Memcache failing fetch about once every 5 or 6 seconds.

[Eurig Jones]

Also I experienced an seperate issue yesterday of which I had no
alternative but to implement an emergency patch.

I had a memcache fetching a boolean on each request. The fetch started
failing about 1 request every 6 seconds (I had load of about 6 req/sec
at the the time), so I had to do an emergency patch to remove the
memcache fetch.

This has never happened before, and GAE status was not reporting any
issues.

Has limits now been imposed on memcache?

[Gerald Tan]

AFAIK there is no uptime guarantees on memcache, and I see memcache failures appearing from time to time.
Your app should probably be written to handle memcache exceptions gracefully.

[Eurig Jones]

Something definitely changed a day or so ago. Memcache was
consistently failing 1 request per 5 or 6 seconds. My app accounts for
failures, but it's never done that before, suggesting that something
changed.

[James Broberg]

Memcache performance for my app has gone down the tube. Gets and sets
that used to take 10-20ms are now taking seconds, making it
significantly slower than just going straight to the datastore:

http://code.google.com/p/googleappengine/issues/detail?id=6167

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