我的my.cnf文件是这样的

innodb_data_home_dir = /usr/local/mysql/var
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /usr/local/mysql/var
innodb_buffer_pool_size = 16M
innodb_additional_mem_pool_size = 2M
innodb_log_file_size = 5M

innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50

结果启动的时候报错如下：

130904 16:26:00 [ERROR] /usr/local/mysql/libexec/mysqld: unknown variable 'innod
b_data_file_path=ibdata1:10M:autoextend'
130904 16:26:00 [ERROR] Aborting

130904 16:26:00 [Note] /usr/local/mysql/libexec/mysqld: Shutdown complete

130904 16:26:00 mysqld_safe mysqld from pid file /usr/local/mysql/var/test4.wolf
.org.pid ended

我查看得知

>show variables like 'have%';

如果 have_innodb = NO 的话，那确实是编译的时候innodb没有加载进去。

那么需要重新编译的时候 ./configure ... --with-plugins=innobase 

唉唉唉唉，只有重新编译了

[root@test4 mysql-5.1.70]# ./configure --prefix=/usr/local/mysql --enable-assembler --datadir=/mysql/data --with-client-ldflags=-all-static--with-unix-socket-path=/tmp --with-charset=utf8 --enable-thread-safe-client --with-pthread --without-debug --with-big-tables --enable-community-features --enable-profiling --enable-local-infile --with-fast-mutexes --with-plugins=partition,federated,ndbcluster,innobase,csv,blackhole,myisam,innodb_plugin

[root@test4 mysql-5.1.70]# make && strip sql/mysqld && make install

如果你编译安装 的时候编译了innnodb但是还是出现这位洋的问题，那么就这么解决

解决如下： 
/var/lib/mysql目录下，删除ibdata1、ib_logfile1、 ib_logfile0，然后重启MySql让其重建以上文件: 
mysqladmin -uroot -p shutdown 
sudo mysqld_safe & 
搞定!

本文转自陈仲阳0 51CTO博客，原文链接:http://blog.51cto.com/wolfword/1288657