Workerman\Worker::writeStatisticsToStatusFile PHP Method

    protected static function writeStatisticsToStatusFile()
    {
        // For master process.
        if (self::$_masterPid === posix_getpid()) {
            $loadavg = sys_getloadavg();
            file_put_contents(self::$_statisticsFile, "---------------------------------------GLOBAL STATUS--------------------------------------------\n");
            file_put_contents(self::$_statisticsFile, 'Workerman version:' . Worker::VERSION . "          PHP version:" . PHP_VERSION . "\n", FILE_APPEND);
            file_put_contents(self::$_statisticsFile, 'start time:' . date('Y-m-d H:i:s', self::$_globalStatistics['start_timestamp']) . '   run ' . floor((time() - self::$_globalStatistics['start_timestamp']) / (24 * 60 * 60)) . ' days ' . floor((time() - self::$_globalStatistics['start_timestamp']) % (24 * 60 * 60) / (60 * 60)) . " hours   \n", FILE_APPEND);
            $load_str = 'load average: ' . implode(", ", $loadavg);
            file_put_contents(self::$_statisticsFile, str_pad($load_str, 33) . 'event-loop:' . self::getEventLoopName() . "\n", FILE_APPEND);
            file_put_contents(self::$_statisticsFile, count(self::$_pidMap) . ' workers       ' . count(self::getAllWorkerPids()) . " processes\n", FILE_APPEND);
            file_put_contents(self::$_statisticsFile, str_pad('worker_name', self::$_maxWorkerNameLength) . " exit_status     exit_count\n", FILE_APPEND);
            foreach (self::$_pidMap as $worker_id => $worker_pid_array) {
                $worker = self::$_workers[$worker_id];
                if (isset(self::$_globalStatistics['worker_exit_info'][$worker_id])) {
                    foreach (self::$_globalStatistics['worker_exit_info'][$worker_id] as $worker_exit_status => $worker_exit_count) {
                        file_put_contents(self::$_statisticsFile, str_pad($worker->name, self::$_maxWorkerNameLength) . " " . str_pad($worker_exit_status, 16) . " {$worker_exit_count}\n", FILE_APPEND);
                    }
                } else {
                    file_put_contents(self::$_statisticsFile, str_pad($worker->name, self::$_maxWorkerNameLength) . " " . str_pad(0, 16) . " 0\n", FILE_APPEND);
                }
            }
            file_put_contents(self::$_statisticsFile, "---------------------------------------PROCESS STATUS-------------------------------------------\n", FILE_APPEND);
            file_put_contents(self::$_statisticsFile, "pid\tmemory  " . str_pad('listening', self::$_maxSocketNameLength) . " " . str_pad('worker_name', self::$_maxWorkerNameLength) . " connections " . str_pad('total_request', 13) . " " . str_pad('send_fail', 9) . " " . str_pad('throw_exception', 15) . "\n", FILE_APPEND);
            chmod(self::$_statisticsFile, 0722);
            foreach (self::getAllWorkerPids() as $worker_pid) {
                posix_kill($worker_pid, SIGUSR2);
            }
            return;
        }
        // For child processes.
        /** @var Worker $worker */
        $worker = current(self::$_workers);
        $worker_status_str = posix_getpid() . "\t" . str_pad(round(memory_get_usage(true) / (1024 * 1024), 2) . "M", 7) . " " . str_pad($worker->getSocketName(), self::$_maxSocketNameLength) . " " . str_pad($worker->name === $worker->getSocketName() ? 'none' : $worker->name, self::$_maxWorkerNameLength) . " ";
        $worker_status_str .= str_pad(ConnectionInterface::$statistics['connection_count'], 11) . " " . str_pad(ConnectionInterface::$statistics['total_request'], 14) . " " . str_pad(ConnectionInterface::$statistics['send_fail'], 9) . " " . str_pad(ConnectionInterface::$statistics['throw_exception'], 15) . "\n";
        file_put_contents(self::$_statisticsFile, $worker_status_str, FILE_APPEND);
    }