优化Mysql数据表的shell脚本_MySQL
bitsCN.com 由于公司数据库中的数据量较大,定期对公司的mysql数据库中的数据表进行优化操作(关于optimize的描述如下所示),数据库中有300多张数据表,手工去操作显然不太现实,用脚本来执行效率还是很不错的,脚本如下:
mysql手册中关于 OPTIMIZE 的描述:
OPTIMIZE [LOCAL | NO_WRITE_TO_BINLOG] TABLE tbl_name [, tbl_name] …
如果您已经删除了表的一大部分,或者如果您已经对含有可变长度行的表(含有VARCHAR, BLOB或TEXT列的表)进行了很多更改,则应使用
OPTIMIZE TABLE。被删除的记录被保持在链接清单中,后续的INSERT操作会重新使用旧的记录位置。您可以使用OPTIMIZE TABLE来重新
利用未使用的空间,并整理数据文件的碎片。
使用方法:sh optimize.sh word
[root@shellec shell]#
#!/bin/sh
time_log=/opt/optimize_time
sum=$#
if [ "$sum" -eq 0 ]
then
echo "Error: no parameter chosed"
exit 1
fi
for i in $*;do
echo "optimize database $i starting ..."
tables=$(/usr/bin/mysql $i -udevuser -pdevuser -e "show tables" | grep -v "Tables" > /opt/$i)
tablelist=$(cat /opt/$i)
echo "optimize database $i starting ................" >> $time_log
echo "$i start at $(date +[%Y/%m/%d/%H:%M:%S])" >> $time_log
for list in $tablelist
do
echo $list
/usr/bin/mysql $i -utaobao -padmin -e "optimize table $list"
done
echo "$i end at $(date +[%Y/%m/%d/%H:%M:%S])" >> $time_log
echo >> $time_log
done
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