Dave Paola dpaola2
| # Hello, and welcome to makefile basics. | |
| # | |
| # You will learn why `make` is so great, and why, despite its "weird" syntax, | |
| # it is actually a highly expressive, efficient, and powerful way to build | |
| # programs. | |
| # | |
| # Once you're done here, go to | |
| # http://www.gnu.org/software/make/manual/make.html | |
| # to learn SOOOO much more. |
My largest Sidekiq application had a memory leak and I was able to find and fix it in just few hours spent on analyzing Ruby's heap. In this post I'll show my profiling setup.
As you might know Ruby 2.1 introduced a few great changes to ObjectSpace, so now it's much easier to find a line of code that is allocating too many objects. Here is great post explaining how it's working.
I was too lazy to set up some seeding and run it locally, so I checked that test suite passes when profiling is enabled and pushed debugging to production. Production environment also suited me better since my jobs data can't be fully random generated.
So, in order to profile your worker, add this to your Sidekiq configuration:
if ENV["PROFILE"]
Rich Hickey • 3 years ago
Sorry, I have to disagree with the entire premise here.
A wide variety of experiences might lead to well-roundedness, but not to greatness, nor even goodness. By constantly switching from one thing to another you are always reaching above your comfort zone, yes, but doing so by resetting your skill and knowledge level to zero.
Mastery comes from a combination of at least several of the following:
| To reset processed jobs: | |
| Sidekiq.redis {|c| c.del('stat:processed') } | |
| To reset failed jobs: | |
| Sidekiq.redis {|c| c.del('stat:failed') } | |
| To reset statistics: | |
| Sidekiq::Stats.new.reset |
Ideas are cheap. Make a prototype, sketch a CLI session, draw a wireframe. Discuss around concrete examples, not hand-waving abstractions. Don't say you did something, provide a URL that proves it.
Nothing is real until it's being used by a real user. This doesn't mean you make a prototype in the morning and blog about it in the evening. It means you find one person you believe your product will help and try to get them to use it.
| Clone URL: https://github.com/hanibash/Course-One | |
| Tests for Chapter 1: rspec spec -e step1 --require ./spec/json_formatter.rb --format JSONFormatter | |
| Tests for Chapter 2: rspec spec -e step2 --require ./spec/json_formatter.rb --format JSONFormatter | |
| Tests for Chapter 3: rspec spec -e step3 --require ./spec/json_formatter.rb --format JSONFormatter | |
| Tests for Chapter 4: rspec spec -e step4 --require ./spec/json_formatter.rb --format JSONFormatter | |
| etc... | |
| ### First Steps |
| """ | |
| A really stupid python template language inspired by coffeekup, markaby. | |
| Do not use this code, it will ruin your day. A byproduct of insomnia. | |
| TL;DR | |
| ----- | |
| This module defines a template language that allows us to do: | |
| d = Doc() |
| virtualenv --no-site-packages . | |
| source bin/activate | |
| bin/pip install Django psycopg2 django-sentry | |
| bin/pip freeze > requirements.txt | |
| bin/django-admin.py startproject mysite | |
| cat >.gitignore <<EOF | |
| bin/ | |
| include/ | |
| lib/ | |
| EOF |
| =Navigating= | |
| visit('/projects') | |
| visit(post_comments_path(post)) | |
| =Clicking links and buttons= | |
| click_link('id-of-link') | |
| click_link('Link Text') | |
| click_button('Save') | |
| click('Link Text') # Click either a link or a button | |
| click('Button Value') |