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mysqli::stat

mysqli_stat

(PHP 5, PHP 7, PHP 8)

mysqli::stat -- mysqli_stat現在のシステム状態を取得する

説明

オブジェクト指向型

public mysqli::stat(): string|false

手続き型

mysqli_stat(mysqli $mysql): string|false

mysqli_stat() は、'mysqladmin status' コマンドが 返すのと同じ情報を返します。この中には、起動からの秒数・起動中の スレッドの数・リロード数および開かれているテーブルなどが含まれます。

パラメータ

link

手続き型のみ: mysqli_connect() あるいは mysqli_init() が返す mysqliオブジェクト。

戻り値

サーバーの状態を示す文字列を返します。エラー時には false を返します。

例1 mysqli::stat() の例

オブジェクト指向型

<?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());

手続き型

<?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));

上の例の出力は以下となります。

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

参考

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User Contributed Notes 1 note

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9
amosjohlong at hotmail dot com
8 years ago
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
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