Question

我正在尝试确定我的数据库上的连接数，我发现以下查询和网络结果都有非常不同的输出。谁能告诉我哪个数字正确显示数据库上的连接数以及如何获取有关这些连接的更多详细信息？

mysql> SELECT SUBSTRING_INDEX(host, ':', 1) AS host_short,
    ->        GROUP_CONCAT(DISTINCT USER)   AS users,
    ->        COUNT(*)
    -> FROM   information_schema.processlist
    -> GROUP  BY host_short
    -> ORDER  BY COUNT(*),
    ->           host_short;
+------------+-------------+----------+
| host_short | users       | COUNT(*) |
+------------+-------------+----------+
| localhost  | root,mailer |        7 |
+------------+-------------+----------+
1 row in set (0.01 sec)

mysql> show status like 'Conn%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Connections   | 9885  |
+---------------+-------+
1 row in set (0.00 sec)

Answer 1

我使用像bellow -

这样的查询找到了所需的结果

SELECT 
    db_name(dbid) as DBName, 
    COUNT(dbid) as ConnNo,
    loginame as Login
FROM
    sys.sysprocesses
WHERE 
    dbid > 0
GROUP BY 
    dbid, loginame
;

如何确定正确的连接数

1 个答案: