max_connections选项不适用于mysqld

Question

我在max_connections=2000设置了/etc/my.conf并重新启动了mysqld

但仍然qazxsw poi似乎被困在qazxsw poi

max_connections

我也尝试重新启动412帖子

mysql>  SHOW VARIABLES LIKE "max_connections";
+-----------------+-------+
| Variable_name   | Value |
+-----------------+-------+
| max_connections | 412  |
+-----------------+-------+
1 row in set (0.01 sec)

mysql>

但在我仍然从查询mysqld得到mysql> SET GLOBAL max_connections = 2000;

Answer 1

我通过更改打开文件数量的系统级别限制来解决这个问题。

检查系统级别。运行命令max_connections | 412输出将

SHOW VARIABLES LIKE "max_connections";

ulimit -a限制必须超过

core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 31168
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1012
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 4096
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

的值

要改变它，请执行以下操作

open files

并添加/编辑

max_connecitons

现在重新登录到服务器并重新启动 sudo nano /etc/security/limits.conf 并检查

 *   hard    nofile  4096
 *   soft    nofile  4096

Answer 2

1. 为服务文件创建覆盖 mysqld
2. 添加以下内容

mysql>  SHOW VARIABLES LIKE "max_connections";
+-----------------+-------+
| Variable_name   | Value |
+-----------------+-------+
| max_connections | 2000  |
+-----------------+-------+
1 row in set (0.01 sec)

mysql>

3. 重启MySQL服务器 systemctl edit mysql.service