Default Caching ?

Zend Opcache caches PHP until you restart PHP-FPM which is probably want o you ran into ?

Using any forum addon's for caching like Redis or Memcached for Xenforo etc ? If so just restart those services too before doing upgrades from file changes.

 

Defaults for Zend Opcache for 1GB VPS

Code:

php --ri 'Zend Opcache'

Zend OPcache

Opcode Caching => Disabled
Optimization => Disabled
Startup Failed => Opcode Caching is disabled for CLI

Directive => Local Value => Master Value
opcache.enable => On => On
opcache.use_cwd => On => On
opcache.validate_timestamps => On => On
opcache.inherited_hack => On => On
opcache.dups_fix => Off => Off
opcache.revalidate_path => Off => Off
opcache.log_verbosity_level => 1 => 1
opcache.memory_consumption => 256 => 256
opcache.interned_strings_buffer => 8 => 8
opcache.max_accelerated_files => 16000 => 16000
opcache.max_wasted_percentage => 5 => 5
opcache.consistency_checks => 0 => 0
opcache.force_restart_timeout => 180 => 180
opcache.revalidate_freq => 180 => 180
opcache.file_update_protection => 2 => 2
opcache.preferred_memory_model => no value => no value
opcache.blacklist_filename => no value => no value
opcache.max_file_size => 0 => 0
opcache.protect_memory => 0 => 0
opcache.save_comments => 1 => 1
opcache.load_comments => 1 => 1
opcache.fast_shutdown => 1 => 1
opcache.optimization_level => 0xFFFFFFFF => 0xFFFFFFFF
opcache.enable_file_override => On => On
opcache.enable_cli => Off => Off
opcache.error_log => no value => no value
opcache.restrict_api => no value => no value

set in /etc/centminmod/php.d/zendopcache.ini

Code:

php --ini
Configuration File (php.ini) Path: /usr/local/lib
Loaded Configuration File:         /usr/local/lib/php.ini
Scan for additional .ini files in: /etc/centminmod/php.d
Additional .ini files parsed:      /etc/centminmod/php.d/a_customphp.ini,
/etc/centminmod/php.d/curlcainfo.ini,
/etc/centminmod/php.d/geoip.ini,
/etc/centminmod/php.d/igbinary.ini,
/etc/centminmod/php.d/imagick.ini,
/etc/centminmod/php.d/memcache.ini,
/etc/centminmod/php.d/memcached.ini,
/etc/centminmod/php.d/mongodb.ini,
/etc/centminmod/php.d/redis.ini,
/etc/centminmod/php.d/zendopcache.ini

contents of /etc/centminmod/php.d/zendopcache.ini

Code:

zend_extension=/usr/local/lib/php/extensions/no-debug-non-zts-20100525/opcache.so
;opcache.error_log=/var/log/php_opcache_error.log
opcache.enable=1
opcache.memory_consumption=256
opcache.interned_strings_buffer=8
opcache.max_wasted_percentage=5
opcache.max_accelerated_files=16000
; http://php.net/manual/en/opcache.configuration.php#ini.opcache.revalidate-freq
; defaults to zend opcache checking every 180 seconds for PHP file changes
; set to zero to check every second if you are doing alot of frequent
; php file edits/developer work
; opcache.revalidate_freq=0
opcache.revalidate_freq=180
opcache.fast_shutdown=1
opcache.enable_cli=0
opcache.save_comments=1
opcache.enable_file_override=1
opcache.validate_timestamps=1
;opcache.huge_code_pages=1

To customise own php ini settings use own custom *.ini file PHP-FPM - CentminMod.com LEMP Nginx web stack for CentOS and reference Zend Opcache ini options PHP: Runtime Configuration - Manual

Relevant settings for when new PHP file changes are detected by PHP