数据库要经常定期检测维护，发现错误，自动修复，适用于INNODB,MYISAM表，脚本如下：

#! /bin/bash
# use like this : mysql_check.sh db1 db2 db3 ...
# History:
#         2007/11/14       chentao        1.1
#----------------------------------------------------------------------
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH

dbsum=$#
if [ "${dbsum}" -eq 0 ];then
        echo "Error:no database chosed"
        exit 1
fi

LogFile=/var/log/mysqlcheck.log
mysqlpath=/usr/local/mysql/bin/mysqlcheck

echo "------------------------------------------------------------------" >> $LogFile
echo "mysqlcheck start at [`date +"%Y-%m-%d %H:%M:%S"`]" >> $LogFile

for i in $*;do
        $mysqlpath $i  --check-only-changed --auto-repair --default-character-set=utf8 --silent -uroot -p123456 >> $LogFile
        echo "check db $i done" >> $LogFile
done

echo "mysqlcheck   end at [`date +"%Y-%m-%d %H:%M:%S"`]" >> $LogFile