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<title>[55871] trunk/src: Cron API: Attempt to raise the PHP memory limit for cron event processing.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/55871">55871</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/55871","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>johnbillion</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-05-30 18:46:58 +0000 (Tue, 30 May 2023)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Cron API: Attempt to raise the PHP memory limit for cron event processing.
Since cron events often consume extra memory by nature, it makes sense to give them the full amount available by default. In practice this means the memory will be increased to `WP_MAX_MEMORY_LIMIT` (which is 256MB by default) during cron event processing if the default memory limit is lower than this value.
The new `cron_memory_limit` filter can be used to adjust this value if necessary.
Note that this change will not by default affect external means of processing cron events, such as the `wp cron` command in WP-CLI, server-level crontab events, or any other cron event processing mechanism that bypasses `wp-cron.php`.
Props iandunn, thakkarhardik
Fixes <a href="https://core.trac.wordpress.org/ticket/56628">#56628</a></pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpcronphp">trunk/src/wp-cron.php</a></li>
<li><a href="#trunksrcwpincludesfunctionsphp">trunk/src/wp-includes/functions.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpcronphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-cron.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-cron.php 2023-05-30 17:43:27 UTC (rev 55870)
+++ trunk/src/wp-cron.php 2023-05-30 18:46:58 UTC (rev 55871)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -46,6 +46,9 @@
</span><span class="cx" style="display: block; padding: 0 10px"> require_once __DIR__ . '/wp-load.php';
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+// Attempt to raise the PHP memory limit for cron event processing.
+wp_raise_memory_limit( 'cron' );
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Retrieves the cron lock.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span></span></pre></div>
<a id="trunksrcwpincludesfunctionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/functions.php 2023-05-30 17:43:27 UTC (rev 55870)
+++ trunk/src/wp-includes/functions.php 2023-05-30 18:46:58 UTC (rev 55871)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -7523,7 +7523,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @since 4.6.0
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $context Optional. Context in which the function is called. Accepts either 'admin',
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * 'image', or an arbitrary other context. If an arbitrary context is passed,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * 'image', 'cron', or an arbitrary other context. If an arbitrary context is passed,
</ins><span class="cx" style="display: block; padding: 0 10px"> * the similarly arbitrary {@see '$context_memory_limit'} filter will be
</span><span class="cx" style="display: block; padding: 0 10px"> * invoked. Default 'admin'.
</span><span class="cx" style="display: block; padding: 0 10px"> * @return int|string|false The limit that was set or false on failure.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -7584,6 +7584,21 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $filtered_limit = apply_filters( 'image_memory_limit', $filtered_limit );
</span><span class="cx" style="display: block; padding: 0 10px"> break;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ case 'cron':
+ /**
+ * Filters the memory limit allocated for WP-Cron event processing.
+ *
+ * @since 6.3.0
+ *
+ * @param int|string $filtered_limit Maximum memory limit to allocate for WP-Cron.
+ * Default `WP_MAX_MEMORY_LIMIT` or the original
+ * php.ini `memory_limit`, whichever is higher.
+ * Accepts an integer (bytes), or a shorthand string
+ * notation, such as '256M'.
+ */
+ $filtered_limit = apply_filters( 'cron_memory_limit', $filtered_limit );
+ break;
+
</ins><span class="cx" style="display: block; padding: 0 10px"> default:
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Filters the memory limit allocated for an arbitrary context.
</span></span></pre>
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