Home/ Questions/Q 5965257
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-22T19:34:45+00:00

I’m trying to optimize code that reads objects from Google’s datastore. Using Java and

  • 0

I’m trying to optimize code that reads objects from Google’s datastore. Using Java and JDO, here is my code:

List<Article> articles = (List<Article>) query.execute(articleId);
List<Article> detatchedArticles = (List<Article>) pm.detachCopyAll(articles);

When I look at the appstats logs, this results in:

datastore_v3.RunQuery   11ms (195ms api)
datastore_v3.Next   15ms (183ms api)
datastore_v3.Next   11ms (183ms api)
datastore_v3.Next   4ms (183ms api)

So, my question is; can I tweak somehow (JDO settings, other settings) how many objects that are fetched from the datastore per datastore_v2.Next?

I’m trying to win some API megacycles. Or, a lot, if what I want is possible.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    If you are not already doing so, I would suggest using memcache. Depending on your entities, you could simply enable this in the jdoconfig.xml. Here’s a short howto: http://ukena.de/content/enabling-jdo-caching-google-app-engine. Note that if you are using embedded entities, you will have to handle memcache manually due to some bug in GAE’s JDO implementation.

    • 0