Little update after a day of debugging.
Nothing seems to have changed in memcache.
The prodeagle messup was due to a configuration error. My bad.

But I would still be *REALLY* interested in knowing if my assumptions hold.

Cheers,
-Andrin

On Thu, Feb 16, 2012 at 11:27 AM, Andrin von Rechenberg
<[email protected]>wrote:

> Hi there
>
> I suspect something has changed in the memcache setup (about 1 week ago).
>
> I'm the guy that built prodeagle which relies on a few assumptions on
> memcache.
> (
> http://googleappengine.blogspot.com/2011/10/prodeagle-analyzing-your-app-engine.html
> )
>
> This is by definition bad. I know. But it was soooooo lovely and
> convenient.
> I have a tiny memcache implementation detail question.
>
> ProdEagle works on two assumptions:
> 1) Objects with the same size that are accessed only once are FIFO freed.
> First in, First out.
> 2) The sharding function of the memcache is based on a hash.
>
> Is suspect 2) is not true anymore or never was.
> ProdEagle is a bit messed because of this.
>
> I would really appreciate if someone could tell me if 1) & 2) are true or
> not...
>
> Cheers,
> -Andrin
>

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