Disable opcache timestamp validation

7.1/rootfs/etc/php/7.1/fpm/conf.d/99-symfony.ini

@@ -4,6 +4,11 @@ opcache.memory_consumption=256
 ; maximum number of files that can be stored in the cache
 opcache.max_accelerated_files=20000
 
+; In production servers, PHP files should never change, unless a new application version is deployed.
+; However, by default OPcache checks if cached files have changed their contents since they were cached.
+; This check introduces some overhead that can be avoided as follows:
+opcache.validate_timestamps=0
+
 ; maximum memory allocated to store the results
 realpath_cache_size=4096K
 

7.2/rootfs/etc/php/7.2/fpm/conf.d/99-symfony.ini

@@ -4,6 +4,11 @@ opcache.memory_consumption=256
 ; maximum number of files that can be stored in the cache
 opcache.max_accelerated_files=20000
 
+; In production servers, PHP files should never change, unless a new application version is deployed.
+; However, by default OPcache checks if cached files have changed their contents since they were cached.
+; This check introduces some overhead that can be avoided as follows:
+opcache.validate_timestamps=0
+
 ; maximum memory allocated to store the results
 realpath_cache_size=4096K
 

7.3/rootfs/etc/php/7.3/fpm/conf.d/99-symfony.ini

@@ -4,6 +4,11 @@ opcache.memory_consumption=256
 ; maximum number of files that can be stored in the cache
 opcache.max_accelerated_files=20000
 
+; In production servers, PHP files should never change, unless a new application version is deployed.
+; However, by default OPcache checks if cached files have changed their contents since they were cached.
+; This check introduces some overhead that can be avoided as follows:
+opcache.validate_timestamps=0
+
 ; maximum memory allocated to store the results
 realpath_cache_size=4096K