AWS Linux - MySQL cnf文件在哪裏編輯數據包大小？

Question

我收到了MySQL server has gone away錯誤。我不太清楚爲什麼會發生這種情況，但在做了一些研究後，最常見的答案就是編輯cnf文件以增加數據包大小和其他設置。

問題是我找不到這個文件。它會在哪裏？

我發現/etc下my.cnf文件，但它包含所有如下：

[mysqld] 
datadir=/var/lib/mysql 
socket=/var/lib/mysql/mysql.sock 
# Disabling symbolic-links is recommended to prevent assorted security risks 
symbolic-links=0 
# Settings user and group are ignored when systemd is used. 
# If you need to run mysqld under a different user or group, 
# customize your systemd unit file for mysqld according to the 
# instructions in http://fedoraproject.org/wiki/Systemd 

[mysqld_safe] 
log-error=/var/log/mysqld.log 
pid-file=/var/run/mysqld/mysqld.pid 

謝謝

Answer 1

你可以改變最大允許的數據包大小在配置設置的變量。

只需在[mysqld]部分添加max_allowed_packet=500M即可。

[mysqld] 
datadir=/var/lib/mysql 
socket=/var/lib/mysql/mysql.sock 
# Disabling symbolic-links is recommended to prevent assorted security risks 
symbolic-links=0 
# Settings user and group are ignored when systemd is used. 
# If you need to run mysqld under a different user or group, 
# customize your systemd unit file for mysqld according to the 
# instructions in http://fedoraproject.org/wiki/Systemd 

max_allowed_packet=500M 

[mysqld_safe] 
log-error=/var/log/mysqld.log 
pid-file=/var/run/mysqld/mysqld.pid 

更新配置後需要重啓MySQL服務才能生效。

注意：變量的最大大小爲1024 MB。