When Active Record tries to connect to Postgres, it does so using the pg gem, which then uses the libpq bindings. The pg gem links to the libpq client library (via a shared object). Uri = URI.parse(" Net::HTTP.get_response(uri) It is used by other languages for example, in Ruby, ActiveRecord uses the pg gem to power its PostgreSQL support. We’ll use Net::HTTP to fetch a URL to simulate remote API calls: class AverageController < ApplicationController We’ll use PostgreSQL’s pg_sleep function to simulate slow SQL queries: class AverageController < ApplicationControllerĪctiveRecord::("select * from pg_sleep(#)")
Ruby pg gem view result code#
We need some way to simulate ActiveRecord queries, network IO, and calls to native extension C code - all typical things average Rails applications do.įor all endpoints, we accept a sleep_time parameter in the URL, designating how long to sleep. Time for Falcon to spread its wings and show us what it’s got! We’ll test Falcon with a simple Rails 5 app running on Ruby 2.5, running in production mode. True only on ruby 2.4+, as it requires clone(freeze: false). A Fiber can be thought of like a more lightweight Thread, but the Ruby VM doesn’t handle the Fiber scheduling - the fibers themselves must coordinate to schedule execution. For more information, see the Dataset Basics guide. It is actually a bug in the parameter count defined in the Ruby interface.
Ruby pg gem view result driver#
The current driver has this nasty little bug that prevents you from setting the connection to nonblocking. If you installed the Gem version of Net::LDAP, and depending on your version of Ruby and rubygems, you may also need to require rubygems explicitly: require rubygems require net/ldap Most operations with Net::LDAP start by instantiating a Net::LDAP object. Then you need to require pg in your code.
Ruby pg gem view result install#
A Ruby process can have multiple Threads which are coordinated and executed by the Ruby VM. First you will need to install the gem ('sudo gem install pg'). The gist: Falcon aims to increase throughput of web applications by using Ruby’s Fibers to be able to continue serving requests while other requests are waiting on IO (ActiveRecord queries, network requests, file read/write, etc). Each request is executed within a lightweight fiber and can block on up-stream requests without stalling the entire server process."* *a multi-process, multi-fiber rack-compatible HTTP server. The GitHub Readme describes Falcon as, ".
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