Load depending number of workers

[friendica.git] / include / poller.php

diff --git a/include/poller.php b/include/poller.php
index b03dc84af7cb7158d36c0e06c56ac55ac09c792c..e33167c5b14667eba38e01b18a38e5da755ccbe5 100644 (file)
--- a/include/poller.php
+++ b/include/poller.php
@@ -26,6 +26,17 @@ function poller_run(&$argv, &$argc){
                unset($db_host, $db_user, $db_pass, $db_data);
        };
 
+       $maxsysload = intval(get_config('system','maxloadavg'));
+       if($maxsysload < 1)
+               $maxsysload = 50;
+       if(function_exists('sys_getloadavg')) {
+               $load = sys_getloadavg();
+               if(intval($load[0]) > $maxsysload) {
+                       logger('system: load ' . $load[0] . ' too high. poller deferred to next scheduled run.');
+                       return;
+               }
+       }
+
        if(($argc <= 1) OR ($argv[1] != "no_cron")) {
                // Run the cron job that calls all other jobs
                proc_run("php","include/cron.php");
@@ -45,17 +56,28 @@ function poller_run(&$argv, &$argc){
                sleep(4);
 
        // Checking number of workers
-       $workers = q("SELECT COUNT(*) AS `workers` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
+       if (poller_too_much_workers())
+               return;
+
+       $starttime = time();
 
-       $queues = intval(get_config("system", "worker_queues"));
+       while ($r = q("SELECT * FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `created` LIMIT 1")) {
 
-       if ($queues == 0)
-               $queues = 4;
+               if(function_exists('sys_getloadavg')) {
+                       $load = sys_getloadavg();
+                       if(intval($load[0]) > $maxsysload) {
+                               logger('system: load ' . $load[0] . ' too high. poller deferred to next scheduled run.');
+                               return;
+                       }
+               }
 
-       if ($workers[0]["workers"] >= $queues)
-               return;
+               // Quit the poller once every hour
+               if (time() > ($starttime + 3600))
+                       return;
+
+               if (poller_too_much_workers())
+                       return;
 
-       while ($r = q("SELECT * FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `created` LIMIT 1")) {
                q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d",
                        dbesc(datetime_convert()),
                        intval(getmypid()),
@@ -91,6 +113,38 @@ function poller_run(&$argv, &$argc){
 
 }
 
+function poller_too_much_workers() {
+
+       if(function_exists('sys_getloadavg')) {
+               $load = sys_getloadavg();
+
+               // To-Do
+               if ($load < 1)
+                       $queues = 10;
+               elseif ($load < 5)
+                       $queues = 4;
+               elseif ($load < 10)
+                       $queues = 2;
+               else
+                       $queues = 1;
+
+       } else {
+               $queues = intval(get_config("system", "worker_queues"));
+
+               if ($queues == 0)
+                       $queues = 4;
+       }
+
+       if (poller_active_workers() >= $queues)
+               return;
+}
+
+function poller_active_workers() {
+       $workers = q("SELECT COUNT(*) AS `workers` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
+
+       return($workers[0]["workers"]);
+}
+
 if (array_search(__file__,get_included_files())===0){
   poller_run($_SERVER["argv"],$_SERVER["argc"]);
   killme();