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Merge pull request #5249 from annando/linear-load-optional 

Makes the linear load calculation optional
This commit is contained in:
Tobias Diekershoff 2018-06-20 08:00:12 +02:00 committed by GitHub
parent 533fedf9b8 e40b247118
commit 73b365d422
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3 changed files with 30 additions and 11 deletions
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1
doc/htconfig.md
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@ -94,6 +94,7 @@ Example: To set the automatic database cleanup process add this line to your .ht
* **throttle_limit_month** - Maximum number of posts that a user can send per month with the API.
* **wall-to-wall_share** (Boolean) - Displays forwarded posts like "wall-to-wall" posts.
* **worker_cooldown** - Cooldown time after each worker function call. Default value is 0 seconds.
* **worker_linear_load** (Boolean) - Enables the linear calculation of maximum queues.
* **xrd_timeout** - Timeout for fetching the XRD links. Default value is 20 seconds.
## experimental ##

4
mod/admin.php
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@ -1029,7 +1029,7 @@ function admin_page_site_post(App $a)
$rino = ((x($_POST,'rino')) ? intval($_POST['rino']) : 0);
$check_new_version_url = ((x($_POST, 'check_new_version_url')) ? notags(trim($_POST['check_new_version_url'])) : 'none');
$worker_queues = ((x($_POST,'worker_queues')) ? intval($_POST['worker_queues']) : 4);
$worker_queues = ((x($_POST,'worker_queues')) ? intval($_POST['worker_queues']) : 10);
$worker_dont_fork = ((x($_POST,'worker_dont_fork')) ? True : False);
$worker_fastlane = ((x($_POST,'worker_fastlane')) ? True : False);
$worker_frontend = ((x($_POST,'worker_frontend')) ? True : False);
@ -1448,7 +1448,7 @@ function admin_page_site(App $a)
'$rino' => ['rino', L10n::t("RINO Encryption"), intval(Config::get('system','rino_encrypt')), L10n::t("Encryption layer between nodes."), [0 => L10n::t("Disabled"), 1 => L10n::t("Enabled")]],
'$worker_queues' => ['worker_queues', L10n::t("Maximum number of parallel workers"), Config::get('system','worker_queues'), L10n::t("On shared hosters set this to 2. On larger systems, values of 10 are great. Default value is 4.")],
'$worker_queues' => ['worker_queues', L10n::t("Maximum number of parallel workers"), Config::get('system','worker_queues'), L10n::t("On shared hosters set this to %d. On larger systems, values of %d are great. Default value is %d.", 5, 20, 10)],
'$worker_dont_fork' => ['worker_dont_fork', L10n::t("Don't use 'proc_open' with the worker"), Config::get('system','worker_dont_fork'), L10n::t("Enable this if your system doesn't allow the use of 'proc_open'. This can happen on shared hosters. If this is enabled you should increase the frequency of worker calls in your crontab.")],
'$worker_fastlane' => ['worker_fastlane', L10n::t("Enable fastlane"), Config::get('system','worker_fastlane'), L10n::t("When enabed, the fastlane mechanism starts an additional worker if processes with higher priority are blocked by processes of lower priority.")],
'$worker_frontend' => ['worker_frontend', L10n::t('Enable frontend worker'), Config::get('system','frontend_worker'), L10n::t('When enabled the Worker process is triggered when backend access is performed \x28e.g. messages being delivered\x29. On smaller sites you might want to call %s/worker on a regular basis via an external cron job. You should only enable this option if you cannot utilize cron/scheduled jobs on your server.', System::baseUrl())],

36
src/Core/Worker.php
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@ -624,16 +624,34 @@ class Worker
$load = current_load();
if ($load) {
$maxsysload = intval(Config::get("system", "maxloadavg", 50));
$tinyload = 1;
if ($load > $maxsysload) {
$queues = 0;
} elseif ($load > $tinyload) {
//Provide $queues number between 1 (below max load) and $maxqueues - 1 (above tiny load).
$range = $maxsysload - $tinyload;
$slope = 1.00 - (($load - $tinyload) / $range);
$target = $slope * ($maxqueues - 1);
$queues = intval(ceil($target));
if (Config::get('system', 'worker_linear_load', false)) {
/* The linear load calculation works fine if there is a low
* number of maximum queues and a high load base level.
* This can be present at shared hosters.
*/
$tinyload = 1;
if ($load > $maxsysload) {
$queues = 0;
} elseif ($load > $tinyload) {
//Provide $queues number between 1 (below max load) and $maxqueues - 1 (above tiny load).
$range = $maxsysload - $tinyload;
$slope = 1.00 - (($load - $tinyload) / $range);
$target = $slope * ($maxqueues - 1);
$queues = intval(ceil($target));
}
} else {
/* The exponentional load calculation respects the load behaviour
* of Linux systems with regular hardware that normally idles
* with load values near 0.
*/
$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));
}
$processlist = '';