← All changes | includes/classes/Async/CachePreloader.php +102 -7 2.2 → trunk View file →

		@@ -7,8 +7,9 @@
7	7
8	8	namespace PoweredCache\Async;
9	9
10	10	use PoweredCache\Preloader;
	11	+use function PoweredCache\Utils\detect_cpu_cores;
11	12	use function PoweredCache\Utils\is_url_cached;
12	13	use \Powered_Cache_WP_Background_Process as Powered_Cache_WP_Background_Process;
13	14
14	15	/**
		@@ -53,17 +54,24 @@
53	54	*
54	55	* @return mixed
55	56	*/
56	57	protected function task( $item ) {
	58	+ // Stop early if system load is too high
	59	+ if ( ! $this->should_continue() ) {
	60	+ \PoweredCache\Utils\log( 'Preload task aborted early due to system load' );
	61	+ return $item;
	62	+ }
	63	+
57	64	$this->settings = \PoweredCache\Utils\get_settings();
	65	+ $delay = absint( $this->settings['preload_request_interval'] ) * 1000000; // convert to microseconds
58	66
59		- \PoweredCache\Utils\log( sprintf( 'Preloading...%s', $item ) );
	67	+ \PoweredCache\Utils\log( sprintf( 'Preloading..: %s', $item ) );
60	68
61	69	if ( filter_var( $item, FILTER_VALIDATE_URL ) ) {
62	70
63	71	if ( ! is_url_cached( $item, false, $this->settings['gzip_compression'] ) ) {
64	72	Preloader::preload_request( $item );
65		- Preloader::wait();
	73	+ Preloader::wait( $delay );
66	74	}
67	75
68	76	// make the preload request by using mobile agent
69	77	if ( $this->settings['cache_mobile'] && $this->settings['cache_mobile_separate_file'] ) {
		@@ -68,14 +76,14 @@
68	76	// make the preload request by using mobile agent
69	77	if ( $this->settings['cache_mobile'] && $this->settings['cache_mobile_separate_file'] ) {
70	78	if ( ! is_url_cached( $item, true, $this->settings['gzip_compression'] ) ) {
71	79	Preloader::preload_request( $item, [ 'user-agent' => Preloader::mobile_user_agent() ] );
72		- Preloader::wait();
	80	+ Preloader::wait( $delay );
73	81	}
74	82	}
75	83	}
76	84
77		- \PoweredCache\Utils\log( sprintf( 'Preloading completed...%s', $item ) );
	85	+ \PoweredCache\Utils\log( sprintf( 'Preloaded...: %s', $item ) );
78	86
79	87	return false;
80	88	}
81	89
		@@ -91,9 +99,9 @@
91	99	}
92	100
93	101	/**
94	102	* Sometimes canceling a process is glitchy
95		- * Try to cancell all items in the queue up to $max_attempt
	103	+ * Try to cancel all items in the queue up to $max_attempt
96	104	*/
97	105	public function cancel_process() {
98	106	$max_attempt = 5;
99	107	$cancelled = 0;
		@@ -100,9 +108,9 @@
100	108	while ( ! parent::is_queue_empty() ) {
101	109	if ( $cancelled >= $max_attempt ) {
102	110	break;
103	111	}
104		- parent::cancel_process();
	112	+ parent::cancel();
105	113	$cancelled ++;
106	114	}
107	115	}
108	116
		@@ -111,10 +119,97 @@
111	119	*
112	120	* @return bool
113	121	*/
114	122	public function is_process_running() { // phpcs:ignore Generic.CodeAnalysis.UselessOverridingMethod.Found
115		- return parent::is_process_running();
	123	+ return parent::is_processing();
116	124	}
	125	+
	126	+ /**
	127	+ * Determine if the background process should continue.
	128	+ * Stops the process if server load is too high or spikes suddenly.
	129	+ *
	130	+ * @return bool
	131	+ */
	132	+ public function should_continue() {
	133	+ $should_continue = parent::should_continue();
	134	+ $halted_by_load = false;
	135	+
	136	+ $load = function_exists( 'sys_getloadavg' )
	137	+ ? sys_getloadavg()
	138	+ : [ 0.0, 0.0, 0.0 ];
	139	+
	140	+ $load_1min = isset( $load[0] ) ? (float) $load[0] : 0.0;
	141	+ $load_5min = isset( $load[1] ) ? (float) $load[1] : 0.0;
	142	+ $load_15min = isset( $load[2] ) ? (float) $load[2] : 0.0;
	143	+
	144	+ // Weighted average: gives slightly more weight to short-term load.
	145	+ $weighted_load = ( $load_1min * 0.5 + $load_5min * 0.3 + $load_15min * 0.2 );
	146	+
	147	+ // Consider a spike if 1min load is significantly higher than longer-term averages.
	148	+ $load_spike_detected = ( $load_1min > $load_5min * 2 || $load_5min > $load_15min * 2 );
	149	+
	150	+ // Fallback max load threshold
	151	+ $default_max_load = 16.0;
	152	+
	153	+ /**
	154	+ * Filter the max allowed server load before preloading pauses.
	155	+ *
	156	+ * @hook powered_cache_preloader_max_server_load
	157	+ *
	158	+ * @param {float} $default_max_load Default load threshold.
	159	+ * @param {array} $load [1min, 5min, 15min] load averages.
	160	+ *
	161	+ * @return {float} Maximum allowed server load before preloading pauses.
	162	+ * @since 3.6
	163	+ */
	164	+ $max_allowed_load = apply_filters(
	165	+ 'powered_cache_preloader_max_server_load',
	166	+ $default_max_load,
	167	+ $load
	168	+ );
	169	+
	170	+ // Allow setting a custom maximum server load threshold.
	171	+ if ( defined( 'POWERED_CACHE_PRELOADER_MAX_SERVER_LOAD' ) && is_numeric( POWERED_CACHE_PRELOADER_MAX_SERVER_LOAD ) ) {
	172	+ $max_allowed_load = (float) POWERED_CACHE_PRELOADER_MAX_SERVER_LOAD;
	173	+ }
	174	+
	175	+ if ( $should_continue && ( $weighted_load > $max_allowed_load || $load_spike_detected ) ) {
	176	+ \PoweredCache\Utils\log(
	177	+ sprintf(
	178	+ 'Preload paused: server load too high or spike detected (1min: %.2f, 5min: %.2f, 15min: %.2f, weighted: %.2f, threshold: %.2f)',
	179	+ $load_1min,
	180	+ $load_5min,
	181	+ $load_15min,
	182	+ $weighted_load,
	183	+ $max_allowed_load
	184	+ )
	185	+ );
	186	+ $should_continue = false;
	187	+ $halted_by_load = true;
	188	+ }
	189	+
	190	+ /**
	191	+ * Allow complete control over continuation logic.
	192	+ *
	193	+ * @hook powered_cache_preloader_should_continue
	194	+ *
	195	+ * @param bool $should_continue Whether to continue processing.
	196	+ * @param bool $halted_by_load True if we halted due to load.
	197	+ * @param array $load [1min, 5min, 15min] load averages.
	198	+ * @param float $max_allowed_load Final load limit used for decision.
	199	+ *
	200	+ * @return bool Whether to continue processing.
	201	+ * @since 3.6
	202	+ */
	203	+ return (bool) apply_filters(
	204	+ 'powered_cache_preloader_should_continue',
	205	+ $should_continue,
	206	+ $halted_by_load,
	207	+ $load,
	208	+ $max_allowed_load
	209	+ );
	210	+ }
	211	+
117	212
118	213	/**
119	214	* Return an instance of the current class
120	215	*