public function getGeneralInformation()
    {
        Piwik::checkUserHasSuperUserAccess();
        // calculate total size
        $totalSpaceUsed = 0;
        foreach ($this->metadataProvider->getAllTablesStatus() as $status) {
            $totalSpaceUsed += $status['Data_length'] + $status['Index_length'];
        }

        $siteTableStatus = $this->metadataProvider->getTableStatus('site');
        $userTableStatus = $this->metadataProvider->getTableStatus('user');

        $siteCount = $siteTableStatus['Rows'];
        $userCount = $userTableStatus['Rows'];

        return array($siteCount, $userCount, $totalSpaceUsed);
    }