diff --git a/base/conf.d/50_overrides.ini b/base/conf.d/50_overrides.ini
index 1f9aecb..2a3ccc6 100644
--- a/base/conf.d/50_overrides.ini
+++ b/base/conf.d/50_overrides.ini
@@ -10,5 +10,8 @@ upload_max_filesize = 20M
 # Increase max_accelerated_files to better match Drupal.
 opcache.max_accelerated_files = 30000
 
+# Increase the amount of memory used for interned strings.
+opcache.interned_strings_buffer=64
+
 # Increase maximum length of logs.
-log_errors_max_len = ${PHP_LOG_LIMIT}
\ No newline at end of file
+log_errors_max_len = ${PHP_LOG_LIMIT}
diff --git a/fpm/conf.d/50_fpm.ini b/fpm/conf.d/50_fpm.ini
index 07a11ea..931916b 100644
--- a/fpm/conf.d/50_fpm.ini
+++ b/fpm/conf.d/50_fpm.ini
@@ -3,3 +3,5 @@ short_open_tag = Off
 session.auto_start = Off
 max_execution_time = 300
 fastcgi.logging = Off
+# Files never change in production
+opcache.validate_timestamps=0