Add cache full status and interned strings usage to Opcode Cache debug information.

westonruter · gemini-code-assist[bot] · szepeviktor · westonruter · commit a282d58790c0 · 2026-02-11T10:27:49.000-08:00
Expanded the Opcode Cache debug data to include:
- 'opcode_cache_full': Indicates if the cache has reached its capacity.
- 'opcode_cache_interned_strings_usage': Displays the percentage of the interned strings buffer used, the total buffer size, and the amount of free memory.

These additions provide more comprehensive diagnostic information for troubleshooting performance issues related to PHP's OPcache.

Co-authored-by: gemini-code-assist[bot] &lt;176961590+gemini-code-assist[bot]@users.noreply.github.com&gt;
Co-authored-by: szepeviktor &lt;viktor@szepe.net&gt;
diff --git a/src/wp-admin/includes/class-wp-debug-data.php b/src/wp-admin/includes/class-wp-debug-data.php
@@ -504,6 +504,23 @@ private static function get_wp_server(): array {
 						),
 					);
 
+					$fields['opcode_cache_interned_strings_usage'] = array(
+						'label' => __( 'Opcode cache interned strings usage' ),
+						'value' => sprintf(
+							/* translators: 1: Percentage used, 2: Total memory, 3: Free memory */
+							__( '%1$s%% of %2$s (%3$s free)' ),
+							number_format_i18n( ( $opcache_status['interned_strings_usage']['used_memory'] / $opcache_status['interned_strings_usage']['buffer_size'] ) * 100, 2 ),
+							size_format( $opcache_status['interned_strings_usage']['buffer_size'] ),
+							size_format( $opcache_status['interned_strings_usage']['free_memory'] )
+						),
+						'debug' => sprintf(
+							'%s%% of %s (%s free)',
+							round( ( $opcache_status['interned_strings_usage']['used_memory'] / $opcache_status['interned_strings_usage']['buffer_size'] ) * 100, 2 ),
+							$opcache_status['interned_strings_usage']['buffer_size'],
+							$opcache_status['interned_strings_usage']['free_memory']
+						),
+					);
+
 					$fields['opcode_cache_hit_rate'] = array(
 						'label' => __( 'Opcode cache hit rate' ),
 						'value' => sprintf(
@@ -513,6 +530,12 @@ private static function get_wp_server(): array {
 						),
 						'debug' => $opcache_status['opcache_statistics']['opcache_hit_rate'],
 					);
+
+					$fields['opcode_cache_full'] = array(
+						'label' => __( 'Is the Opcode cache full?' ),
+						'value' => $opcache_status['cache_full'] ? __( 'Yes' ) : __( 'No' ),
+						'debug' => $opcache_status['cache_full'],
+					);
 				}
 			}
 		} else {
