if (!file_exists("boot.php") AND (sizeof($_SERVER["argv"]) != 0)) {
$directory = dirname($_SERVER["argv"][0]);
- if (substr($directory, 0, 1) != "/")
+ if (substr($directory, 0, 1) != "/") {
$directory = $_SERVER["PWD"]."/".$directory;
-
+ }
$directory = realpath($directory."/..");
chdir($directory);
load_hooks();
- if (($argc <= 1) OR ($argv[1] != "no_cron")) {
- poller_run_cron();
+ // At first check the maximum load. We shouldn't continue with a high load
+ if ($a->maxload_reached()) {
+ logger('Pre check: maximum load reached, quitting.', LOGGER_DEBUG);
+ return;
}
+ // We now start the process. This is done after the load check since this could increase the load.
$a->start_process();
+ // At first we check the number of workers and quit if there are too much of them
+ // This is done at the top to avoid that too much code is executed without a need to do so,
+ // since the poller mostly quits here.
+ if (poller_too_much_workers()) {
+ poller_kill_stale_workers();
+ logger('Pre check: Active worker limit reached, quitting.', LOGGER_DEBUG);
+ return;
+ }
+
+ // Do we have too few memory?
if ($a->min_memory_reached()) {
logger('Pre check: Memory limit reached, quitting.', LOGGER_DEBUG);
return;
}
+ // Possibly there are too much database connections
if (poller_max_connections_reached()) {
logger('Pre check: maximum connections reached, quitting.', LOGGER_DEBUG);
return;
}
- if ($a->maxload_reached()) {
- logger('Pre check: maximum load reached, quitting.', LOGGER_DEBUG);
- return;
- }
-
+ // Possibly there are too much database processes that block the system
if ($a->max_processes_reached()) {
logger('Pre check: maximum processes reached, quitting.', LOGGER_DEBUG);
return;
}
- // Checking the number of workers
- if (poller_too_much_workers()) {
- poller_kill_stale_workers();
- logger('Pre check: Active worker limit reached, quitting.', LOGGER_DEBUG);
- return;
+ // Now we start additional cron processes if we should do so
+ if (($argc <= 1) OR ($argv[1] != "no_cron")) {
+ poller_run_cron();
}
$starttime = time();
+ // We fetch the next queue entry that is about to be executed
while ($r = poller_worker_process()) {
+ // If we got that queue entry we claim it for us
if (!poller_claim_process($r[0])) {
continue;
}
- // Check free memory
- if ($a->min_memory_reached()) {
- logger('Memory limit reached, quitting.', LOGGER_DEBUG);
- return;
- }
-
+ // To avoid the quitting of multiple pollers we serialize the next check
if (!Lock::set('poller_worker')) {
logger('Cannot get a lock, retrying.', LOGGER_DEBUG);
poller_unclaim_process();
Lock::remove('poller_worker');
+ // Check free memory
+ if ($a->min_memory_reached()) {
+ logger('Memory limit reached, quitting.', LOGGER_DEBUG);
+ return;
+ }
+
+ // finally the work will be done
if (!poller_execute($r[0])) {
logger('Process execution failed, quitting.', LOGGER_DEBUG);
return;
$funcname = str_replace(".php", "", basename($argv[0]))."_run";
if (function_exists($funcname)) {
-
poller_exec_function($queue, $funcname, $argv);
dba::delete('workerqueue', array('id' => $queue["id"]));
} else {
$o = "\nDatabase Read:\n";
foreach ($a->callstack["database"] AS $func => $time) {
$time = round($time, 3);
- if ($time > 0)
+ if ($time > 0) {
$o .= $func.": ".$time."\n";
+ }
}
}
if (isset($a->callstack["database_write"])) {
$o .= "\nDatabase Write:\n";
foreach ($a->callstack["database_write"] AS $func => $time) {
$time = round($time, 3);
- if ($time > 0)
+ if ($time > 0) {
$o .= $func.": ".$time."\n";
+ }
}
}
if (isset($a->callstack["network"])) {
$o .= "\nNetwork:\n";
foreach ($a->callstack["network"] AS $func => $time) {
$time = round($time, 3);
- if ($time > 0)
+ if ($time > 0) {
$o .= $func.": ".$time."\n";
+ }
}
}
} else {
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)
+ if (dbm::is_result($r)) {
$max = $r[0]["Value"];
-
+ }
// Or it can be granted. This overrides the system variable
$r = q("SHOW GRANTS");
- if ($r)
+ if (dbm::is_result($r)) {
foreach ($r AS $grants) {
$grant = array_pop($grants);
- if (stristr($grant, "GRANT USAGE ON"))
- if (preg_match("/WITH MAX_USER_CONNECTIONS (\d*)/", $grant, $match))
+ if (stristr($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) {
$r = q("SHOW PROCESSLIST");
- if (!dbm::is_result($r))
+ if (!dbm::is_result($r)) {
return false;
-
+ }
$used = count($r);
logger("Connection usage (user values): ".$used."/".$max, LOGGER_DEBUG);
// 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)
+ if (!dbm::is_result($r)) {
return false;
-
+ }
$max = intval($r[0]["Value"]);
- if ($max == 0)
+ if ($max == 0) {
return false;
-
+ }
$r = q("SHOW STATUS WHERE `variable_name` = 'Threads_connected'");
- if (!$r)
+ if (!dbm::is_result($r)) {
return false;
-
+ }
$used = intval($r[0]["Value"]);
- if ($used == 0)
+ if ($used == 0) {
return false;
-
+ }
logger("Connection usage (system values): ".$used."/".$max, LOGGER_DEBUG);
$level = $used / $max * 100;
- if ($level < $maxlevel)
+ if ($level < $maxlevel) {
return false;
-
+ }
logger("Maximum level (".$level."%) of system connections reached: ".$used."/".$max);
return true;
}
// Kill long running processes
// Check if the priority is in a valid range
- if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE)))
+ if (!in_array($pid["priority"], array(PRIORITY_CRITICAL, PRIORITY_HIGH, PRIORITY_MEDIUM, PRIORITY_LOW, PRIORITY_NEGLIGIBLE))) {
$pid["priority"] = PRIORITY_MEDIUM;
-
+ }
// Define the maximum durations
$max_duration_defaults = array(PRIORITY_CRITICAL => 360, PRIORITY_HIGH => 10, PRIORITY_MEDIUM => 60, PRIORITY_LOW => 180, PRIORITY_NEGLIGIBLE => 360);
$max_duration = $max_duration_defaults[$pid["priority"]];
}
}
- return($active >= $queues);
+ return $active >= $queues;
}
/**
function poller_active_workers() {
$workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
- return($workers[0]["processes"]);
+ return $workers[0]["processes"];
}
/**
INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`");
// No active processes at all? Fine
- if (!dbm::is_result($r))
- return(false);
-
+ if (!dbm::is_result($r)) {
+ return false;
+ }
$priorities = array();
- foreach ($r AS $line)
+ foreach ($r AS $line) {
$priorities[] = $line["priority"];
-
+ }
// Should not happen
- if (count($priorities) == 0)
- return(false);
-
+ if (count($priorities) == 0) {
+ return false;
+ }
$highest_priority = min($priorities);
// The highest process is already the slowest one?
// Then we quit
- if ($highest_priority == PRIORITY_NEGLIGIBLE)
- return(false);
-
+ if ($highest_priority == PRIORITY_NEGLIGIBLE) {
+ return false;
+ }
$high = 0;
- foreach ($priorities AS $priority)
- if ($priority == $highest_priority)
+ foreach ($priorities AS $priority) {
+ if ($priority == $highest_priority) {
++$high;
-
+ }
+ }
logger("Highest priority: ".$highest_priority." Total processes: ".count($priorities)." Count high priority processes: ".$high, LOGGER_DEBUG);
$passing_slow = (($high/count($priorities)) > (2/3));
- if ($passing_slow)
+ if ($passing_slow) {
logger("Passing slower processes than priority ".$highest_priority, LOGGER_DEBUG);
-
- return($passing_slow);
+ }
+ return $passing_slow;
}
/**
projects / friendica.git / commitdiff