How does Objectify query works

Question

Suppose I have this code:

    Query<Car> q = ofy().load().type(Car.class);
    for (Car car : q) {
        // Do something with car...
    }

How does Query<T> works, suppose the datastore contains million records, will Query load all Car objects into the memory or it will fetch it one by one from the datastore?

score 1 · Accepted Answer · edited May 23 '17 at 12:04

1

The default chunk size is 30 - see here. Prefetch size is not set so it defaults to chunk size.

So, iterator will fetch 30 Entities at a time.

edited May 23 '17 at 12:04

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answered Oct 18 '12 at 19:54

Peter Knego

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How does Objectify query works

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