Introduction to App Engine - Beginning Java Google App Engine - page 12

Detailed Resource Quotas
The next section will cover in more detail the specific quotas for the various
resource types as of version 1.2.5. For up-to-date information, reference the App
Engine online documentation, located at http://code.google.com/appengine . Keep
in mind that you can purchase additional billable resources through your
application's Administration Console.

Requests
App Engine Requests include the total number of requests to the application. If you
have billing enabled, there is a per-minute quota for the application, which allows for
up to 500 requests per second. That's over a billion per month! Table 2-2 shows the
types of resources that are included in the Requests allocation bucket.

Table 2-2. App Engine Quotas for Request Resources

Resource Daily Limit

(Free)

Maximum Rate
(Free)

Daily Limit
(Billing
Enabled)

Maximum Rate
(Billing
Enabled)

Requests (all requests to
application)

1.3M
requests

7,400 req /
min

43M
requests

30,000 req /
min

Outgoing Bandwidth
(billable includes HTTPS)

1GB 56MB / min 1GB free;

1,046GB max

740MB / min

Incoming Bandwidth
(billable includes HTTPS)

1GB 56MB / min 1GB free;

1,046GB max

740MB / min

CPU Time 6.5 CPU-

hrs

15 CPU-mins
/ min

6.5 CPU-hrs
free; 1,729
CPU-hrs
max

72 CPU-
mins / min

Let's take a deeper look at each of these metrics to see how they're calculated.
• Requests and Secure Requests: The total number of requests over

HTTPS to the application. These requests are measured separately
but also count toward the total number of requests.