12/30/2023 0 Comments Ecto changeset preload![]() We started with the N+1 query problem, learning to identify and solve it usingĮcto's preload functionality. Using Ecto and provided insights on detecting and addressing these In this article, we explored common performance issues in Elixir applications Read more about instrumenting AppSignal for Ecto. To know what is happening to your whole stack is to instrument your application withĬonnect it to your favorite monitoring tool, like AppSignal! Monitor, since only a handful of entities can evaluate applicationĬontext like query execution time, queue time, memory consumption, etc. Final Thoughtsįrom the application point of view, there is only so much that we can actually The necessary locks within the specified time (preventing deadlocks from causingĪn application to hang indefinitely). Repo def get_all_users do event = # the name of the event start_metadata = %)) end, timeout: 5_000 )īy setting a timeout, a transaction will be rolled back if it cannot acquire # my_app/lib/user_context.ex defmodule MyApp. We'll call the schema that associates the two RoleAssignment: Suppose we have a User schema on a many-to-many relationship with a Role Significant performance hit due to an excessive number of redundant queries. This leads to one query for the parent record (1) and one query for eachĬhild record (N), resulting in N+1 queries in total. The N+1 query problem occurs when an application loads a parent record and itsĪssociated child records in separate queries. We'll discuss how to detect each issue, as well as their common causes and solutions, so you can optimize your Elixir applications for peak performance.
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