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MySQL两种表存储结构性能比较测试过程

MySQL支持的两种主要表存储格式MyISAM,InnoDB,上个月做个项目时,先使用了InnoDB,结果速度特别慢,1秒钟只能插入10几条。后来换成MyISAM格式,一秒钟插入上万条。当时觉的这两个表的性能也差别太大了吧。后来自己推测,不应该差别这么慢,估计是写的插入语句有问题,决定做个测试:

测试环境:Redhat Linux9,4CPU,内存2G,MySQL版本为4.1.6-gamma-standard

测试程序:Python+Python-MySQL模块。

测试方案:

1、MyISAM格式分别测试,事务和不用事务两种情况:

2、InnoDB格式分别测试AutoCommit=1(不用begin transaction和用begin transaction模式),

AutoCommit=0 (不用begin transaction和用begin transaction模式)四种情况。

测试方法为插入10000条记录。为了测试不互相影响,单独建立了专用的测试表,建表语句如下:

1、MyISAM不用事务表:

CREATE TABLE `MyISAM_NT` (

`TableId` int(11) NOT NULL default '0',

`TableString` varchar(21) NOT NULL default ''

) ENGINE=MyISAM;

2、MyISAM用事务表:

CREATE TABLE `MyISAM_TS` (

`TableId` int(11) NOT NULL default '0',

`TableString` varchar(21) NOT NULL default ''

) ENGINE=MyISAM;

3、InnoDB关闭AutoCommit,不用事务:

CREATE TABLE `INNODB_NA_NB` (

`TableId` int(11) NOT NULL default '0',

`TableString` varchar(21) NOT NULL default ''

) ENGINE=InnoDB;

4、InnoDB关闭AutoCommit,用事务:

CREATE TABLE `INNODB_NA_BE` (

`TableId` int(11) NOT NULL default '0',

`TableString` varchar(21) NOT NULL default ''

) ENGINE=InnoDB;

5、InnoDB开启AutoCommit,不用事务:

CREATE TABLE `INNODB_AU_NB` (

`TableId` int(11) NOT NULL default '0',

`TableString` varchar(21) NOT NULL default ''

) ENGINE=InnoDB;

6、InnoDB开启AutoCommit,用事务:

CREATE TABLE `INNODB_AU_BE` (

`TableId` int(11) NOT NULL default '0',

`TableString` varchar(21) NOT NULL default ''

) ENGINE=InnoDB;

测试的Python脚本如下:

#!/usr/bin/env Python

'''

MyISAM,InnoDB性能比较

作者:空心菜(Invalid)

时间:2004-10-22

'''

import MySQLdb

import sys

import os

import string

import time

c = None

testtables = [("MyISAM_NT",None,0),

("MyISAM_TS",None,1),

("INNODB_NA_NB",0,0),

("INNODB_NA_BE",0,1),

("INNODB_AU_NB",1,0),

("INNODB_AU_BE",1,1)

]

def BeginTrans():

print "ExecSQL:BEGIN;"

c.execute("BEGIN;")

return

def Commit():

print "ExecSQL:COMMIT;"

c.execute("COMMIT;")

return

def AutoCommit(flag):

print "ExecSQL:Set AUTOCOMMIT = "+str(flag)

c.execute("Set AUTOCOMMIT = "+str(flag))

return

def getcount(table):

#print "ExecSQL:select count(*) from "+table

c.execute("select count(*) from "+table)

return c.fetchall()[0][0]

def AddTable (Table,TableId,TableString):

sql = "INSERT INTO "+Table+"(TableId, TableString) VALUES( "+ TableId+ ",'" + TableString +"')"

try:

c.execute(sql)

except MySQLdb.OperationalError,error:

print "AddTable Error:",error

return -1;

return c.rowcount

def main():

argv = sys.argv

if len(argv) < 2:

print 'Usage:',argv[0],' TableId TestCount \n'

sys.exit(1)

global c #mysql访问cursor

db_host = "localhost"

db_name = "demo"

db_user = "root"

db_user_passwd = ""

print "Config:[%s %s/%s %s] DB\n"%(db_host,db_user,db_user_passwd,db_name)

if len(argv) > 2:

tableid = argv

testcount = int(argv) #

for test in testtables:

#每次操作前都重写建立数据库连接

try:

mdb = MySQLdb.connect(db_host, db_user, db_user_passwd, db_name)

except MySQLDb.OperationalError,error:

print "Connect Mysql[%s %s/%s %s] DB Error:"%(db_host,db_user,db_user_passwd,db_name),error,"\n"

sys.exit(1)

else:

c = mdb.cursor()

table,autocommit,trans = test

starttime = time.time()

print table," ",time.strftime("%y-%m-%d %H:%M:%S",time.localtime())

if autocommit != None:

AutoCommit(autocommit)

if trans == 1:

BeginTrans()

for i in xrange(testcount):

tablestring = "%020d"%i

if (AddTable(table,tableid,tablestring)