cpursley

PostgreSQL is Enough

• Simplify: move code into database functions
• Just Use Postgres for Everything
• Just use Postgres
• PostgreSQL is the worlds’ best database
• Postgres is eating the database world
• Hacker News discussion

Background and Cron Jobs

githubfoam

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tcpdump -s 0 #capture entire etherner header and IP packet

tcpdump -ni tap55ec3c7f-91 ip6 #locate the ICMPv6 packets

tcpdump -s0 -n -i any -w /tmp/$(hostname)-smbtrace.pcap #if the SMB client or SMB server is a Unix host,Troubleshooting Server Message Block (SMB)

tcpdump -D #Print the list of the network interfaces available on the system and on which tcpdump can capture packet
tcpdump -X -vvv -n -i eth0

krisek

groups:
- name: node_exporter_alerts
  rules:
  - alert: Node down
    expr: up{job="monitoring-pi"} == 0
    for: 2m
    labels:
      severity: warning
    annotations:
      title: Node {{ $labels.instance }} is down

thomaspoignant

GOCMD=go
GOTEST=$(GOCMD) test
GOVET=$(GOCMD) vet
BINARY_NAME=example
VERSION?=0.0.0
SERVICE_PORT?=3000
DOCKER_REGISTRY?= #if set it should finished by /
EXPORT_RESULT?=false # for CI please set EXPORT_RESULT to true

GREEN  := $(shell tput -Txterm setaf 2)

Hakky54

Curl with Java KeyStore

Curl doesn't have support for java keystore file, so therefor the file should be converted to a PEM format. It consists of the following multiple steps:

1. Convert keystore to p12 file
2. Convert p12 file to pem file
3. Run curl command with pem files

One way TLS/SSL/Authentication

Convert keystore to p12 file

twpayne

package main

import (
	"bytes"
	"database/sql"
	"flag"
	"html/template"
	"strconv"
	"strings"
	"testing"

holmberd

Adjusting child processes for PHP-FPM (Nginx)

When setting these options consider the following:

• How long is your average request?
• What is the maximum number of simultaneous visitors the site(s) get?
• How much memory on average does each child process consume?

Determine if the max_children limit has been reached.

• sudo grep max_children /var/log/php?.?-fpm.log.1 /var/log/php?.?-fpm.log

denji

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.

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname