Here is an explanation of the values that appear in connection->stat() returned string. It was taken from Ai Hua's April 29, 2006 answer on http://forums.mysql.com/read.php?12,86570,86570.
Uptime--The number of seconds the MySQL server has been running.
Threads--The number of active threads (clients).
Questions--The number of questions (queries) from clients since the server was started.
Slow queries--The number of queries that have taken more than long_query_time seconds.
Opens--The number of tables the server has opened.
Flush tables--The number of flush-*, refresh, and reload commands the server has executed.
Open tables--The number of tables that currently are open.
Queries per second avg--Questions divided by Uptime
mysqli::stat
mysqli_stat
(PHP 5, PHP 7, PHP 8)
mysqli::stat -- mysqli_stat — 获取当前系统状态信息
说明
面向对象风格
过程化风格
mysqli_stat() 返回字符串，其中包含类似于“mysqladmin status”命令提供的信息。包含以秒为单位的正常运行时间、运行中的线程数、问题数、重新加载数以及打开的表数量。
返回值
描述服务器状态的字符串，发生错误则为 false。
示例
示例 #1 mysqli::stat() 示例
面向对象风格
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
printf("System status: %s\n", $mysqli->stat());过程化风格
<?php
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
printf("System status: %s\n", mysqli_stat($link));以上示例会输出：
System status: Uptime: 272 Threads: 1 Questions: 5340 Slow queries: 0 Opens: 13 Flush tables: 1 Open tables: 0 Queries per second avg: 19.632 Memory in use: 8496K Max memory used: 8560K
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amosjohlong at hotmail dot com ¶
8 years ago
