Here is a useful PHP tool for debugging Memcached. You will need this file – memcache.php.

Mac

Setup

If you do not have Apache running see the post Enable Apache on a Mac. Alternatively, try MAMP – adjust paths as necessary.

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$ cd ~/
$ mkdir Sites
# move memcache.php to ~/Sites/
$ cd /etc/apache2
$ sudo vi httpd.conf

Search for ‘php’ – this line specifically

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#LoadModule php5_module libexec/apache2/libphp5.so

Uncomment it (remove the leading ‘#’) and save file.

Put memcache.php in ~/Sites/. To hit it

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http://localhost/~<username>/memcache.php

memcache.php has a username/password setup

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username: memcache
password: password

Windows

If on Windows and not running Apache take a look at WAMP. In either case drop the PHP file in the appropriate place.

Telnet Debugging

For telnet to memcached

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$ telnet localhost 11211

Quick overview of the most useful telnet commands

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> stats #lists a bunch-o-stuff
> stats items #lists the slabs, example output. STAT items:3:number 1
#list the items in slab id 3 up to 100 items (doesn't seem to work if you leave off the last number, although it can be any number)
> stats cachedump 3 100
> version #version of memcached