| func foo() { | |
| mylist := []*thing{...} | |
| var wg sync.WaitGroup | |
| ch := make(chan *thing) | |
| for i := 0; i < maxWorkers; i++ { | |
| wg.Add(1) | |
| go worker(&wg, ch) | |
| } |
| package main | |
| import ( | |
| "context" | |
| "flag" | |
| "fmt" | |
| "log" | |
| "net/http" | |
| "os" | |
| "os/signal" |
| --- 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 |
https://coreosfest2017.sched.com/event/AWYc/best-practices-for-go-grpc-services-doug-fawley-google
Just small note for me. Hope the slide will be opened.
| CREATE TABLE accounts( | |
| id serial PRIMARY KEY, | |
| name VARCHAR(256) NOT NULL | |
| ); | |
| CREATE TABLE entries( | |
| id serial PRIMARY KEY, | |
| description VARCHAR(1024) NOT NULL, | |
| amount NUMERIC(20, 2) NOT NULL CHECK (amount > 0.0), | |
| -- Every entry is a credit to one account... |
| -- (This code was run in PostgreSQL 9.6.1) | |
| -- Demonstration of how serializable isolation for PostgreSQL, which detects possible | |
| -- interference between concurrent transactions, can produce false positives | |
| -- in psql, create the following table | |
| CREATE TABLE users( | |
| id SERIAL NOT NULL PRIMARY KEY, | |
| username VARCHAR NOT NULL | |
| ); |
| { | |
| "Name": "Elvis", | |
| "Location": "Memphis" | |
| } |
A running example of the code from:
This gist creates a working example from blog post, and a alternate example using simple worker pool.
TLDR: if you want simple and controlled concurrency use a worker pool.
| //Based on gulpfile.js from Google Web Starter Kit. | |
| //https://github.com/google/web-starter-kit | |
| 'use strict'; | |
| // Include Gulp & Tools We'll Use | |
| var gulp = require('gulp'); | |
| var $ = require('gulp-load-plugins')(); | |
| var del = require('del'); | |
| var runSequence = require('run-sequence'); | |
| var browserSync = require('browser-sync'); |
