Yes it is a shared memcache. Interesting I didn't think about that.  A
shame the jump to dedicated is so expensive. The whole point of memcache is
using it instead of datastore for performance reasons.

But $0.06 per GB per hour can easily add up to $1 a day.

Thanks

Houman Khorasani
Venus Cloud Ltd
Mobile: 07787 454 077
http://www.venuscloud.com

On Fri, Apr 8, 2016 at 7:24 PM, Barry Hunter <[email protected]> wrote:

> Is this with Shared Memcache, or you using Dedicated Memcache?
>
>
> https://cloud.google.com/appengine/docs/python/memcache/#Python_Configuring_memcache
>
>
> Remember if using Shared, you are at the 'mercy' of what the neighbouring
> applications are doing. If other apps are using memcache heavily, your keys
> may be evicted sooner.
>
>
> You perhaps lucky in the US datacenter, but have a 'noisy' neighbour on
> the EU system.
>
>
>
> On 8 April 2016 at 19:03, Hooman Korasani <[email protected]> wrote:
>
>> As strange as this may sound, I have the exact same code published on a
>> US-EAST server and on a EU server.
>> Both server have billing enabled.
>>
>> Th expiration is set to 7200 seconds.
>>
>> memcache.set(memcache_key, result_dic, 7200)
>>
>>
>> And I have cron jobs enabled to rerun the line of code above to refresh
>> the cache for the unique key.
>>
>> - description: Cache 0:20 hour
>>   url : /worker/topnews-cache-update
>>   schedule: every day 0:20
>>
>> - description: Cache 2:20 hour
>>   url : /worker/topnews-cache-update
>>   schedule: every day 2:20
>>
>>
>> This works perfectly fine for the US-EAST server.
>> Memcache dashboard shows 2,064 items in cache.
>>
>> Memcache dashboard on the EU server however looses the objects very
>> fast.  In a short amount of time the objects disappear back to zero,
>> despite the fact that the cron jobs keep running successfully.
>>
>> It is the same code deployed on the two servers, why is memcache acting
>> like this?
>>
>> Thanks,
>> Houman
>>
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