/**
* @param IDatabase $dbw
* @return bool|mixed
*/
public static function cacheUpdate($dbw)
{
global $wgActiveUserDays;
$dbr = wfGetDB(DB_REPLICA, 'vslow');
# Get non-bot users than did some recent action other than making accounts.
# If account creation is included, the number gets inflated ~20+ fold on enwiki.
$activeUsers = $dbr->selectField('recentchanges', 'COUNT( DISTINCT rc_user_text )', ['rc_user != 0', 'rc_bot' => 0, 'rc_log_type != ' . $dbr->addQuotes('newusers') . ' OR rc_log_type IS NULL', 'rc_timestamp >= ' . $dbr->addQuotes($dbr->timestamp(wfTimestamp(TS_UNIX) - $wgActiveUserDays * 24 * 3600))], __METHOD__);
$dbw->update('site_stats', ['ss_active_users' => intval($activeUsers)], ['ss_row_id' => 1], __METHOD__);
// Invalid cache used by parser functions
SiteStats::unload();
return $activeUsers;
}