Hi John, On Tue, Nov 22, 2011 at 9:31 AM, John Tantalo <john.tant...@gmail.com> wrote: > I have an index on one field of my model which I use for exact-match lookups > (i.e., no range queries). > When a query matches, I expect to get the records which match the value. > When it doesn't match (when it "missed"), I expect to get no records. > I believe the "missed" cases count towards my datastore read operations > quota, even though no datastore read operations were performed. > My intuition is that the index and the datastore are two separate things, > and read of the index should be free. In other words, read operations which > do not return any records should be free and not count towards the datastore > read quota. > Am I way off?
A query will always cost you at least one datastore read. This page shows how various high-level operations translate into the quota used: http://code.google.com/appengine/docs/billing.html#Billable_Resource_Unit_Cost Cheers, Brian > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/google-appengine/-/FLFbvLe795cJ. > To post to this group, send email to google-appengine@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
