CentOS7.4 修改mariadb數據庫最大連接數
阿新 • • 發佈：2018-03-21
mariadb數據庫最大連接數 mysql最大連接數 mysql數據庫最大連接數 數據庫最大連接數 為什麽修改這個？因為我zabbix-server日誌報錯，提示connection to database 'zabbix' failed: [1040] Too many connections錯誤，mariadb正常。想到應該是mysql最大連接數問題。
1、查看默認最大連接數，默認是151
1、查看默認最大連接數，默認是151
[root@localhost zabbix]# /usr/bin/mysql -u root -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 14872 Server version: 5.5.56-MariaDB MariaDB Server Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> show variables like 'max_connections'; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 151 | +-----------------+-------+ 1 row in set (0.00 sec)
2、修改/etc/my.cnf配置文件
在[mysqld]新添加一行：
[root@localhost zabbix]# vi /etc/my.cnf max_connections=1000
重啟mariadb服務，並驗證最大連接數（沒顯示我們修改的）：
[root@localhost zabbix]# systemctl restart mariadb.service [root@localhost zabbix]# /usr/bin/mysql -u root -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 446 Server version: 5.5.56-MariaDB MariaDB Server Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> show variables like 'max_connections'; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 214 | +-----------------+-------+ 1 row in set (0.00 sec)
3、配置/usr/lib/systemd/system/mariadb.service來調大打開文件數目。
[root@localhost zabbix]# vi /usr/lib/systemd/system/mariadb.service 在[Service]新加這兩行： LimitNOFILE=10000 LimitNPROC=10000
4、重新加載系統服務，並重啟mariadb服務
[root@localhost zabbix]# systemctl --system daemon-reload [root@localhost zabbix]# systemctl restart mariadb.service
5、重新驗證下，是否為1000
MariaDB [(none)]> show variables like 'max_connections'; ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect... Connection id: 5 Current database: *** NONE *** +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 1000 | +-----------------+-------+ 1 row in set (0.00 sec)
CentOS7.4 修改mariadb數據庫最大連接數