MEMCACHED-TOOL

Section: User Commands (1)
Updated: Jul 2, 2013
Page Index

NAME

memcached-tool - stats and management tool for memcached

SYNOPSIS

memcached-tool <host[:port] | /path/to/socket> [mode]

DESCRIPTION

memcached-tool is a Perl script used to print statistics from a running memcached instance. 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

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 [limit]

Make a partial dump of the cache written in the add statements of the memcached protocol. If limit is given and is a strictly positive integer, then the dump is limited to that number of items.

AUTHOR

The memcached-tool script was written by Brad Fitzpatrick <brad@danga.com>