This week we talk about server and status variables relating to the performance schema and the ps_helper tool. Ear Candy is an sql_mode bug, and At the Movies is a performance_schema and ps_helper webinar.
Performance Schema Variables
MySQL 5.5 performance schema variables
MySQL 5.6 performance schema variables - many
options are auto-sized
SHOW GLOBAL VARIABLES LIKE 'performance_schema%';
This week we explain performance_schema a bit deeper. In Ear Candy, we talk about max_binlog_cache_size and At the Movies presents Max Mether of SkySQL talking about "High Availability Solutions for MySQL".
Events
DB Hangops -
every other Wednesay at noon Pacific time
Upcoming MySQL events
This week we discuss the basics of using the performance schema in MySQL 5.5 and 5.6. Ear Candy is about a temporal gotcha when using dates and times that do not exist, and At the Movies is David Stokes giving some useful for System Administrators who also are in a DBA role.
News
Continuent's Tungsten Replicator is now completely
open source
TokuDB is now open source
This week we discuss Tungsten and MySQL 5.6 replication with friend of the show, Giuseppe Maxia (aka the Data Charmer). Ear Candy is MariaDB's Cassandra storage engine, and At the Movies is Giuseppe's "MySQL 5.6 Replication – features and usability" video from Open Database Camp.
Events
DB Hangops in
May will be Wed May 8th and 22nd.
Upcoming MySQL tech tours
This week we talk to Giuseppe Maxia about MySQL Sandbox. Ear Candy is about table_open_cache, Open_tables and Opened_tables, and At the Movies features MariaDB.
MySQL Sandbox
MySQL
Sandbox
Examples:
MariaDB slave of a master:
make sandbox mysql-tarball --master
make sandbox mariadb-tarball --slaveof master-port=foo
Exporting:
./my sqldump instancename
Remote mysql sandbox deploy:
deploy remote sandboxes -m MySQLVer -l
list,of,servers
We discuss INFORMATION_SCHEMA with plenty of examples on useful queries. In this week's Ear Candy, we talk about resident versus virtual memory on Linux, and in At the Movies has a video about MongoDB.
Events
DB Hangops in
May will be Wed May 8th and 22nd noon pacific time.
Upcoming MySQL tech tours
This week, we explain the InnoDB and Memcached integration in MySQL 5.6. Ear Candy is about the nonexistent 2-step deadlock detection in MariaDB and At the Movies is Colin Charles talking about the features of MariaDB 10.
InnoDB and memcached in MySQL 5.6
memcached
official page
InnoDB integration with memcached MySQL manual
page
History of the term NoSQL
setting up the InnoDB memcached plugin in MySQL
5.6
This week, we take a lighter topic and talk about the many uses and meanings of "binary". Ear candy is a but about SET GLOBAL SQL_BIN_LOG, and At the Movies is Ariel Weisberg of VoltDB explaining sharding and elastic clustering.
Events
DBA Hangops -
an every-other-week hangout for dba's (right now it's mostly
MySQL) - The DB hangops sessions for April and May are April
10th, April 24th, May 8th and May 22nd.
Call for Papers for MySQL Connect is open! The call closes Friday, April 12th.
This week, we talk about variables with changed default values in MySQL 5.6. Ear Candy is the pt-config-diff tool and At the Movies is Tim Callaghan of Tokutek talking about Fractal Trees.
Changed Defaults in MySQL 5.6
Percona's article about default variable differences in MySQL 5.5 and MySQL 5.6
MySQL 5.6 manual page about changes to server defaults in MySQL 5.6.
This week we discuss new variables in MySQL 5.6. Ear Candy talks about a problem with XFS performance on a Linux kernel, and At the Movies discusses columnar databases.
@eRadical points out a correction to episode 130 - multiple InnoDB buffer pools were new in MySQL 5.5, not MySQL 5.6.
Events
Call for Papers for MySQL Connect is open! The call closes Friday, April 12th.