On Sat, Aug 25, 2012 at 5:02 AM, Kristopher Giesing
<[email protected]> wrote:
> On Friday, August 24, 2012 2:59:11 PM UTC-7, Johan Euphrosine (Google)
> wrote:
>>
>>
>> On Aug 24, 2012 11:28 PM, "Mos" <[email protected]> wrote:
>> >
>> > Thanks Johan. I read the post some days before.
>> >
>> > As often discussed on the mailing-list before and as Jeff said in this
>> > thread.
>> > It's the combination of "Requests should never be sent to cold
>> > instances."
>>
>> Please star this existing feature request:
>> http://code.google.com/p/googleappengine/issues/detail?id=7865
>
> Done.
>
>>
>> > and(!) the behavior of min idle instance which doesn't make any sense.
>>
>> Like Jon explained in the post I linked, the scheduler will favor routing
>> traffic to idle dynamic instance rather than idle reserved idle instance and
>> it will always try to maintain the invariant of N x Min-Idle-Instances by
>> starting new instance if the reserved instances are busy.
>
> OK, the post by Jon was an interesting read because it explains why Google
> seems to think everything is working as intended.  What doesn't seem to be
> penetrating is that it doesn't matter what some definition on a piece of
> paper somewhere says the system is supposed to do, if that definition
> doesn't actually help developers build good products.

It does penetrate and we do value feedbacks from the community on the scheduler.

What I was trying to point by referring to Jon post was:
- Here is how the scheduler has been designed
- If you disagree with the design, the group is a good place to
discuss this but ultimately we would like to reach the point where
more specific feature requests are filled (like
http://code.google.com/p/googleappengine/issues/detail?id=7865) that
we can escalate to the engineering team.

> The feature starred above absolutely needs to be implemented.  I just wish
> there was an easier way of getting customers who are frustrated by the
> instancing behavior to focus on that one feature request, because the naive
> interpretation of the existing GAE tuning parameters suggests it shouldn't
> be necessary.

I agree we must do a better job at documenting the current scheduler
behavior, care to star this feature request? :)
http://code.google.com/p/googleappengine/issues/detail?id=5826

>
> - Kris
>
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-- 
Johan Euphrosine (proppy)
Developer Programs Engineer
Google Developer Relations

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