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sudo sysctl -w kern.maxfiles=75000
sudo sysctl -w kern.maxfilesperproc=75000
ulimit -S -n 75000

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Sample config for 2 million web socket connection

    sysctl -w fs.file-max=12000500
    sysctl -w fs.nr_open=20000500
    # Set the maximum number of open file descriptors
    ulimit -n 20000000

    # Set the memory size for TCP with minimum, default and maximum thresholds 
 sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'

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<?php
/**
 * imap-attachment.php
 *
 * @author hakre <hakre.wordpress.com>
 * @link http://stackoverflow.com/questions/9974334/how-to-download-mails-attachment-to-a-specific-folder-using-imap-and-php
 */

/**
 * Utility Class

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const puppeteer = require('puppeteer');

class Webpage {
    static async generatePDF(url) {
        const browser = await puppeteer.launch({ headless: true }); // Puppeteer can only generate pdf in headless mode.
        const page = await browser.newPage();
        await page.goto(url, {  waitUntil: 'load'  }); // Adjust network idle as required. 
        const pdfConfig = {
            path: 'url.pdf', // Saves pdf to disk. 
            format: 'A4',

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#!/usr/bin/env python3

from argparse import ArgumentParser
from multiprocessing import Pool, freeze_support
import socket


def ip2num(ip):
    a,b,c,d = [int(v) for v in ip.split('.')]
    return ((a*256+b)*256+c)*256+d

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import time


class memoize(object):
    def __init__(self, timeout=60):
        self.cache = {}
        self.timeout = timeout

    def _flush(self):
        now = time.time()

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#!/usr/bin/env python3

import argparse
from math import ceil, floor


sign = lambda amt: -1 if amt<0 else (1 if amt>0 else 0)


class dobj:

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def long_liq_price(wallet_balance_btc, qty, price):
    usd = qty * int(-100000000 / price - 0.5)
    a = wallet_balance_btc * 99925056.20784412 + 0.011498875843117663 * usd
    a *= a>0
    x = usd*1.004831 - a
    return -100000000 / int(x / qty)


def short_liq_price(wallet_balance_btc, qty, price):
    usd = qty * int(-100000000 / price - 0.5)

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#!/usr/bin/env python3


maint_lookup_table = [
    (   50000,  0.4,       0),
    (  250000,  0.5,      50),
    ( 1000000,  1.0,    1300),
    ( 5000000,  2.5,   16300),
    (10000000,  5.0,  141300),
    (20000000, 10.0,  641300),