Question

I am running a webapp on google appengine with python and my app lets users post topics and respond to them and the website is basically a collection of these posts categorized onto different pages.

Now I only have around 200 posts and 30 visitors a day right now but that is already taking up nearly 20% of my reads and 10% of my writes with the datastore. I am wondering if it is more efficient to use the google app engine’s built in get_by_id() function to retrieve posts by their IDs or if it is better to build my own. For some of the queries I will simply have to use GQL or the built in query language because they are retrieved on more than just and ID but I wanted to see which was better.

Thanks!

Answer 1

Are you doing efficient caching? (or any caching at all).

Also, if you’re using that many writes for 300 posts, seems like you might have a problem with your models. Have you looked at the Datastore viewer to seem how many writes you use per entity?

You might read the docs on Exploding indexes, maybe that’s part of your problem?

It’s way better to use get_by_id(). It finds the exact object, and costs way less (counts as a query with only one entity).