Here's some more information on how the Images service calculates the
measurements for the quotas described in Table 2-8.
Image Manipulation API Calls : The total number of times the
application accesses the Images service.
Data Sent to API : The amount of data sent to the Images service.
Because this is internal to App Engine, this metric does not
consume Outgoing Bandwidth.
Data Received from API : The amount of data received from the
Transformations executed : The number of times the service has
performed a transformation on an image for the application.
Transformations include resizing, rotating, flipping, and cropping
images. Other more advanced transformations are included in this
metric as well.
Sometimes it's more efficient for your application to create an in-memory data cache
for persistent storage across some tasks. Memcache serves this purpose for App
Engine applications. Table 2-9 outlines the quota measurements for the Memcache
Table 2-9. App Engine Quotas for the Memcache Service
Memcache API Calls
48,000 calls /
108,000 calls /
Data Sent to API
56MB / min
128MB / min
Data Received from API
284MB / min
640MB / min