mysql-stat.xml

<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: ff4017b6334dae2d5353fe99df8089a828795324 Maintainer: dallas Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<refentry xml:id="function.mysql-stat" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>mysql_stat</refname>
  <refpurpose>获取当前系统状态</refpurpose>
 </refnamediv>

 <refsynopsisdiv>
  <warning>
   &mysql.alternative.note;
   <simplelist role="alternatives">
    <member><function>mysqli_stat</function></member>
    <member>
     <methodname>PDO::getAttribute</methodname>，<parameter>attribute</parameter> 为 <constant>PDO::ATTR_SERVER_INFO</constant>
    </member>
   </simplelist>
  </warning>
 </refsynopsisdiv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>string</type><methodname>mysql_stat</methodname>
   <methodparam choice="opt"><type>resource</type><parameter>link_identifier</parameter><initializer>NULL</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>mysql_stat</function> 返回当前服务器状态。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    &mysql.linkid.description;
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   返回字符串，其中包含正常运行时间、线程、查询、打开表、冲刷表和每秒查询的状态。要获得其他状态变量的完整列表，必须使用
   <literal>SHOW STATUS</literal> SQL 命令。 如果 <parameter>link_identifier</parameter> 无效，则返回 &null;。
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>mysql_stat</function> 示例</title>
    <programlisting role="php">
<![CDATA[
<?php
$link   = mysql_connect('localhost', 'mysql_user', 'mysql_password');
$status = explode('  ', mysql_stat($link));
print_r($status);
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
Array
(
    [0] => Uptime: 5380
    [1] => Threads: 2
    [2] => Questions: 1321299
    [3] => Slow queries: 0
    [4] => Opens: 26
    [5] => Flush tables: 1
    [6] => Open tables: 17
    [7] => Queries per second avg: 245.595
)
]]>
    </screen>
   </example>
  </para>
  <para>
   <example>
    <title>替代 <function>mysql_stat</function> 示例</title>
    <programlisting role="php">
<![CDATA[
<?php
$link   = mysql_connect('localhost', 'mysql_user', 'mysql_password');
$result = mysql_query('SHOW STATUS', $link);
while ($row = mysql_fetch_assoc($result)) {
    echo $row['Variable_name'] . ' = ' . $row['Value'] . "\n";
}
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
back_log = 50
basedir = /usr/local/
bdb_cache_size = 8388600
bdb_log_buffer_size = 32768
bdb_home = /var/db/mysql/
bdb_max_lock = 10000
bdb_logdir =
bdb_shared_data = OFF
bdb_tmpdir = /var/tmp/
...
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>mysql_get_server_info</function></member>
    <member><function>mysql_list_processes</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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