328 lines
9.5 KiB
PHP
328 lines
9.5 KiB
PHP
<?php
|
|
if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
|
|
$directory = dirname($_SERVER["argv"][0]);
|
|
|
|
if (substr($directory, 0, 1) != "/")
|
|
$directory = $_SERVER["PWD"]."/".$directory;
|
|
|
|
$directory = realpath($directory."/..");
|
|
|
|
chdir($directory);
|
|
}
|
|
|
|
use \Friendica\Core\Config;
|
|
use \Friendica\Core\PConfig;
|
|
|
|
require_once("boot.php");
|
|
|
|
function poller_run(&$argv, &$argc){
|
|
global $a, $db;
|
|
|
|
if(is_null($a)) {
|
|
$a = new App;
|
|
}
|
|
|
|
if(is_null($db)) {
|
|
@include(".htconfig.php");
|
|
require_once("include/dba.php");
|
|
$db = new dba($db_host, $db_user, $db_pass, $db_data);
|
|
unset($db_host, $db_user, $db_pass, $db_data);
|
|
};
|
|
|
|
if ($a->max_processes_reached())
|
|
return;
|
|
|
|
if (poller_max_connections_reached())
|
|
return;
|
|
|
|
if (App::maxload_reached())
|
|
return;
|
|
|
|
// Checking the number of workers
|
|
if (poller_too_much_workers($entries, $queues, $maxqueues, $active)) {
|
|
poller_kill_stale_workers();
|
|
return;
|
|
}
|
|
|
|
if(($argc <= 1) OR ($argv[1] != "no_cron")) {
|
|
// Run the cron job that calls all other jobs
|
|
proc_run("php","include/cron.php");
|
|
|
|
// Run the cronhooks job separately from cron for being able to use a different timing
|
|
proc_run("php","include/cronhooks.php");
|
|
|
|
// Cleaning dead processes
|
|
poller_kill_stale_workers();
|
|
} else
|
|
// Sleep four seconds before checking for running processes again to avoid having too many workers
|
|
sleep(4);
|
|
|
|
// Checking number of workers
|
|
if (poller_too_much_workers($entries, $queues, $maxqueues, $active))
|
|
return;
|
|
|
|
$cooldown = Config::get("system", "worker_cooldown", 0);
|
|
|
|
$starttime = time();
|
|
|
|
$delayed = 0;
|
|
|
|
while ($r = q("SELECT * FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00' ORDER BY `created` LIMIT 1")) {
|
|
|
|
// Constantly check the number of parallel database processes
|
|
if ($a->max_processes_reached())
|
|
return;
|
|
|
|
// Constantly check the number of available database connections to let the frontend be accessible at any time
|
|
if (poller_max_connections_reached())
|
|
return;
|
|
|
|
// Count active workers and compare them with a maximum value that depends on the load
|
|
if (poller_too_much_workers($entries, $queues, $maxqueues, $active))
|
|
return;
|
|
|
|
$argv = json_decode($r[0]["parameter"]);
|
|
|
|
$argc = count($argv);
|
|
|
|
$funcname = str_replace(".php", "", basename($argv[0]))."_run";
|
|
|
|
// Define the processes that have priority over any other process
|
|
/// @todo Better check for priority processes
|
|
$priority = array("delivery_run", "notifier_run", "pubsubpublish_run");
|
|
|
|
// Reserve a speed lane
|
|
if (($active == ($queues - 1)) AND ($maxqueues >= 2) AND !in_array($funcname, $priority)) {
|
|
logger("Delay call to '".$funcname."' to reserve a speed lane for high priority processes", LOGGER_DEBUG);
|
|
$delay = true;
|
|
}
|
|
|
|
// Delay other processes if the system has a high load and there are many pending processes.
|
|
// The "delayed" value is a safety mechanism for the case when there are no high priority processes in the queue.
|
|
if (!$delay AND (($queues / $maxqueues) <= 0.5) AND (($entries > 100) AND ($delayed < 100)) AND !in_array($funcname, $priority)) {
|
|
// Count the number of delayed processes
|
|
++$delayed;
|
|
logger("Delay call to '".$funcname."' for performance reasons (Delay ".$delayed.")", LOGGER_DEBUG);
|
|
$delay = true;
|
|
}
|
|
|
|
if ($delay) {
|
|
q("UPDATE `workerqueue` SET `created` = '%s' WHERE `id` = %d",
|
|
dbesc(datetime_convert()),
|
|
intval($r[0]["id"]));
|
|
continue;
|
|
}
|
|
|
|
// If we delivered a process that has high priority we reset the delayed counter.
|
|
// When we reached the limit we will process any entry until we reach a high priority process.
|
|
if (in_array($funcname, $priority))
|
|
$delayed = 0;
|
|
|
|
q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d AND `executed` = '0000-00-00 00:00:00'",
|
|
dbesc(datetime_convert()),
|
|
intval(getmypid()),
|
|
intval($r[0]["id"]));
|
|
|
|
// Assure that there are no tasks executed twice
|
|
$id = q("SELECT `id` FROM `workerqueue` WHERE `id` = %d AND `pid` = %d",
|
|
intval($r[0]["id"]),
|
|
intval(getmypid()));
|
|
if (!$id) {
|
|
logger("Queue item ".$r[0]["id"]." was executed multiple times - skip this execution", LOGGER_DEBUG);
|
|
continue;
|
|
}
|
|
|
|
// Check for existance and validity of the include file
|
|
$include = $argv[0];
|
|
|
|
if (!validate_include($include)) {
|
|
logger("Include file ".$argv[0]." is not valid!");
|
|
q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"]));
|
|
continue;
|
|
}
|
|
|
|
require_once($include);
|
|
|
|
if (function_exists($funcname)) {
|
|
logger("Process ".getmypid()." - ID ".$r[0]["id"].": ".$funcname." ".$r[0]["parameter"]);
|
|
$funcname($argv, $argc);
|
|
|
|
if ($cooldown > 0) {
|
|
logger("Process ".getmypid()." - ID ".$r[0]["id"].": ".$funcname." - in cooldown for ".$cooldown." seconds");
|
|
sleep($cooldown);
|
|
}
|
|
|
|
logger("Process ".getmypid()." - ID ".$r[0]["id"].": ".$funcname." - done");
|
|
|
|
q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"]));
|
|
} else
|
|
logger("Function ".$funcname." does not exist");
|
|
|
|
// Quit the poller once every hour
|
|
if (time() > ($starttime + 3600))
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief Checks if the number of database connections has reached a critical limit.
|
|
*
|
|
* @return bool Are more than 3/4 of the maximum connections used?
|
|
*/
|
|
function poller_max_connections_reached() {
|
|
|
|
// Fetch the max value from the config. This is needed when the system cannot detect the correct value by itself.
|
|
$max = get_config("system", "max_connections");
|
|
|
|
// Fetch the percentage level where the poller will get active
|
|
$maxlevel = get_config("system", "max_connections_level");
|
|
if ($maxlevel == 0)
|
|
$maxlevel = 75;
|
|
|
|
if ($max == 0) {
|
|
// the maximum number of possible user connections can be a system variable
|
|
$r = q("SHOW VARIABLES WHERE `variable_name` = 'max_user_connections'");
|
|
if ($r)
|
|
$max = $r[0]["Value"];
|
|
|
|
// Or it can be granted. This overrides the system variable
|
|
$r = q("SHOW GRANTS");
|
|
if ($r)
|
|
foreach ($r AS $grants) {
|
|
$grant = array_pop($grants);
|
|
if (stristr($grant, "GRANT USAGE ON"))
|
|
if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match))
|
|
$max = $match[1];
|
|
}
|
|
}
|
|
|
|
// If $max is set we will use the processlist to determine the current number of connections
|
|
// The processlist only shows entries of the current user
|
|
if ($max != 0) {
|
|
$r = q("SHOW PROCESSLIST");
|
|
if (!$r)
|
|
return false;
|
|
|
|
$used = count($r);
|
|
|
|
logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG);
|
|
|
|
$level = ($used / $max) * 100;
|
|
|
|
if ($level >= $maxlevel) {
|
|
logger("Maximum level (".$maxlevel."%) of user connections reached: ".$used."/".$max);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// We will now check for the system values.
|
|
// This limit could be reached although the user limits are fine.
|
|
$r = q("SHOW VARIABLES WHERE `variable_name` = 'max_connections'");
|
|
if (!$r)
|
|
return false;
|
|
|
|
$max = intval($r[0]["Value"]);
|
|
if ($max == 0)
|
|
return false;
|
|
|
|
$r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
|
|
if (!$r)
|
|
return false;
|
|
|
|
$used = intval($r[0]["Value"]);
|
|
if ($used == 0)
|
|
return false;
|
|
|
|
logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG);
|
|
|
|
$level = $used / $max * 100;
|
|
|
|
if ($level < $maxlevel)
|
|
return false;
|
|
|
|
logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief fix the queue entry if the worker process died
|
|
*
|
|
*/
|
|
function poller_kill_stale_workers() {
|
|
$r = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `executed` != '0000-00-00 00:00:00'");
|
|
|
|
if (!dbm::is_result($r)) {
|
|
// No processing here needed
|
|
return;
|
|
}
|
|
|
|
foreach($r AS $pid)
|
|
if (!posix_kill($pid["pid"], 0))
|
|
q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `pid` = 0 WHERE `pid` = %d",
|
|
intval($pid["pid"]));
|
|
else {
|
|
// Kill long running processes
|
|
$duration = (time() - strtotime($pid["executed"])) / 60;
|
|
if ($duration > 180) {
|
|
logger("Worker process ".$pid["pid"]." took more than 3 hours. It will be killed now.");
|
|
posix_kill($pid["pid"], SIGTERM);
|
|
|
|
// Question: If a process is stale: Should we remove it or should we reschedule it?
|
|
// By now we rescheduling it. It's maybe not the wisest decision?
|
|
q("UPDATE `workerqueue` SET `executed` = '0000-00-00 00:00:00', `pid` = 0 WHERE `pid` = %d",
|
|
intval($pid["pid"]));
|
|
} else
|
|
logger("Worker process ".$pid["pid"]." now runs for ".round($duration)." minutes. That's okay.", LOGGER_DEBUG);
|
|
}
|
|
}
|
|
|
|
function poller_too_much_workers(&$entries, &$queues, &$maxqueues, &$active) {
|
|
|
|
$entries = 0;
|
|
|
|
$queues = get_config("system", "worker_queues");
|
|
|
|
if ($queues == 0)
|
|
$queues = 4;
|
|
|
|
$maxqueues = $queues;
|
|
|
|
$active = poller_active_workers();
|
|
|
|
// Decrease the number of workers at higher load
|
|
$load = current_load();
|
|
if($load) {
|
|
$maxsysload = intval(get_config('system','maxloadavg'));
|
|
if($maxsysload < 1)
|
|
$maxsysload = 50;
|
|
|
|
$maxworkers = $queues;
|
|
|
|
// Some magical mathemathics to reduce the workers
|
|
$exponent = 3;
|
|
$slope = $maxworkers / pow($maxsysload, $exponent);
|
|
$queues = ceil($slope * pow(max(0, $maxsysload - $load), $exponent));
|
|
|
|
$s = q("SELECT COUNT(*) AS `total` FROM `workerqueue` WHERE `executed` = '0000-00-00 00:00:00'");
|
|
$entries = $s[0]["total"];
|
|
|
|
logger("Current load: ".$load." - maximum: ".$maxsysload." - current queues: ".$active."/".$entries." - maximum: ".$queues."/".$maxqueues, LOGGER_DEBUG);
|
|
|
|
}
|
|
|
|
return($active >= $queues);
|
|
}
|
|
|
|
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();
|
|
}
|
|
?>
|