Java Reference
In-Depth Information
•
The more properties an entity has defined the more resources App
Engine will require to write that entity to the datastore.
•
Queries are generally created equal with respect to resource
utilization. However, fetching results can require additional CPU
time.
Partial Units
App Engine will bill for partial units as they are incurred. Your actual usage of any resource on a
given day will be rounded down to the nearest base unit and then rounded up to the nearest
cent. The base units are as follows:
1.
CPU Time
: 1 megacycle = 1/1200 CPU second
2.
Bandwidth in/out
: 1 byte
3.
Storage
:1 byte
4.
E-mail
: 1 e-mail
Datastore
The datastore has its own set of measurements and can be budgeted as well. The
metrics and their free and billable quota limits are outlined in Table 2-3.
Table 2-3. App Engine Quotas for Datastore Resources
Resource
Daily Limit
(Free)
Maximum Rate
(Free)
Daily Limit
(Billing
Enabled)
Maximum Rate
(Billing Enabled)
Datastore API Calls
10M calls
57,000 calls /
min
140M calls
129,000 calls /
min
Stored Data *
1GB
None
1GB free; no
max
None
Data Sent to API
12GB
68MB / min
72GB
153MB / min
