NAME

memcached-tool - A porting of memcached/memcached-tool

SYNOPSIS

General:

# Ported style from original memcached-tool
memcached-tool <host[:port] | /path/to/socket> [mode] [options]

# Without 1st arg, connects 127.0.0.1:11211 by default
memcached-tool [mode] [options]

# You can provide <addr> or <mode> by option style
memcached-tool --addr|-a <host[:port] | /path/to/socket> --mode|-m <mode> [options]
memcached-tool --mode|-m <mode> [options]

Modes Summary:

memcached-tool [addr] [options]          # same with 'display'
memcached-tool [addr] display  [options] # show slabs
memcached-tool [addr] stats    [options] # show general stats
memcached-tool [addr] settings [options] # show settings stats
memcached-tool [addr] dump     [options] # dumps keys and values

Mode for Development:

memcached-tool [addr] sizes [options]    # shows sizes stats

Type memcached-tool man to check the risk of this command.

Help or Manual:

memcached-tool help|-h|--help
memcached-tool man|--man

DESCRIPTION

This script is a porting of memcached/memcached-tool which is in the public domain.

Follwing description comes from man(1) of original memcached-tool:

The first parameter specifies the address of the daemon either by a hostname, optionally followed by the port number (the default is 11211), or a path to UNIX domain socket. The second parameter specifies the mode in which the tool should run.

MODES

Following description comes from man(1) or usage of original memcached-tool.

• display

  Print slab class statistics. This is the default mode if no mode is specified. The printed columns are:

  • #

    Number of the slab class.

  • Item_Size

    The amount of space each chunk uses. One item uses one chunk of the appropriate size.

  • Max_age

    Age of the oldest item in the LRU.

  • Pages

    Total number of pages allocated to the slab class.

  • Count

    Number of items presently stored in this class. Expired items are not automatically excluded.

  • Full?

    Yes if there are no free chunks at the end of the last allocated page.

  • Evicted

    Number of times an item had to be evicted from the LRU before it expired.

  • Evict_Time

    Seconds since the last access for the most recent item evicted from this class.

  • OOM

    Number of times the underlying slab class was unable to store a new item.

• stats

  Print general-purpose statistics of the daemon. Each line contains the name of the statistic and its value.

• dump

  Make a partial dump of the cache written in the add statements of the memcached protocol.

• settings

  Show settings stats.

• sizes

  Shows sizes stats.

  WARNING: This is a development command.

  As of 1.4 it is still the only command which will lock your memcached instance for some time.

  If you have many millions of stored items, it can become unresponsive for several minutes.

  Run this at your own risk. It is roadmapped to either make this feature optional or at least speed it up.

OPTIONS

• -t|--timeout=Int

  Sets connection timeout. Default is 5 seconds.

• -d|--debug

  Shows debug logs.

SEE ALSO

App::Memcached::Tool, memcached(1), http://www.memcached.org/

AUTHORS

YASUTAKE Kiyoshi yasutake.kiyoshi@gmail.com

LICENSE

Copyright (C) 2015 YASUTAKE Kiyoshi.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. That means either (a) the GNU General Public License or (b) the Artistic License.