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

import "sync"

type Cond struct {
	lock    sync.RWMutex
	changed chan struct{}
}

func (c *Cond) Listen() <-chan struct{} {
	c.lock.RLock()
	defer c.lock.RUnlock()

yanmhlv

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
)

func handleResponse[T any](resp *http.Response, err error, t *T) error {
	if err != nil {

yanmhlv

package cond

type Cond struct {
	lock    sync.RWMutex
	changed chan struct{}
}

func newCond() *Cond {
	return &Cond{changed: make(chan struct{})}
}

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

find . -type d -depth 1 -exec git --git-dir={}/.git --work-tree=$PWD/{} pull origin master \;
# or
find . -type d  -not -path './.git*' -maxdepth 1 \( ! -name . \)

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

\x auto
\timing on


SET work_mem='512MB';
SET maintenance_work_mem='1GB';

-- Nicer PSQL prompt
-- Prompt1 / Prompt2
-- %M : server

yanmhlv

package bigfloat

import (
	"fmt"
	"math/big"
)

func Zero() *big.Float { return big.NewFloat(0.0) }

func Sub(x, y *big.Float) *big.Float { return Zero().Sub(x, y) }

yanmhlv

CREATE USER admin; -- create user with name 'admin'
ALTER USER admin WITH PASSWORD 'hello123'; -- set password

GRANT SELECT ON users TO admin; -- give 'select' access on 'users' table to 'admin' user
REVOKE SELECT ON users FROM admin; -- revoke access on 'users' table from 'admin' user

GRANT SELECT ON ALL TABLES IN SCHEMA public TO admin; -- give access to all tables in public schema to 'admin' user
REVOKE ALL ON ALL TABLES IN SCHEMA public FROM admin; -- revoke access on all tables from 'admin' user

DROP USER admin;