← Ruby on Rails development

Performance Issues with Rails Applications

Pain pointTrend: NewConfidence: LowFirst seen 7/29/2026 · last seen 7/29/2026

Opportunity score

26

Mentions

3

Communities

1

Growth since last check

new

What's happening

Developers are reporting slow performance in their Ruby on Rails applications, particularly after upgrades or when handling large datasets. This includes slow query performance and issues with memory usage, which can lead to degraded user experience and increased operational costs.

Why this score: The performance issues are critical as they directly affect user experience and operational efficiency, making it a high-priority area for developers.

Who's affected

Rails developersProduct teams managing large Rails applicationsDevOps teams supporting Rails infrastructure

What people try to do

  • Trying to diagnose slow startup times
  • Investigating slow ActiveRecord queries

Why current solutions fail

  • Queries taking excessively long to execute
  • Memory spiking leading to application crashes

What to build

  • Build a performance monitoring tool specifically for Rails apps
  • Create a guide for optimizing Rails queries and memory usage
  • Develop a service to analyze and suggest improvements for Rails applications

Evidence

Rails 7 + PostgreSQL: Super slow searching data in a table having 1,2M rows. How do I speed it up?

“<p>I have a database table that having close to 100 columns - 25 columns are STRING, the rest is INT/DECIMAL/BOOL.</p> <p>This is the query that I am trying to run - the query is generated based on the search criteria users have to filter the data in the table <code>listings</code>:</p> <pre><code>S”

stackexchange · user984621 · 7/29/2024

Open original →

Ruby on Rails - Server Memory Spiking and Users getting logged out

“<p>We have a fairly typical Ruby on Rails 6.1 app with a Redis cache store which we are also using for our session store. We are using Devise and an single-page app with lots of graphql requests.</p> <p>Recently memory has been gradually increasing on the servers until hitting 95%. We're working on ”

stackexchange · Matt · 5/17/2024

Open original →

Slow ActiveRecord query mystery

“<p>This question relates to a Rails API-only application using Searchkick (with Opensearch) and PostgreSQL. Some results are taking a long time to render, and I'm seeing something like this, according to the development log:</p> <p>Opensearch query time: 10ms. Postgres query time: 7500ms (it's a &qu”

stackexchange · knirirr · 6/1/2023

Open original →

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