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Peter Johansson
Asked: 2010-11-16 10:45:39 +0800 CST

How to confirm memcache memory increase?

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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.

redhat memcached memcache

3 Answers

  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?

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  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.

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  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)

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