start new:
tmux
start new with session name:
tmux new -s myname
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
-- show running queries (pre 9.2) | |
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query | |
FROM pg_stat_activity | |
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' | |
ORDER BY query_start desc; | |
-- show running queries (9.2) | |
SELECT pid, age(clock_timestamp(), query_start), usename, query | |
FROM pg_stat_activity | |
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' |
Edgar Rodrigues Sandi | |
Edgar Sandi | |
tw/@EdgarSandi | |
fb/EdgarSandi | |
G+/EdgarSandi | |
Ln/EdgarSandi | |
Oracle PL/SQL - 24h | |
Aula 1 - 17/01 |
## Pre-requisite: You have to know your last commit message from your deleted branch. | |
git reflog | |
# Search for message in the list | |
# a901eda HEAD@{18}: commit: <last commit message> | |
# Now you have two options, either checkout revision or HEAD | |
git checkout a901eda | |
# Or | |
git checkout HEAD@{18} |
#!/bin/sh | |
#http://www.thegeekstuff.com/2011/01/advanced-regular-expressions-in-grep-command-with-10-examples-%E2%80%93-part-ii/ | |
# GENERAL | |
# print lines begining with range of letters | |
grep ^[A-D] table.txt | |
# REGEX |
#!/usr/bin/env bash | |
declare -a regions=( | |
us-east-2 #US East (Ohio) | |
us-east-1 #US East (N. Virginia) | |
us-west-1 #US West (N. California) | |
us-west-2 #US West (Oregon) | |
ap-northeast-1 #Asia Pacific (Tokyo) | |
ap-northeast-2 #Asia Pacific (Seoul) | |
ap-south-1 #Asia Pacific (Mumbai) |
docker container prune