Brett Slakin on the App Engine team gave a great talk about a problem
similar to what you are describing at last year's Google I/O and how to
solve it. You may want to check this video out:

http://code.google.com/events/io/2009/sessions/BuildingScalableComplexApps.html

<http://code.google.com/events/io/2009/sessions/BuildingScalableComplexApps.html>How
are your models current set up?

On Fri, Jan 15, 2010 at 1:10 AM, Lucian Baciu <[email protected]> wrote:

> I have a root User entity and a child Note entity. Each User can have
> many Note entities. The Note entity has four indices.
>
> I've noticed that as the number of Note entities for a User increases
> so does the request time/latency and CPU used on Note insert
> operations. When the number on Note entities for a user is about 1000,
> an insert Note request takes about 10 seconds in request time and
> about 40 seconds of CPU, which is very high and as it continues to
> increase it makes my app unusable.
>
> Is there something I can do to optimize this, or is this an app engine
> issue?
>
> Thanks,
> Lucian
>
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>
>


-- 
Ikai Lan
Developer Programs Engineer, Google App Engine
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