| # Rails + PostgreSQL Performance Audit Playbook | |
| A field-tested method for finding what's actually burning your database CPU, built for a | |
| Rails monolith on managed PostgreSQL (Cloud SQL / RDS / etc.). It assumes no APM — just | |
| `pg_stat_statements`, `pg_stat_activity`, and discipline. It pairs well with an LLM: point | |
| one at this file plus your query results and let it do the attribution; the queries below | |
| are ordered so a human can run them and paste results back. | |
| ## The core idea |
For years, people have been using jemalloc with ruby. There were various benchmarks and discussions. Legend had it that Jemalloc 5 didn't work as well as Jemalloc 3.
Then, one day, hope appeared on the horizon. @wjordan offered a config for Jemalloc 5.
FROM ruby:3.1.2-bullseye
RUN apt-get update ; \
***** UPDATE 11/29/2018: INTERCOM IS NOW ACCESSIBLE! *****
See this Tweet: https://twitter.com/destraynor/status/1067943722971672576
Read more details: https://www.intercom.com/help/faqs-and-troubleshooting/the-intercom-messenger/is-the-intercom-messenger-accessible
By default, Intercom is not accessible to people navigating with the keyboard or using screen readers. This little script is a stop-gap solution developed by the City of Asheville to comply with Section 508. It does the following:
| #!/usr/bin/env bash | |
| # On OS X, use this script to generate an encrypted deployment key for Travis CI. | |
| # Dependencies: | |
| # gem install travis | |
| # brew install coreutils | |
| if [ $# -lt 1 ]; then | |
| echo "usage: $0 <user>/<repo>" |
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| #Session controller provides a token | |
| #/controllers/api/sessions_controller.rb | |
| class Api::SessionsController < Devise::SessionsController | |
| before_filter :authenticate_user!, :except => [:create] | |
| before_filter :ensure_params_exist, :except => [:destroy] | |
| respond_to :json | |
| def create | |
| resource = User.find_for_database_authentication(:email => params[:user_login][:email]) | |
| return invalid_login_attempt unless resource |
| definegrid = function() { | |
| var browserWidth = $(window).width(); | |
| // LARGE DESKTOP & UP | |
| if (browserWidth >= 1200) | |
| { | |
| pageUnits = 'px'; | |
| colUnits = 'px'; | |
| pagewidth = 1170; | |
| columns = 12; |
| # RSpec 2.0 syntax Cheet Sheet by http://ApproachE.com | |
| # defining spec within a module will automatically pick Player::MovieList as a 'subject' (see below) | |
| module Player | |
| describe MovieList, "with optional description" do | |
| it "is pending example, so that you can write ones quickly" | |
| it "is already working example that we want to suspend from failing temporarily" do | |
| pending("working on another feature that temporarily breaks this one") |