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"Fast lane" mechanism to reserve one queue for priority processes

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This commit is contained in:
Michael Vogel 2016-07-24 11:22:44 +02:00
parent 7580c8ed11
commit 4be7e5a581
1 changed files with 18 additions and 9 deletions
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27
include/poller.php
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@ -39,7 +39,7 @@ function poller_run(&$argv, &$argc){
return;
// Checking the number of workers
if (poller_too_much_workers($entries, $queues, $maxqueues)) {
if (poller_too_much_workers($entries, $queues, $maxqueues, $active)) {
poller_kill_stale_workers();
return;
}
@ -58,7 +58,7 @@ function poller_run(&$argv, &$argc){
sleep(4);
// Checking number of workers
if (poller_too_much_workers($entries, $queues, $maxqueues))
if (poller_too_much_workers($entries, $queues, $maxqueues, $active))
return;
$cooldown = Config::get("system", "worker_cooldown", 0);
@ -78,7 +78,7 @@ function poller_run(&$argv, &$argc){
return;
// Count active workers and compare them with a maximum value that depends on the load
if (poller_too_much_workers($entries, $queues, $maxqueues))
if (poller_too_much_workers($entries, $queues, $maxqueues, $active))
return;
$argv = json_decode($r[0]["parameter"]);
@ -91,16 +91,25 @@ function poller_run(&$argv, &$argc){
/// @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);
$delay = true;
}
// Delay other processes if the system has a high load and there are many pending processes.
// The "delayed" value is a safety mechanism for the case when there are no high priority processes in the queue.
if ((($queues / $maxqueues) <= 0.5) AND (($entries > 100) AND ($delayed < 100)) AND !in_array($funcname, $priority)) {
q("UPDATE `workerqueue` SET `created` = '%s' WHERE `id` = %d",
dbesc(datetime_convert()),
intval($r[0]["id"]));
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($r[0]["id"]));
continue;
}
@ -268,7 +277,7 @@ function poller_kill_stale_workers() {
}
}
function poller_too_much_workers(&$entries, &$queues, &$maxqueues) {
function poller_too_much_workers(&$entries, &$queues, &$maxqueues, &$active) {
$entries = 0;