一个初始bash脚本列出并运行针对db的工具…

#!/bin/bash

declare -a dbs
unset opt

for each in $(echo "show databases;" | mysql -u root) ;do

        dbs+=($each)

done



echo " The system found [ ${#dbs[@]} ] databases." ;sleep 2
echo
echo "press 1 to run a check"
echo "press 2 to run an optimization"
echo "press 3 to run a repair"
echo "press 4 to run check,repair, and optimization"
echo "press q to quit"
read input

case $input in
        1) opt="-c"
        ;;
        2) opt="-o"
        ;;
        3) opt="-r"
        ;;
        4) opt="--auto-repair -c -o"
        ;;
        *) echo "Quitting Application .."; exit 7
        ;;
esac

[[ -z $opt ]] && exit 7;

echo " running option:  mysqlcheck $opt in 5 seconds  on all Dbs... "; sleep 5

for ((i=0; i<${#dbs[@]}; i++)) ;do
        echo "${dbs[$i]} : "
        mysqlcheck $opt ${dbs[$i]}  -u root
    done

我的建议是:从碎片率最高的表开始

for table in `mysql -sss -e "select concat(table_schema,".",table_name) from information_schema.tables where table_schema not in ('mysql','information_schema','performance_schema') order by data_free desc;"
do
mysql -e "OPTIMIZE TABLE $table;"
done

使用mysql客户端可以对数据库中的所有表进行优化/检查和修复。

首先，你应该得到所有的表列表，用'，'分隔:

mysql -u[USERNAME] -p[PASSWORD] -Bse 'show tables' [DB_NAME]|xargs|perl -pe 's/ /,/g'

现在，当你有所有要优化的表列表时:

mysql -u[USERNAME] -p[PASSWORD] -Bse 'optimize tables [tables list]' [DB_NAME]

如果你是直接访问数据库，那么你可以写以下查询:

OPTIMIZE TABLE table1,table2,table3,table4......;

下面的示例php脚本可以帮助您优化数据库中的所有表

<?php

dbConnect();

$alltables = mysql_query("SHOW TABLES");

while ($table = mysql_fetch_assoc($alltables))
{
   foreach ($table as $db => $tablename)
   {
       mysql_query("OPTIMIZE TABLE '".$tablename."'")
       or die(mysql_error());

   }
}

?>

用一个简单的shell脚本完成所有数据库中所有表的修复:

#!/bin/bash
mysqlcheck --all-databases
mysqlcheck --all-databases -o
mysqlcheck --all-databases --auto-repair
mysqlcheck --all-databases --analyze