools:
287
288          MKDEBUG=1 mk-....
289

SYSTEM REQUIREMENTS

291       You need Perl, DBI, DBD::mysql, and some core packages that ought to be
292       installed in any reasonably new version of Perl.
293

BUGS

295       For a list of known bugs see
296       <http://www.maatkit.org/bugs/mk-purge-logs>.
297
298       Please use Google Code Issues and Groups to report bugs or request
299       support: <http://code.google.com/p/maatkit/>.  You can also join
300       #maatkit on Freenode to discuss Maatkit.
301
302       Please include the complete command-line used to reproduce the problem
303       you are seeing, the version of all MySQL servers involved, the complete
304       output of the tool when run with "--version", and if possible,
305       debugging output produced by running with the "MKDEBUG=1" environment
306       variable.
307

COPYRIGHT, LICENSE AND WARRANTY

309       This program is copyright 2010-2011 Percona Inc.  Feedback and
310       improvements are welcome.
311
312       THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
313       WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
314       MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
315
316       This program is free software; you can redistribute it and/or modify it
317       under the terms of the GNU General Public License as published by the
318       Free Software Foundation, version 2; OR the Perl Artistic License.  On
319       UNIX and similar systems, you can issue `man perlgpl' or `man
320       perlartistic' to read these licenses.
321
322       You should have received a copy of the GNU General Public License along
323       with this program; if not, write to the Free Software Foundation, Inc.,
324       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
325

AUTHOR

327       Daniel Nichter, Baron Schwartz
328

ABOUT MAATKIT

330       This tool is part of Maatkit, a toolkit for power users of MySQL.
331       Maatkit was created by Baron Schwartz; Baron and Daniel Nichter are the
332       primary code contributors.  Both are employed by Percona.  Financial
333       support for Maatkit development is primarily provided by Percona and
334       its clients.
335

VERSION

337       This manual page documents Ver 0.9.0 Distrib 7540 $Revision: 7531 $.
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341perl v5.34.0                      2021-07-22                  MK-PURGE-LOGS(1)
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