Abhishek Tiwari abhishektiwari

On Tue Oct 27, 2015, history.state.gov began buckling under load, intermittently issuing 500 errors. Nginx's error log was sprinkled with the following errors:

2015/10/27 21:48:36 [crit] 2475#0: accept4() failed (24: Too many open files)

2015/10/27 21:48:36 [alert] 2475#0: *7163915 socket() failed (24: Too many open files) while connecting to upstream...

An article at http://www.cyberciti.biz/faq/linux-unix-nginx-too-many-open-files/ provided directions that mostly worked. Below are the steps we followed. The steps that diverged from the article's directions are marked with an *.

* Instead of using su to run ulimit on the nginx account, use ps aux | grep nginx to locate nginx's process IDs. Then query each process's file handle limits using cat /proc/pid/limits (where pid is the process id retrieved from ps). (Note: sudo may be necessary on your system for the cat command here, depending on your system.)
Added fs.file-max = 70000 to /etc/sysctl.conf

Twelve Go Best Practices

Francesc Campoy Flores Gopher at Google @francesc http://campoy.cat/+

http://golang.org

Best practices

	You are Manus, an AI agent created by the Manus team.

	You excel at the following tasks:
	1. Information gathering, fact-checking, and documentation
	2. Data processing, analysis, and visualization
	3. Writing multi-chapter articles and in-depth research reports
	4. Creating websites, applications, and tools
	5. Using programming to solve various problems beyond development
	6. Various tasks that can be accomplished using computers and the internet

	{
	"printWidth": 120,
	"proseWrap": "always",
	"semi": false,
	"overrides": [
	{
	"files": ["*.html"],
	"options": {
	"parser": "go-template"
	}

	/**
	This is in a Nodejs environment
	*/

	const crypto = require('crypto');

	module.exports = (
	email = '',
	name = 'Anonymous',
	initialsAvatarBackground = '000000',

	{% extends "base.html" %}

	{% block content %}
	<form method="post">{% csrf_token %}
	{{ forms.subscription }}
	<input type="submit" value="Subscribe">
	</form>
	<form method="post">{% csrf_token %}
	{{ forms.contact }}
	<input type="submit" value="Send">

	<!-- Make sure you have Semantic-UI libs include
	Also, Ensure you import jQuery for smooth transition
	Once you have all the imports add this to your html:

	<script type="text/javascript">
	$(document).ready(function() {
	$('.dropdown').dropdown();
	$('.ui.checkbox').checkbox();
	});
	</script>

	# Copyright 2018 Simon Davy
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy
	# of this software and associated documentation files (the "Software"), to deal
	# in the Software without restriction, including without limitation the rights
	# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	# copies of the Software, and to permit persons to whom the Software is
	# furnished to do so, subject to the following conditions:
	#
	# The above copyright notice and this permission notice shall be included in

	class MultipleFieldLookupORMixin(object):
	"""
	Actual code http://www.django-rest-framework.org/api-guide/generic-views/#creating-custom-mixins
	Apply this mixin to any view or viewset to get multiple field filtering
	based on a `lookup_fields` attribute, instead of the default single field filtering.
	"""
	def get_object(self):
	queryset = self.get_queryset() # Get the base queryset
	queryset = self.filter_queryset(queryset) # Apply any filter backends
	filter = {}

	user web;

	# One worker process per CPU core.
	worker_processes 8;

	# Also set
	# /etc/security/limits.conf
	# web soft nofile 65535
	# web hard nofile 65535
	# /etc/default/nginx