問題一 Table xx is marked as crashed and last (automatic?) repair failed

有開發(fā)找到我，說數(shù)據(jù)庫壞了，連不上數(shù)據(jù)庫，看了下 MySQL 的錯(cuò)誤日志，報(bào)錯(cuò)如下：

Error: Table './db_name/table_name' is marked as crashed and last (automatic?) repair failed

修復(fù)

1、先停止 MySQL：service mysqld stop

2、進(jìn)入到 MySQL 數(shù)據(jù)庫的文件存放目錄，比如 cd /data/mysql_data/xx_db

然后執(zhí)行如下命令：

myisamchk --safe-recover -f -r *.MYI

執(zhí)行完成后，為了保險(xiǎn)起見，我們要將文件的權(quán)限改回 MySQL 的運(yùn)行賬號(自行查看)，比如 mysql：

chown -R mysql:mysql .

3、啟動 MySQL：service mysqld start

4、最后，執(zhí)行再次自動修復(fù)優(yōu)化命令即可解決：

mysqlcheck --auto-repair --optimize --all-databases -p密碼

問題二 /usr/local/mysql/bin/mysqld does not exist or is not executable.

]# /data/wapage/hhzk/mserver/mysql5713/bin/mysqld_safe --defaults-file=/etc/my.cnf &

[1] 24527

]# 2020-11-23T10:36:45.803151Z mysqld_safe Logging to '/data/wapage/hhzk/mserver/mysql5713/data/qd01-tech2-rec-build001.ps.easou.com.err'.

2020-11-23T10:36:45.809116Z mysqld_safe The file /usr/local/mysql/bin/mysqld

does not exist or is not executable. Please cd to the mysql installation

directory and restart this script from there as follows:

./bin/mysqld_safe&

See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information

[1]+ Exit 1 /data/wapage/hhzk/mserver/mysql5713/bin/mysqld_safe --defaults-file=/etc/my.cnf

說明：mysqld_safe啟動腳本默認(rèn)的從/usr/local/mysql目錄中讀取另外一個(gè)啟動腳本mysqld，因?yàn)槲业陌惭b目錄為/data/wapage/hhzk/mserver/mysql5713。所以找不到相關(guān)文件。可以從兩個(gè)方面解決。

方法一：在/usr/local/mysql創(chuàng)建鏈接文件

mkdir -p /usr/local/mysql/bin

ln -s /data/wapage/hhzk/mserver/mysql5713/bin/mysqld /usr/local/mysql/bin/mysqld

方法二：將mysqld_safe中的所有/usr/local/mysql目錄改為自己實(shí)際的安裝目錄

sed -i 's#/usr/local/mysql#/data/wapage/hhzk/mserver/mysql5713#g' /data/wapage/hhzk/mserver/mysql5713/bin/mysqld_safe

總結(jié)

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