yanmhlv

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

yanmhlv

#Newbie programmer
def factorial(x):
    if x == 0:
        return 1
    else:
        return x * factorial(x - 1)
print factorial(6)


#First year programmer, studied Pascal

yanmhlv

# Elixir + Phoenix Framework 1.3 + Guardian + JWT(Refresh, Revoke, Recover) + Comeonin

### User model bootstrap
Let's generate User model and controller.

```bash
mix ecto.create # create DB table
mix phx.gen.json Accounts User users email:string password_hash:string # scaffold users structure
```

yanmhlv

--- PSQL queries which also duplicated from https://github.com/anvk/AwesomePSQLList/blob/master/README.md
--- some of them taken from https://www.slideshare.net/alexeylesovsky/deep-dive-into-postgresql-statistics-54594192

-- I'm not an expert in PSQL. Just a developer who is trying to accumulate useful stat queries which could potentially explain problems in your Postgres DB.

------------
-- Basics --
------------

-- Get indexes of tables

yanmhlv

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

yanmhlv

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

yanmhlv

package main

import (
	"compress/gzip"
	"io"
	"net/http"
	"strings"
)

type gzipResponseWriter struct {

yanmhlv

#!/bin/bash
#####################################################
# Name: Bash CheatSheet for Mac OSX
# 
# A little overlook of the Bash basics
#
# Usage:
#
# Author: J. Le Coupanec
# Date: 2014/11/04

yanmhlv

#!/usr/bin/env bash

if [ ! -f /tmp/linux ]; then
    curl -sS https://www.linux.org.ru/ | egrep -o /tag/[0-9a-z-]+ | sed 's|/tag/||' > /tmp/linux
fi
if [ ! -f /tmp/pron ]; then
    curl -sS http://www.xvideos.com/tags  | egrep -o /tags/[a-z0-9-]+ | sed 's|/tags/||' > /tmp/pron
fi

yanmhlv

- Haskell Mergesort
- Copyright (C) 2014 by Kendall Stewart


First we define a couple of helper functions that
will be useful in splitting the list in half:

> fsthalf :: [a] -> [a]
> fsthalf xs = take (length xs `div` 2) xs