Hi, I am designing my data model and planning to use following KeysOnly query to perform a count(*) with some filter conditions by a daily cron job.
FetchOptions fetchOptions = FetchOptions.Builder.withOffset(0).limit (Integer.MAX_VALUE); DatastoreService.prepare(query).asList(fetchOptions).size(); Here are my questions: 1, if I use an ancestor query (in a transaction) over an entity group with around 1 million records of this kind, how is the performance? 2, if I use an ancestor query without a transaction (to avoid locking whole entity group), how is the performance? 3, if I use a normal query over around 1k entity groups with around 10 million records of this kind, how is the performance? Many thanks. -- 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 google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
