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Profiling

Below command would create a log.

node --prof app.js

To understand the log you would need to pass it to --prof-process.

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VSCode Download

https://code.visualstudio.com/download

Install Go extension

On VSCode, Goto Extension -> Search Go -> Install.

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# Sticky Thread Pool would help to execute your block
# by sticking to a particular executor on the pool by 
# by index.

require "concurrent"

class StickyThreadPool

	attr_accessor :pool

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#!/bin/bash
printf yyy | sudo apt-get install cmake build-essential libboost-all-dev 
git clone https://github.com/feeleep75/nheqminer.git 
cd nheqminer/nheqminer 
mkdir build 
cd build 
cmake .. 
make

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Run this command to install MG-CLI:

sudo apt-get update && wget https://minergate.com/download/deb-cli -O minergate-cli.deb && sudo dpkg -i minergate-cli.deb

start miner (4 cores for BCN) use this command:

minergate-cli -user <YOUR@EMAIL.com> -bcn 4

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Add interval to timestamp value

select (<column-name>::timestamp::date + interval '1 week') as inter from <table-name> limit 1;

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#!/usr/bin/phantomjs

// This script will load a dynamic page and gives you the content.
// Args: url -> URL to be downloaded.

var system = require('system');

if(system.args.length == 1){
  system.stderr.write("Pass URL as argument to the script");
  phantom.exit(1)

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Size of the DB

SELECT pg_size_pretty(pg_database_size('postgres'));

Size of the table with indexes

select pg_size_pretty(pg_total_relation_size('tablename'));

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HBase Commands

List of row keys.

count 'pio_event:events_1', { INTERVAL => 1 }

List tables.

list

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Screen commands

Create screen session detached and log on local file. A local file named screenlog.0 will be created on the local dir.

screen -dms -L <any-name> bash -c <command>