mysql优化索引,配置,及慢查询讲解

  

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mysql

显示mysql

mysql

=====在祝辞mysqladmin变量- u用户名-ppassword

======在祝辞mysqladmin exlended -stautus -u username -ppassword

/etc/my.cnf

my.cnf

sql

0.01

mysqldmpslow

mysqldmpslow --help

entertime

sql

mysqldumpslow

explain

explain

explain

index_stuname

sql

profiling

sql

CPU

 

ERROR 1040

max_xonnections

/etc/my.cnf

mysql

/etc/my.cnf文件,在[mysqld]下面添加如下内容,如设置最大连接数为1024

mysql

mysqlinteractive_time7200

1

2

3

wait_timeout

wait_timeout

/etc/my.cnf文件,在[mysqld]下面添加如下内容

MySQL Server

MyISAM

838860

/etc/my.cnf文件,在[mysqld]下面添加如下内容

MySQL Server

QC

MySQL

SQL

SQL

’Qcache

Query Cache

cache blocksSQLQuery free_blocks SELECT Query Cache Query Cache

query_cache

query_cache_type

1024 byte

0

1

2

/etc/my.cnf,

MYSQL

=Qcache_free_blocks/Qcache_total_blocks * 100%20%=(query_cache_size – Qcache_free_memory)/query_cache_size * 100%25%=Qcache_hits/(Qcache_hits

Query Cache

/etc/my.cnf文件,在[mysqld]下面添加如下内容

MySQL Server

MYSQLhost

/etc/my.cnf文件,在[mysqld]下面添加如下内容

MySQL Server

mysql

mysql

cpu

CPU

MySQL

QC

SQL

’Qcache

Query Cache

cache blocksquery_cache

query_cache_type

1024 byte

0

1

2

/etc/my.cnf,

MYSQL

mysql

 EXPLAIN 

SQL

mysql>set profiling=1; null   null

mysql优化索引,配置,及慢查询讲解