I was trying to delete all records of an entity type, 1000 entities on each request and I noticed the Google appengine headers returned from the server. The code uses the low level datastore api and it is a very basic piece of code.
Query the datastore for the entity kind without any criteria. Fetch 1000 entities Store the entity keys in a List<Key> call datastore.delete(Iterable<Key>) method to delete the entities. No problem about these. But the google headers returned from the server about the resource consumption and an estimation of cost really confused me... X-Appengine-Estimated-CPM-US-Dollars: $4.089296 X-Appengine-Resource-Usage: ms=332 cpu_ms=176178 api_cpu_ms=176015 AFAIK the estimated dollars mean that if I make 1000 requests like this, it would cost me ~ $4. Don't you think it is a bit expensive??? I know this isn't a very common scenario, but really is it worth $4? And I don't really understand the meaning of resource header... The server returns the response immediately, as stated in the ms=332 value.. How is the cpu_ms and api_cpu_ms calculated? If the response was generated in 0.3 seconds, what does 17.6 seconds of cpu time mean? Thanks Erdinc --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
