如何编写由仪表板运行的查询以获取MySQL活动连接?
有MySQL查询,例如:
show status like 'Connections';
或
show status where `variable_name` = 'Threads_connected';
当从MySQL控制台客户端使用时可以提供预期的结果
但是,如果Grafana查询如下所示,如何使用它们:
SELECT
date_time AS "time",
interesting_data AS "measurement"
FROM test
WHERE
$__timeFilter(date_time)
ORDER BY date_time
由于没有带日期/时间戳的表,我想查询一下,我将date_time
更改为NOW():
SELECT
NOW() AS "time",
6 as "connections";
并且仪表板显示了硬编码的号码,但是如何使用真实查询获取真实的连接号码?
答案 0 :(得分:1)
查询information_schema.processlist
:
SELECT
NOW() AS "time",
count(*) AS "count"
FROM information_schema.processlist;