notes/memos about usefull commands

OPcache_config.ini

# Enable OPcache
opcache.enable=1

# The Memoru used by OPcache, default 64MB
# 128MB can ba good for 5 to 10 websites
opcache.memory_consumption=64

# 4MB seem to be prety "low", 8MB or 16MB seem better for website with lot of same class/variables
# Quick "explanation" : if you have the string "foobar" 1000 times in your code,
# internally OPcache will store 1 immutable variable for this string and just use a pointer
# to it for the other 999 times you use it.
# So 8MB or 16MB seem to be better
opcache.interned_strings_buffer=8

# For opcache.max_accelerated_files use : find . -type f -print | grep php | wc -l
# then use the number upper.
# example the command return 6000 then i use 7963 according to PHP doc
# (Cf : http://php.net/manual/fr/opcache.configuration.php#ini.opcache.max-accelerated-files)
opcache.max_accelerated_files=7963

# Seem to be better for the performances
# nope : https://tideways.io/profiler/blog/fine-tune-your-opcache-configuration-to-avoid-caching-suprises + https://github.com/zendtech/ZendOptimizerPlus/issues/146
# opcache.fast_shutdown=1

## Performances time ! ##

# for 100% performances
# but can be (and need in case of change in php files) reset by opcache_reset()
opcache.validate_timestamps=0
opcache.revalidate_freq=0

# for better performances than default (or if opcache_reset() are disabled)
# PHP will check for changes…
opcache.validate_timestamps=1
# but only every 10 minutes, so restart PHP or use opcache_reset() to "clean" OPcache before 10 minutes
opcache.revalidate_freq=600