Technical Polygon

MySQL 5.6

@nippondanjimikiya (dot) okuno (at) gmail (dot) com

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table_name.MYItable_name.MYDInnoDBMySQLCluster NDBAPIPHPODBC

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MySQL 5.6!!

20132

MySQL 5.5GA12

3.234.04.15.05.15.5

MySQL

1979: MySQLBASICC

1985: Michael WideniusTCX DataKonsult

1990: SQL

1995: MySQL 1.0

SQL

Solaris

1996: 3.11Linux

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UnderstandingMySQLInternals

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ISAMMyISAM

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MySQL 5.6!!

GTID Global Transaction ID

mysqlbinlog

NIC

SQL

DB

InnoDB

FULLTEXT

.ibd

16KB4KB/8KB/16KB

START TRANSACTION READ ONLY

4GB512GB

CPU

memcached

semi-join

FROM

EXPLAINSELECTDML

JSONMySQL WorkbenchVisual Explain

ORDER BY ... LIMIT

Batched Key Access Join

Index Condition Pushdown

Multi Range Read

10248192

OpenGIS

Diagnostic Area

Performance SchemaON

MySQL 5.6http://nippondanji.blogspot.com/2012/10/mysql-56.html

MySQL 5.6

RDBMS

MySQL

I/OSQL

1. COMMIT

2.

3.

4-1. send_ok

4-2.

5.

6.

MySQL

MasterSlave

/

MasterSlaveSlaveSlave

1:N

Master+ SlaveMaster+ Slave

Master+ SlaveMaster+ SlaveMaster+ Slave

MasterSlave

Slave

MySQL 5.5

I/OSQL

1. COMMIT

2.

3.

7. send_ok

4.

5.

6-2.

6-1-1. ack

6-1-2. ack

COMMIT

HA

HA

1:1

1:N

Global Transaction ID

IDUUID:ID

095E0FF8-18AF-11E2-9E7C-5C260A2AA986:123456

ID1:N

MASTER_AUTO_POSITION = 1

Global Transaction ID

mysql> show binlog events in 'mysql-bin.000002'\G

*************************** 3. row *************************** Log_name: mysql-bin.000002 Pos: 151 Event_type: Gtid Server_id: 1End_log_pos: 199 Info: SET @@SESSION.GTID_NEXT= '095E0FF8-18AF-11E2-9E7C-5C260A2AA986:1'

Global Transaction ID

mysql> SHOW SLAVE STATUS\G*************************** 1. row *************************** Master_UUID: 095e0ff8-18af-11e2-9e7c-5c260a2aa986 Master_Info_File: /path/to/datadir/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: 095E0FF8-18AF-11E2-9E7C-5C260A2AA986:1 Executed_Gtid_Set: 095E0FF8-18AF-11E2-9E7C-5C260A2AA986:11 row in set (0.00 sec)

-

SHOW BINLOG EVENTS

mysql> change master to master_host='127.0.0.1', -> master_port=13032, -> master_user = 'rsandbox', -> master_password = 'rsandbox', -> master_log_file = 'mysql-bin.123456', -> master_log_pos = 123456;Query OK, 0 rows affected (0.00 sec)

mysql> start slave;Query OK, 0 rows affected (0.00 sec)

-

mysql> change master to master_host='127.0.0.1', -> master_port=13032, -> master_auto_position = 1;Query OK, 0 rows affected (0.03 sec)

mysql> start slave user='rsandbox' password='rsandbox';Query OK, 0 rows affected, 1 warning (0.00 sec)

mysqlfailover

MySQL WorkbenchMySQL Utilities

Python

mysqlfailover

shell> mysqlfailover --master=root:msandbox@127.0.0.1:13032 \ --slaves=root:msandbox@127.0.0.1:13033,root:msandbox@127.0.0.1:13034

MySQL Replication Failover UtilityFailover Mode = auto Next Interval = Thu Oct 18 22:42:14 2012

Master Information------------------Binary Log File Position Binlog_Do_DB Binlog_Ignore_DB mysql-bin.000006 191

Replication Health Status+------------+--------+---------+--------+------------+---------+| host | port | role | state | gtid_mode | health |+------------+--------+---------+--------+------------+---------+| 127.0.0.1 | 13032 | MASTER | UP | ON | OK || 127.0.0.1 | 13033 | SLAVE | UP | ON | OK || 127.0.0.1 | 13034 | SLAVE | UP | ON | OK |+------------+--------+---------+--------+------------+---------+

Q-quit R-refresh H-health G-GTID Lists U-UUIDs

mysqlfailover

MySQL Replication Failover UtilityFailover Mode = auto Next Interval = Thu Oct 18 22:43:31 2012

Master Information------------------Binary Log File Position Binlog_Do_DB Binlog_Ignore_DB mysql-bin.000003 621

Replication Health Status+------------+--------+---------+--------+------------+---------+| host | port | role | state | gtid_mode | health |+------------+--------+---------+--------+------------+---------+| 127.0.0.1 | 13033 | MASTER | UP | ON | OK || 127.0.0.1 | 13034 | SLAVE | UP | ON | OK |+------------+--------+---------+--------+------------+---------+

Q-quit R-refresh H-health G-GTID Lists U-UUIDs

server_id=1log_bin=mysql-bin

gtid_mode=onlog_slave_updatesdisable_gtid_unsafe_statementsmaster_info_repository=TABLErelay_log_info_repository=TABLErelay_log_recovery=1report_host=hostnamereport_port=3306

MySQL 5.6

InnoDBrelay_log_info

InnoDB

InnoDB

mysql.slave_relay_log_info

server_id=1log_bin=mysql-bin

gtid_mode=onlog_slave_updatesdisable_gtid_unsafe_statementsmaster_info_repository=TABLErelay_log_info_repository=TABLErelay_log_recovery=1report_host=hostnamereport_port=3306

CRC32

binlog_checksum=CRC32

master_verify_checksum=1

slave_sql_verify_checksum=1

InnoDB

DDL

MySQL 5.1

ALTER TABLE

ALTER

MySQL 5.1 InnoDB Plugin5.5

MySQL 5.6 New

/

.ibdinnodb_file_per_table

MySQL 5.5

MySQL 5.6FLUSH TABLES t FOR EXPORT

/

FLUSH TABLES t FOR EXPORT;

.ibd.cfg

UNLOCK TABLES;

CREATE TABLE t () ENGINE INNODB;

ALTER TABLE t DISCARD TABLESPACE;

.ibd.cfg

ALTER TABLE t IMPORT TABLESPACE;

innodb_print_all_deadlocks

InnoDB: transactions deadlock detected, dumping detailed information.121018 2:28:28*** (1) TRANSACTION:TRANSACTION 6426, ACTIVE 16 sec starting index readmysql tables in use 1, locked 1LOCK WAIT 3 lock struct(s), heap size 376, 2 row lock(s), undo log entries 1MySQL thread id 1, OS thread handle 0x7f126453c700, query id 53 localhost msandbox updatingupdate t set b='sss' where a=1*** (1) WAITING FOR THIS LOCK TO BE GRANTED:RECORD LOCKS space id 6 page no 3 n bits 72 index `PRIMARY` of table `test`.`t` trx id 6426 lock_mode X locks rec but not gap waitingRecord lock, heap no 2 PHYSICAL RECORD: n_fields 4; compact format; info bits 0 0: len 4; hex 00000001; asc ;; 1: len 6; hex 000000001917; asc ;; 2: len 7; hex 13000001890110; asc ;; 3: len 3; hex 747474; asc ttt;;

*** (2) TRANSACTION:TRANSACTION 6423, ACTIVE 65 sec starting index read

*** WE ROLL BACK TRANSACTION (2)

CPU

MySQL ConnectR/W sysbench MySQL 5.5151%

Read Only sysbench MySQL 5.5234%

http://medianetwork.oracle.com/video/player/1873154739001

kernel_mutex

START TRANACTION READ ONLY

autocommit=1SELECT

Adaptive Flushinglow water markinnodb_adaptive_flushing_lwm

innodb_max_dirty_pages_pct_lwm

I/Oinnodb_io_capacity_max

innodb_flushing_avg_loops

pager_cleaner

innodb_lru_scan_depth

innodb_flush_neighbors

memcached

MySQLInnoDBSQLmemcachedMySQLMySQLMySQL

memcachedmemcached

3306

11211

MySQL 5.6

Disk Sweep Multi Range Read (MRR)

Batched Key Access Join (BKA)

Index Condition Pushdown (ICP)

ORDER BY LIMIT

Semi-Join

FROM

MRR

MRR

MRR

ROWIDROWIDROWID

MySQL 5.5
Nested Loop Join

SELECT FROM t1 JOIN t2 ON WHERE ...

for each row in t1 matching where condition { for each row in t2 matching join and where condition { send joined row to client }}

MySQL 5.5
Block Nested Loop Join

JOIN Buffer

t1

t2

1. WHEREt1

2. t2JOIN

3. t1

Using Join Buffer...

Batched Key Access Join

JOIN Buffer

t1

t2

1. WHEREt1

2. MRRt2JOIN

4. t1

MRRScan3. ROWIDt2

Index Condition Pushdown

(col1, col2, col3)WHERE col1=1 AND col3 SHOW STATUS LIKE 'handler_read%';+-----------------------+--------+| Variable_name | Value |+-----------------------+--------+| Handler_read_first | 240 || Handler_read_key | 240 || Handler_read_last | 0 || Handler_read_next | 239 || Handler_read_prev | 0 || Handler_read_rnd | 0 || Handler_read_rnd_next | 824291 |+-----------------------+--------+7 rows in set (0.00 sec)

MySQL 5.6 - EXPLAIN

EXPLAIN SELECT COUNT(1) FROM Country WHERE Country.Code IN (SELECT City.CountryCode FROM City WHERE Name LIKE 'A%')\G*************************** 1. row *************************** id: 1 select_type: SIMPLE table: Country type: indexpossible_keys: PRIMARY key: PRIMARY key_len: 3 ref: NULL rows: 239 Extra: Using where; Using index*************************** 2. row *************************** id: 1 select_type: SIMPLE table: type: eq_refpossible_keys: key: key_len: 3 ref: world.Country.Code rows: 1 Extra: NULL

MySQL 5.6 - EXPLAIN

*************************** 3. row *************************** id: 2 select_type: MATERIALIZED table: City type: ALLpossible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 4188 Extra: Using where3 rows in set (0.00 sec)

MySQL 5.6 - SELECT

mysql> SELECT COUNT(1) FROM Country WHERE Country.Code IN (SELECT City.CountryCode FROM City WHERE Name LIKE 'A%')\G*************************** 1. row ***************************COUNT(1): 711 row in set (0.00 sec)

mysql> SHOW STATUS LIKE 'handler_read%';+-----------------------+-------+| Variable_name | Value |+-----------------------+-------+| Handler_read_first | 2 || Handler_read_key | 241 || Handler_read_last | 0 || Handler_read_next | 239 || Handler_read_prev | 0 || Handler_read_rnd | 0 || Handler_read_rnd_next | 4080 |+-----------------------+-------+7 rows in set (0.00 sec)

FROM

EXPLAIN

WHERE

MySQL 5.5

mysql> SELECT COUNT(1) FROM Country C1 JOIN (SELECT * FROM City) AS C2 ON (C1.Capital = C2.ID) WHERE C1.Name LIKE 'X%';+----------+| COUNT(1) |+----------+| 0 |+----------+1 row in set (0.00 sec)

mysql> SHOW STATUS LIKE 'handler_read%';+-----------------------+-------+| Variable_name | Value |+-----------------------+-------+| Handler_read_first | 2 || Handler_read_key | 2 || Handler_read_last | 0 || Handler_read_next | 0 || Handler_read_prev | 0 || Handler_read_rnd | 0 || Handler_read_rnd_next | 4320 |+-----------------------+-------+7 rows in set (0.00 sec)

MySQL 5.6

mysql> SELECT COUNT(1) FROM Country C1 JOIN (SELECT * FROM City) AS C2 ON (C1.Capital = C2.ID) WHERE C1.Name LIKE 'X%';+----------+| COUNT(1) |+----------+| 0 |+----------+1 row in set (0.00 sec)

mysql> SHOW STATUS LIKE 'handler_read%';+-----------------------+-------+| Variable_name | Value |+-----------------------+-------+| Handler_read_first | 1 || Handler_read_key | 1 || Handler_read_last | 0 || Handler_read_next | 0 || Handler_read_prev | 0 || Handler_read_rnd | 0 || Handler_read_rnd_next | 240 |+-----------------------+-------+7 rows in set (0.00 sec)

MySQL 5.6

InnoDB

MySQL

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