Too many connections 以及設定最大連線數
阿新 • • 發佈：2021-06-13
Too many connections 要點：
ERROR 1040 (08004): Too many connectionsMYSQL必讀
解決辦法,這也是centos7下修改mysql連線數的做法：
1)臨時修改
MariaDB [(none)]> show variables like "max_connections"; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 214 | +-----------------+-------+ 1 row in set (0.00 sec) MariaDB [(none)]> set GLOBAL max_connections=1000; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> show variables like "max_connections"; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 1000 | +-----------------+-------+ 1 row in set (0.00 sec)
2)永久修改：
配置/etc/my.cnf
[mysqld]新新增一行如下引數：
max_connections=1000
重啟mariadb服務,再次檢視mariadb資料庫最大連線數,可以看到最大連線數是214,並非我們設定的1000.
MariaDB [(none)]> show variables like 'max_connections'; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 214 | +-----------------+-------+
這是由於mariadb有預設開啟檔案數限制.可以通過配置/usr/lib/systemd/system/mariadb.service來調大開啟檔案數目.MYSQL必讀
配置/usr/lib/systemd/system/mariadb.service
MYSQL必讀
[Service]新新增兩行如下引數：
LimitNOFILE=10000 LimitNPROC=10000
重新載入系統服務,並重啟mariadb服務
systemctl --system daemon-reload systemctl restart mariadb.service
再次檢視mariadb資料庫最大連線數,可以看到最大連線數已經是1000
MariaDB [(none)]> show variables like 'max_connections'; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 1000 | +-----------------+-------+