dbnode.php

См. документацию.

<?php
IncludeModuleLangFile(__FILE__);
 
class CClusterDBNode extends CAllClusterDBNode
{
    public static function GetUpTime($node_id)
    {
        if ($node_id > 1)
        {
            ob_start();
            try
            {
                $DB = CDatabase::GetDBNodeConnection($node_id, true, false);
            }
            catch (\Bitrix\Main\DB\ConnectionException $_)
            {
                $DB = false;
            }
            ob_end_clean();
        }
        else
        {
            $DB = $GLOBALS['DB'];
        }
 
        if (is_object($DB))
        {
            $rs = $DB->Query('select extract(epoch from current_timestamp - pg_postmaster_start_time()) as UPTIME', false, '', ['fixed_connection' => true]);
            if ($ar = $rs->Fetch())
            {
                return $ar['UPTIME'];
            }
        }
 
        return false;
    }
}