I have found a very cool program for monitoring and debugging Memcached server, it’s called phpMemcachedAdmin. This program allows to see in real-time (top-like) or from the start of the server, stats for get, set, delete, increment, decrement, evictions, reclaimed, cas command, as well as server stats (network, items, server version) with googlecharts and server internal configuration You can go further to see each server slabs, occupation, memory wasted and items (key & value).
Another part can execute commands to any memcached server : get, set, delete, flush_all, as well as execute any commands (like stats) with telnet To extract these informations, phpMemCacheAdmin uses, as you wish, direct communication with server, PECL Memcache or PECL Memcached API.
Explanation above is an excerpt from the website. This is a simple guide how do I install phpMemCachedAdmin.
Download phpMemCachedAdmin tarball
# wget http://phpmemcacheadmin.googlecode.com/files/phpMemcachedAdmin-1.2.1-r233.tar.gz
Since we will install in /var/www/html/memcached/ directory, run this command:
# mkdir -p /var/www/html/memcached # tar -xvzf phpMemcachedAdmin-1.2.1-r233.tar.gz -C /var/www/html/memcached/ # chmod 0777 /var/www/html/memcached/Config/Memcache.php
Apache Configuration
( i’m using apache as reverse proxy backend )
# cd /etc/httpd/conf.d # vi memcached.conf
memcached.conf
<VirtualHost *:80> ServerName memcached.example.com UseCanonicalName Off ServerAdmin "webmaster@example.com" DocumentRoot "/var/www/html/memcached" CustomLog /var/log//httpd/memcached.example.com-access_log common ErrorLog /var/log/httpd/memcached.example.com-error_log </VirtualHost>
In the actual configuration, Apache only listens on ip address 127.0.0.1
Restart apache:
# service httpd restart
Nginx Configuration
( reverse proxy front end )
# cd /etc/nginx/conf.d # vi memcached.conf
Because phpMemCachedAdmin not protected with user / pass or other protection mechanisms by default, we will restrict access based on ip address. This is the easiest way. 
memcached.conf
server {
listen 80;
server_name memcached.example.com;
access_log /var/log/nginx/memcached.example.com-access.log main;
location / {
allow my.private.ip.address/32;
deny all;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://127.0.0.1:80;
}
}
Restart nginx
#service nginx restart
These are examples of phpMemCachedAdmin screenshots
You may also want to read these posts:
- Memcached Replication On Server Clusters
- Nginx Memcached module And PHP
- Sharing PHP Session In web Clusters Using Memcache
- Speeding up your website using eaccelerator and memcache/memcached
- Nginx Memcached Module, Caching Webiste Image Using Memcached
- Nginx As Reverse Proxy IPV6 to IPV4 Website
- Nginx Reverse Proxying Multiple Domains Using map Module
- nginx mod_strip module and textarea
- Nginx As imap4/pop3 Proxy Using Apache As Auth Server Backend
- Memcached And PHP, Caching Mysql Query Result
Hello,
I have 300 lines of:
Notice: Undefined index: get_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: cmd_set in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: delete_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: cas_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: cas_badval in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: incr_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: decr_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: mem_requested in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 247 Notice: Undefined index: mem_requested in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 247 Notice: Undefined index: get_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: cmd_set in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: delete_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: cas_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: cas_badval in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: incr_hits in /var/www/cachemonitor/memcache/Library/Data/Analysis.php on line 246 Notice: Undefined index: decr
on the actually seeing page.
Can you help me to fix that ?
Thanks.
i think that’s because some variables in scripts doesn’t have any values(unset) / NULL. we can just ignore it by hiding the notices like this. error_reporting(E_ALL ^ E_NOTICE); . You can also turn off error reporting in your php.ini file or .htaccess file, but it is not considered as a good solution, better look if there’s any phpMemcachedAmin update. see if new version fixed these warnings.
Thanks. I just managed by hiding the errors on the interface and puting them to the log.
Waiting for an update.
Thanks.
Dear,
I just installed as described above.
I got the following error message on my memcached server when access the admin web http://127.0.0.1:11211
<28 new auto-negotiating client connection
28: Client using the ascii protocol
28 ERROR
28 ERROR
28 ERROR
28 ERROR
28 ERROR
28 ERROR
28 ERROR
28 ERROR
28 ERROR
What is going wrong ?
Thanks,
George
that’s not the way how we access PhpMemcachedAdmin, you should point your browser to whatever you configured webserver for PhpMemcachedAdmin.
ie:
http://127.0.0.1/PhpMemcachedAdmin/
this is just an example.