Hi Andrin,

have you tried the Max Idle Instances knob? If you set it to 1 for
example you will only be billed for the instances that are used + 1
idle instance.

On Sep 5, 10:11 am, Andrin von Rechenberg <[email protected]> wrote:
> Hi there
>
> We are running a Python GAE service called MiuMeet.
>
> The current cost is about $296 per day. In November it will be $600 per day.
>
> Most of our cost comes from the Frontend Instance hours. We apparently need
> 4677h per day, thats roughly 200 instances. We peak at around 240 qps. The
> average latency is 800ms / request. 240 * 0.8 => 192. So it seems 200
> instances
> is exactly what we need at peak.
>
> However our instances are only 25% active, see here:http://bit.ly/pXZH4t
>
> We need someone to talk to about the new pricing model and what can be done.
> Idle instances will cost us an extra $10k per month. We can't afford that.
>
> The biggest problem we see is that it seems that AppEngine instances are
> idle
> often by design: The datastore is slow you have to wait and idle around,
> that's
> a fact for us.
>
> We would be really grateful for any advice.
>
> -Andrin, Founder of MiuMeet
>
> PS: Here is our billing comparison
>
>   Resource Used Free Billable Charge *CPU Time:*
> $0.10/CPU hour 2,797.15 6.50 2,790.65 $279.07 *Bandwidth Out:*
> $0.12/GByte 109.32 1.00 108.32 $13.00 *Bandwidth In:*
> $0.10/GByte 30.55 1.00 29.55 $2.96 *Stored Data:*
> $0.005/GByte-day 101.13 1.00 100.13 $0.51 *Recipients Emailed:*
> $0.10/1000 Emails 0.00 2.00 0.00 $0.00 *High Replication Storage:*
> $0.008/GByte-day 109.92 0.50 109.42 $0.88 *Backend Usage:*
> Prices<http://code.google.com/appengine/docs/billing.html#Billable_Quota_Uni...>
> $0.00 $0.72 $0.00 $0.00 *Always On:*
> $0.30/Day No - - $0.00 *Total:* $296.42
>  Estimated Charges Under New Pricing
>
> The charges below are estimates of what you would be paying once App
> Engine's new pricing
> model<http://www.google.com/enterprise/cloud/appengine/pricing.html>
> goes
> live. The amounts shown below are for your information only, they are not
> being charged and therefore do not affect your balance.
>
> If you would like to optmize your application to reduce your costs in the
> future, make sure to read our Optimization
> Article<http://code.google.com/appengine/articles/managing-resources.html>.
> If you have any additional questions or concerns, please contact us at:
> [email protected].
>  Frontend Instance Hour costs reflect a 50% price reduction active until
> November 20th, 2011.
>  Resource Used Free Billable Charge *Frontend Instance Hours:*
> $0.04/Hour 4,677.04 24.00 4,653.04 $186.13 *Backend Instance Hours:*
> $0.08/Hour 0.00 9.00 0.00 $0.00 *Datastore Storage:*
> $0.008/GByte-day 109.92 1.00 108.92 $0.88 *Blobstore Storage:*
> $0.0057/GByte-day 101.13 5.00 96.13 $0.55 *Datastore Writes:*
> $1.00/Million Ops 55.69 0.05 55.64 $55.64 *Datastore Reads:*
> $0.70/Million Ops 87.12 0.05 87.07 $60.95 *Small Datastore Operations:*
> $0.10/Million Ops 192.77 0.05 192.72 $19.28 *Bandwidth In:*
> $0.10/GByte 30.55 1.00 29.55 $2.96 *Bandwidth Out:*
> $0.15/GByte 109.32 1.00 108.32 $16.25 *Emails:*
> $0.01/100 Messages 0.00 1.00 0.00 $0.00 *XMPP Stanzas:*
> $0.01/1000 Stanzas 0.00 1.00 0.00 $0.00 *Opened Channels:*
> $0.01/100 Opens 7,180.91 1.00 7,179.91 $71.80 *Total*:* (before clipping to
> daily budget) $414.44
>
> * Note this total does not take into account the minimum per-application
> charge in the new pricing
> model<http://www.google.com/enterprise/appengine/appengine_pricing.html>
> .

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