/**
* Generate MySQL status information.
* Additionally generate MySQL status after 10 seconds delay to see the difference.
*
* @return array
* @throws Exception
*/
protected function _generateMysqlStatusData()
{
// MySQL Status
$data = array();
$importantConfig = array('Aborted_clients', 'Aborted_connects', 'Com_select', 'Connections', 'Created_tmp_disk_tables', 'Created_tmp_files', 'Created_tmp_tables', 'Handler_read_rnd_next', 'Innodb_buffer_pool_read_requests', 'Innodb_buffer_pool_write_requests', 'Innodb_log_waits', 'Innodb_log_write_requests', 'Innodb_log_writes', 'Open_files', 'Open_streams', 'Open_table_definitions', 'Open_tables', 'Opened_files', 'Opened_table_definitions', 'Opened_tables', 'Qcache_lowmem_prunes', 'Select_full_join', 'Select_full_range_join', 'Select_range', 'Select_range_check', 'Select_scan', 'Slow_queries', 'Slave_running', 'Sort_range', 'Sort_rows', 'Sort_scan', 'Table_locks_immediate', 'Table_locks_waited', 'Threads_cached', 'Threads_connected', 'Threads_created', 'Threads_running');
try {
if (!$this->_readConnection) {
throw new Exception('Cant\'t connect to DB. MySQL Status data can\'t be collected.');
}
$variables = $this->_readConnection->fetchPairs('SHOW GLOBAL STATUS');
$this->_log(null, '10 seconds wait time to collect MySQL status data:');
for ($i = 1; $i <= 10; $i++) {
$this->_log(null, $i . '...');
sleep(1);
}
$variablesAfter10Sec = $this->_readConnection->fetchPairs('SHOW GLOBAL STATUS');
if ($variables && $variablesAfter10Sec) {
foreach ($variables as $name => $value) {
if (!in_array($name, $importantConfig)) {
continue;
}
$valueAfter10Sec = 'n/a';
if (isset($variablesAfter10Sec[$name])) {
$difference = '';
if (is_numeric($variablesAfter10Sec[$name])) {
$difference = $variablesAfter10Sec[$name] - $value;
if ($difference != 0) {
$difference = ' (diff: ' . ($difference > 0 ? '+' : '') . $difference . ')';
} else {
$difference = '';
}
}
$valueAfter10Sec = $variablesAfter10Sec[$name] . $difference;
}
$data[] = array($name, $value, $valueAfter10Sec);
}
}
unset($variables, $variablesAfter10Sec);
} catch (Exception $e) {
$this->_log($e);
}
$systemReport = array();
$systemReport['MySQL Status'] = array('header' => array('Variable', 'Value', 'Value after 10 sec'), 'data' => $data);
return $systemReport;
}
