server_status.php

一个用PHP编写的

<?php
/* $Id: server_status.php,v 2.28 2006/01/25 08:16:40 cybot_tm Exp $ */
// vim: expandtab sw=4 ts=4 sts=4:
/**
 * displays status variables with descriptions and some hints an optmizing
 *  + reset status variables
 */
if ( ! defined( 'PMA_NO_VARIABLES_IMPORT' ) ) {
    define( 'PMA_NO_VARIABLES_IMPORT', true );
}
require_once('./libraries/common.lib.php');

/**
 * Does the common work
 */
require './libraries/server_common.inc.php';


/**
 * Displays the links
 */
require './libraries/server_links.inc.php';


/**
 * Displays the sub-page heading
 */
echo '<a name="_top"></a>' . "\n";
echo '<div id="serverstatus">' . "\n";
echo '<h2>' . "\n"
   . ($GLOBALS['cfg']['MainPageIconic']
   ? '<img class="icon" src="' . $GLOBALS['pmaThemeImage'] .
     's_status.png" width="16" height="16" alt="" />'
   : '' )
   . $strServerStatus . "\n"
   . '</h2>' . "\n";


/**
 * flush status variables if requested
 */
if ( isset( $_REQUEST['flush'] ) ) {
    $_flush_commands = array(
        'STATUS',
        'TABLES',
        'QUERY CACHE',
    );

    if ( in_array( $_REQUEST['flush'], $_flush_commands ) ) {
        PMA_DBI_query('FLUSH ' . $_REQUEST['flush'] . ';');
    }
    unset( $_flush_commands );
}


/**
 * get status from server
 */
if ( PMA_MYSQL_INT_VERSION >= 50002 ) {
    $server_status = PMA_DBI_fetch_result( 'SHOW GLOBAL STATUS', 0, 1 );
} else {
    $server_status = PMA_DBI_fetch_result( 'SHOW STATUS', 0, 1 );
}


/**
 * for some calculations we require also some server settings
 */
if ( PMA_MYSQL_INT_VERSION >= 40003 ) {
    $server_variables = PMA_DBI_fetch_result( 'SHOW GLOBAL VARIABLES', 0, 1 );
} else {
    $server_variables = PMA_DBI_fetch_result( 'SHOW VARIABLES', 0, 1 );
}


/**
 * starttime calculation
 */
$start_time = PMA_DBI_fetch_value(
    'SELECT UNIX_TIMESTAMP() - ' . $server_status['Uptime'] );


/**
 * cleanup some deprecated values
 */
$deprecated = array(
    'Com_prepare_sql' => 'Com_stmt_prepare',
    'Com_execute_sql' => 'Com_stmt_execute',
    'Com_dealloc_sql' => 'Com_stmt_close',
);

foreach ( $deprecated as $old => $new ) {
    if ( isset( $server_status[$old] )
      && isset( $server_status[$new] ) ) {
        unset( $server_status[$old] );
    }
}
unset( $deprecated );


/**
 * calculate some values
 */
// Key_buffer_fraction
if ( isset( $server_status['Key_blocks_unused'] )
  && isset( $server_variables['key_cache_block_size'] )
  && isset( $server_variables['key_buffer_size'] ) ) {
    $server_status['Key_buffer_fraction_%'] =
        100
      - $server_status['Key_blocks_unused']
      * $server_variables['key_cache_block_size']
      / $server_variables['key_buffer_size']
      * 100;
} elseif (
     isset( $server_status['Key_blocks_used'] )
  && isset( $server_variables['key_buffer_size'] ) ) {
    $server_status['Key_buffer_fraction_%'] =
        $server_status['Key_blocks_used']
      * 1024
      / $server_variables['key_buffer_size'];
}
// Threads_cache_hitrate
if ( isset( $server_status['Threads_created'] )
  && isset( $server_status['Connections'] ) ) {
    $server_status['Threads_cache_hitrate_%'] =
        100
      - $server_status['Threads_created']
      / $server_status['Connections']
      * 100;
}


/**
 * define some alerts
 */
// name => max value before alert
$alerts = array(
    // lower is better
    // variable => max value
    'Aborted_clients' => 0,
    'Aborted_connects' => 0,

    'Binlog_cache_disk_use' => 0,

    'Created_tmp_disk_tables' => 0,

    'Handler_read_rnd' => 0,
    'Handler_read_rnd_next' => 0,

    'Innodb_buffer_pool_pages_dirty' => 0,
    'Innodb_buffer_pool_reads' => 0,
    'Innodb_buffer_pool_wait_free' => 0,
    'Innodb_log_waits' => 0,
    'Innodb_row_lock_time_avg' => 10, // ms
    'Innodb_row_lock_time_max' => 50, // ms
    'Innodb_row_lock_waits' => 0,

    'Slow_queries' => 0,
    'Delayed_errors' => 0,
    'Select_full_join' => 0,
    'Select_range_check' => 0,
    'Sort_merge_passes' => 0,
    'Opened_tables' => 0,
    'Table_locks_waited' => 0,
    'Qcache_lowmem_prunes' => 0,
    'Slow_launch_threads' => 0,

    // depends on Key_read_requests
    // normaly lower then 1:0.01
    'Key_reads' => (0.01 * $server_status['Key_read_requests']),
    // depends on Key_write_requests
    // normaly nearly 1:1
    'Key_writes' => (0.9 * $server_status['Key_write_requests']),

    'Key_buffer_fraction' => 0.5,

    // alert if more than 95% of thread cache is in use
    'Threads_cached' => 0.95 * $server_variables['thread_cache_size']

    // higher is better
    // variable => min value
    //'Handler read key' => '> ',
);


/**
 * split variables in sections
 */
$allocations = array(
    // variable name => section

    'Com_'              => 'com',
    'Innodb_'           => 'innodb',
    'Ndb_'              => 'ndb',
    'Ssl_'              => 'ssl',
    'Handler_'          => 'handler',
    'Qcache_'           => 'qcache',
    'Threads_'          => 'threads',
    'Slow_launch_threads' => 'threads',

    'Binlog_cache_'     => 'binlog_cache',
    'Created_tmp_'      => 'created_tmp',
    'Key_'              => 'key',

    'Delayed_'          => 'delayed',
    'Not_flushed_delayed_rows' => 'delayed',

    'Flush_commands'    => 'query',
    'Last_query_cost'   => 'query',
    'Slow_queries'      => 'query',

    'Select_'           => 'select',
    'Sort_'             => 'sort',

    'Open_tables'       => 'table',
    'Opened_tables'     => 'table',
    'Table_locks_'      => 'table',

    'Rpl_status'        => 'repl',
    'Slave_'            => 'repl',

    'Tc_'               => 'tc',
);

$sections = array(
    // section => section name (description)
    'com'           => array( 'title' => '' ),
    'query'         => array( 'title' => '' ),
    'innodb'        => array( 'title' => 'InnoDB' ),
    'ndb'           => array( 'title' => 'NDB' ),
    'ssl'           => array( 'title' => 'SSL' ),
    'handler'       => array( 'title' => $strHandler ),
    'qcache'        => array( 'title' => $strQueryCache ),
    'threads'       => array( 'title' => $strThreads ),
    'binlog_cache'  => array( 'title' => $strBinaryLog ),
    'created_tmp'   => array( 'title' => $strTempData ),
    'delayed'       => array( 'title' => $strServerStatusDelayedInserts ),
    'key'           => array( 'title' => $strKeyCache ),
    'select'        => array( 'title' => $strJoins ),
    'repl'          => array( 'title' => $strReplication ),
    'sort'          => array( 'title' => $strSorting ),
    'table'         => array( 'title' => $strNumTables ),
    'tc'            => array( 'title' => $strTransactionCoordinator ),
);


/**
 * define some needfull links/commands
 */
// variable or section name => (name => url)
$links = array();

$links['table'][$strFlushTables]
    = $PHP_SELF . '?flush=TABLES&amp;' . PMA_generate_common_url();
$links['table'][$strShowOpenTables]
    = 'sql.php?sql_query=' . urlencode('SHOW OPEN TABLES') .
      '&amp;goto=server_status.php&amp;' . PMA_generate_common_url();

$links['repl'][$strShowSlaveHosts]
    = 'sql.php?sql_query=' . urlencode('SHOW SLAVE HOSTS') .
      '&amp;goto=server_status.php&amp;' . PMA_generate_common_url();
$links['repl'][$strShowSlaveStatus]
    = 'sql.php?sql_query=' . urlencode('SHOW SLAVE STATUS') .
      '&amp;goto=server_status.php&amp;' . PMA_generate_common_url();
$links['repl']['MySQL - ' . $strDocu]
    = $cfg['MySQLManualBase'] . '/replication.html';

$links['qcache'][$strFlushQueryCache]
    = $PHP_SELF . '?flush=' . urlencode('QUERY CACHE') . '&amp;' .
      PMA_generate_common_url();
$links['qcache']['MySQL - ' . $strDocu]
    = $cfg['MySQLManualBase'] . '/query-cache.html';

$links['threads'][$strMySQLShowProcess]
    = 'server_processlist.php?' . PMA_generate_common_url();
$links['threads']['MySQL - ' . $strDocu]
    = $cfg['MySQLManualBase'] . '/mysql-threads.html';

$links['key']['MySQL - ' . $strDocu]
    = $cfg['MySQLManualBase'] . '/myisam-key-cache.html';

$links['slow_queries']['MySQL - ' . $strDocu]
    = $cfg['MySQLManualBase'] . '/slow-query-log.html';

$links['binlog_cache']['MySQL - ' . $strDocu]
    = $cfg['MySQLManualBase'] . '/binary-log.html';

$links['Slow_queries']['MySQL - ' . $strDocu]
    = $cfg['MySQLManualBase'] . '/slow-query-log.html';

$links['innodb'][$strServerTabVariables]
    = 'server_engines.php?engine=innodb&amp;' . PMA_generate_common_url();
$links['innodb'][$strInnodbStat]
    = 'server_engines.php?engine=innodb&amp;page=status&amp;' .
      PMA_generate_common_url();
$links['innodb']['MySQL - ' . $strDocu]
    = $cfg['MySQLManualBase'] . '/innodb.html';


// sort status vars into arrays
foreach ( $server_status as $name => $value ) {
    if ( isset( $allocations[$name] ) ) {
        $sections[$allocations[$name]]['vars'][$name] = $value;
        unset( $server_status[$name] );
    } else {
        foreach ( $allocations as $filter => $section ) {
            if ( preg_match( '/^' . $filter . '/', $name )
              && isset( $server_status[$name] ) ) {
                unset( $server_status[$name] );
                $sections[$section]['vars'][$name] = $value;
            }
        }
    }
}
unset( $name, $value, $filter, $section, $allocations );

// rest
$sections['all']['vars'] =& $server_status;

$hour_factor    = 3600 / $server_status['Uptime'];

/**
 * start output
 */
?>
<div id="statuslinks">
    <a href="<?php echo
        $PHP_SELF . '?' . PMA_generate_common_url(); ?>"
       ><?php echo $strRefresh; ?></a>
    <a href="<?php echo
        $PHP_SELF . '?flush=STATUS&amp;' . PMA_generate_common_url(); ?>"
       ><?php echo $strShowStatusReset; ?></a>
    <a href="<?php echo
        $cfg['MySQLManualBase']; ?>/server-status-variables.html"
       target="documentation">MySQL - <?php echo $strDocu; ?></a>
</div>

<p>
<?php
echo sprintf( $strServerStatusUptime,
    PMA_timespanFormat( $server_status['Uptime'] ),
    PMA_localisedDate( $start_time ) ) . "\n";
?>
</p>