奇怪我的 MySQL 很容易當掉,然後我的 http://Benjr.tw 就會直接在網頁上顯示資料庫連線錯誤,檢查 /var/log/mysql 裡面的 log 會顯示 table 錯誤.

root@benjr:~# cat /var/log/mysql.log

root@benjr:~# cat /var/log/mysql.err

root@benjr:~# cat /var/log//mysql/error.log

160323 5:24:20 [ERROR] /usr/sbin/mysqld: Table './benjr/wp_commentmeta' is marked as crashed and should be repaired

160323 5:24:20 [Warning] Checking table: './benjr/wp_commentmeta'

160323 5:24:20 [ERROR] /usr/sbin/mysqld: Table './benjr/wp_comments' is marked as crashed and should be repaired

160323 5:24:20 [Warning] Checking table: './benjr/wp_comments'

160323 5:24:20 [ERROR] /usr/sbin/mysqld: Table './benjr/wp_options' is marked as crashed and should be repaired

160323 5:24:20 [Warning] Checking table: './benjr/wp_options'

160323 5:24:20 [ERROR] /usr/sbin/mysqld: Table './benjr/wp_postmeta' is marked as crashed and should be repaired

160323 5:24:20 [Warning] Checking table: './benjr/wp_postmeta'

160323 5:24:20 [ERROR] /usr/sbin/mysqld: Table './benjr/wp_posts' is marked as crashed and should be repaired

160323 5:24:20 [Warning] Checking table: './benjr/wp_posts'

160323 5:24:20 [ERROR] /usr/sbin/mysqld: Table './benjr/wp_usermeta' is marked as crashed and should be repaired

160323 5:24:20 [Warning] Checking table: './benjr/wp_usermeta'

160323 5:24:20 [ERROR] /usr/sbin/mysqld: Table './radytobe/wp_options' is marked as crashed and should be repaired

160323 5:24:20 [Warning] Checking table: './radytobe/wp_options'

160323 5:24:20 [ERROR] /usr/sbin/mysqld: Table './radytobe/wp_postmeta' is marked as crashed and should be repaired

用下面的指令就可以修復.

root@benjr:~# initctl stop mysqld

root@benjr:~# cd /var/lib/mysql/drupal

root@benjr:~# myisamchk –r *.MYI

root@benjr:~# initctl start mysqld

整理完之後就可以,但過一段時間 MySQL 又會有錯誤產生.後來檢查到 /var/log/syslog 裡面有一段關於 MySQL 的錯誤訊息 “Upgrading MySQL tables if necessary.”.

root@benjr.tw:~# cat /var/log/syslog

Mar 23 05:24:19 benjr.tw /etc/mysql/debian-start[427]: Upgrading MySQL tables if necessary.

Mar 23 05:24:19 benjr.tw /etc/mysql/debian-start[430]: /usr/bin/mysql_upgrade: the '--basedir' option is always ignored

Mar 23 05:24:19 benjr.tw /etc/mysql/debian-start[430]: Looking for 'mysql' as: /usr/bin/mysql

Mar 23 05:24:19 benjr.tw /etc/mysql/debian-start[430]: Looking for 'mysqlcheck' as: /usr/bin/mysqlcheck

Mar 23 05:24:19 benjr.tw /etc/mysql/debian-start[430]: This installation of MySQL is already upgraded to 5.5.47, use --force if you still need to run mysql_upgrade

似乎需要下下面的指令來更新 MySQL

root@benjr.tw:/var/log# mysql_upgrade -u root -p

Enter password:

Looking for 'mysql' as: mysql

Looking for 'mysqlcheck' as: mysqlcheck

This installation of MySQL is already upgraded to 5.5.47, use --force if you still need to run mysql_upgrade

要加上 參數 force 才能使用.更新之後看起來一些怪問題都解決了,但 MYSQL 會不會再發生當掉的問題還需要在觀察一段時間.

root@benjr.tw:/var/log# mysql_upgrade --force -u root -p

Enter password:

Looking for 'mysql' as: mysql

Looking for 'mysqlcheck' as: mysqlcheck

Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/var/run/mysqld/mysqld.sock'

Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/var/run/mysqld/mysqld.sock'

benjr.wp_commentmeta OK

benjr.wp_comments OK

benjr.wp_links OK

benjr.wp_options OK

benjr.wp_postmeta OK

benjr.wp_posts OK

benjr.wp_term_relationships OK

benjr.wp_term_taxonomy OK

benjr.wp_termmeta OK

benjr.wp_terms OK

benjr.wp_usermeta OK

benjr.wp_users OK

benjr.wp_wp_rp_tags OK

benjr.wp_commentmeta OK

benjr.wp_comments OK

benjr.wp_links OK

benjr.wp_options OK

benjr.wp_postmeta OK

benjr.wp_posts OK

benjr.wp_postviews_plus OK

benjr.wp_term_relationships OK

benjr.wp_term_taxonomy OK

benjr.wp_termmeta OK

benjr.wp_terms OK

benjr.wp_usermeta OK

benjr.wp_users OK

benjr.wp_wp_rp_tags OK

Running 'mysql_fix_privilege_tables'...

OK

root@benjr:~# initctl restart mysqld

冏,上星期還是發生過一次 MySQL 整個當掉的問題!!

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