> > Any thoughts on what might be going on here? > > As for vitals/system config: > > Here's a recent stats dump: > STAT pid 19986 > STAT uptime 8526687 > STAT time 1277416425 > STAT version 1.2.8
You should probably upgrade, but I think this version has what you may need... If you can reproduce this against an idle memcached, start up an instance with "-vvv" (three v's), which will tell you why a GET failed, as well as all of the parameters of any SET's/GET's you run. So you can see if the GET failed because of it expired, was evicted, expired due to a flush command (which doesn't seem to be your case), etc. You can also see if your PHP client is actually setting the timeout correctly or not.
