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Asked: 2026-06-09T08:57:23+00:00

Tying to setup api with Sinatra App. Each request is 15MB. Every time I

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Tying to setup api with Sinatra App.

Each request is 15MB. Every time I refresh the page it adds 15MB of memory. How can I clear information after each request?

require 'rubygems'
require 'sinatra'
require 'active_record'
require 'mysql2'
require 'json'

client = Mysql2::Client.new(adapter: 'mysql2', host: '127.0.0.1', database: 'dev_app', username: 'root', password: 'root')

get '/people' do
  q = "select name, age from people;"
  people = client.query(q, :as => :json).map{|one| {one['name'] => one['age'].to_i}}
  return people.to_json
  people = nil
end
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1 Answer

  1. Editorial Team

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    You have not identified what is actually consuming memory in your application. Therefore, your issue is undefined, and any “solutions” amount to floundering around in search of a potential answer.

    Potential Answers

    1. Memory growth is not inherently a problem unless you actually run out of it. If that isn’t happening, leave it alone.
    2. The mysql2 gem has some known memory issues. That may be applicable to your scenario.
    3. Garbage collection doesn’t happen just because a variable or literal goes out of scope. There are conditions which trigger garbage collection, but you shouldn’t monkey around with it or patch your garbage collector unless you are truly memory constrained.
    4. Make sure you understand scoping in Sinatra so that you know when objects should be out of scope. However, just because objects are out of scope doesn’t mean they will be garbage-collected, just that they can be.
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