" the best way to build and ship software “ ” THE HUMAN BRAIN IS A WONDERFUL THING. IT STARTS WORKING THE MOMENT YOU ARE BORN, AND NEVER STOPS UNTIL YOU STAND UP TO SPEAK IN PUBLIC. - GEORGE JESSEL 3 #
" the best way to build and ship software 3.333 M 6.667 M 10 M 13.333 M 16.667 M 20 M 2015 What is GitHub? 5 DEVELOPERS ARE WORKING TOGETHER ON PROJECTS ON GITHUB RIGHT NOW 8 MILLION 21 MILLION
" the best way to build and ship software What is MySQL’s role at GitHub? 10 janky mysql redis elasticsearch jenkins memcached pages nginx github-fs git-daemon ernicorn gitmon slumlord SVN analytics-app unicorn nginx github-babel babeld gitauth github-fe nginx unicorn github-api nginx unicorn gpanel unicorn resqued timerd alambic-fe alambic
" the best way to build and ship software 17 The GitHub Stack WEB BACKEND DATABASES Ruby on Rails Powerful application framework. Rapid development. - Javascript UI goodness . C Powers a number of backend applications . Puppet Provisioning . MySQL Main source of truth Elasticsearch Indexes all the code, as well as issues and pull requests. / Redis Resque, cache data. / Git Obviously % /
" the best way to build and ship software 32 7 • Partition by function • Split features out • Isolate tables as a whole • App specific • Milage may vary Functional Sharding
" the best way to build and ship software “ ” GITHUB, INC., WROTE THE FIRST VERSION OF HUBOT TO AUTOMATE OUR COMPANY CHAT ROOM. HUBOT KNEW HOW TO DEPLOY THE SITE, AUTOMATE A LOT OF TASKS, AND BE A SOURCE OF FUN IN THE COMPANY. EVENTUALLY HE GREW TO BECOME A FORMIDABLE FORCE IN GITHUB. BUT HE LED A PRIVATE, MESSY LIFE. SO WE REWROTE HIM. Who is Hubot? 65
" the best way to build and ship software You are on your own 80 ➜ ~ mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.6.23 Homebrew Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
" the best way to build and ship software /mysql 88 /mysql analyze analyze a table /mysql archive start or stop archiving on a MySQL cluster /mysql backup backup a table /mysql backup-‐list list backups for a table /mysql clone clone a table to the MySQL staging environment /mysql cluster show cluster topology /mysql drop safely drops a mysql table /mysql drop-‐all drops all eligible tables /mysql drop-‐check checks if a table is safe to drop /mysql drop-‐list lists the tables that are ready to be dropped /mysql drop-‐pending lists the tables that are pending dropping /mysql dummy-‐drop drops a table from production by renaming it /mysql engine shows output of show engine innodb status on a given host /mysql explain explain a query /mysql gather gathers MySQL diagnostic information /mysql log-‐migration-‐version insert the version of a migration into production /mysql inno list queries /mysql index-‐stats Prints out index stats for the specified table /mysql kill kills queries matching supplied criteria /mysql kills shows victims of pt-‐kill on given date /mysql maintenance begin and end the maintenance of a mysql node /mysql master-‐swap returns the binlog position to start replication from on a new master /mysql mutexes prints a list of mutex events for a MySQL host /mysql nibble deletes all rows in a table /mysql nibble-‐all nibble all non nibbled migration tables /mysql panic stops the delayed replica to prevent propagation of data loss /mysql pk-‐pct shows the % of the primary key range that is used /mysql pool saves or restores the innodb buffer pool of a host 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67
" the best way to build and ship software Amen - IO waits by index 140 @client.query "SELECT object_name AS table_name,\ LOWER(index_name) as index_name,\ count_fetch AS select_count,\ count_insert AS insert_count,\ count_update AS update_count,\ count_delete AS delete_count\ FROM performance_schema.table_io_waits_summary_by_index_usage\ WHERE object_schema = 'github_production'\ AND object_name NOT REGEXP '^_.'", (err, results) => if err log 'error', err else prefix = "#{metric}.table_stats.waits" for row in results @gauge "#{prefix}.#{row.table_name}.#{row.index_name}.select.count", parseInt(row.select_count) @gauge "#{prefix}.#{row.table_name}.#{row.index_name}.insert.count", parseInt(row.insert_count) @gauge "#{prefix}.#{row.table_name}.#{row.index_name}.update.count", parseInt(row.update_count) @gauge "#{prefix}.#{row.table_name}.#{row.index_name}.delete.count", parseInt(row.delete_count) 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67
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