Hi,
We're having some intermittent problems with memecached, and thought someone might have a suggestion for us.
We have a single memcached server using 2GB of the 4GB of system memory. Lately we've been occasionally seeing on the site <mediawiki_messge_key> instead of the contents of the message. I'm running mctest.php a few times from each of our Apache servers, and the 'get' returned is occasionally 0, but I can't seem to reproduce this problem reliably. The load on the server running memcached is very low, and the number of connections to the memcached server fall usually between 5 and 15, and we have 6 Apache servers.
Could we need more memory, or could it be a network issue? Does memcached have any commands to tell how much of the allocated memory it is using, or are there any other diagnostics I can run to shed light on the issue?
Thanks. Travis