How to confirm memcache memory increase?

Question

Alright, I have downloaded /etc/sysconfig/memcache

And edited the file that contained "PORT="11211" USER="memcached" MAXCONN="1024" CACHESIZE="64" OPTIONS="" to 1000 cachesize. I uploaded the file back to the server. Now I know there is a way to check if the changes took effect, but I cant remember how. I tried "memcached-tool 127.0.0.1:11211 stats" but it didnt show me the RAM size.

Any help would be appreciated.

Answer 1

The "stats" command should display the cache size as "limit_maxbytes". For example, the following command:

[user@server ~]$ printf 'stats\n' | nc 127.0.0.1 11211 | grep limit_maxbytes
STAT limit_maxbytes 67108864
[user@server ~]$ 

In my case, I'm using the default of 64MB, but if I up it to 128 and restart, the value goes up accordingly. Are you SURE that your "memcached-tool" output isn't showing the limit_maxbytes value?

Answer 2

You could check using ps.

ps -eo cmd,size | grep -i memcached 

from man ps.

size = memory size in kilobytes

Make sure that memcached has been loaded with data, I don't think it will request more memory then it is using so you may not hit your cachesize until it is full.

Answer 3

You can telnet to the memcached server and get commands that way. I.e.,

$ telnet localhost 11211
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
get cachesize

(source)