debug:container & Cache Config

Awesome! Thanks for sharing it Mikhail G.

Or

$ sudo yum install php-pecl-apcu

And don't forget to restart the web server

Hey Alar

Thank you for this tip when you have Yum package manager instead of Apt!

Cheers!

Hey Abelardo,

Thank you for sharing this with others!

Cheers!

Hey Mike P.!

Ah, VERY good question & point! First, if you did install the YAML PECL extension, it wouldn't make any difference: internally, Symfony always uses its own parser (it isn't written to fallback to the PECL version if it's available). But, more importantly, YAML is ONLY parsed when the container is being built. And this happens only in 2 different scenarios:

1) During development, the container is rebuilt (and YAML is parsed) when refreshing after you've made some changes to your configuration files. So, it's not parsed on every request - only when needed.

2) On production, the container is rebuilt only ONE time, during your deploy phase, when you run the bin/console cache:warmup command. Then, your YAML files are NEVER parsed again (you could even delete them!).

So, the YAML parsing adds limited overhead during development and zero overhead during production. And even in development, I think you'd find that it is very little of your processing time (I've never benchmarked this, but I DO know that the code that takes up most of the time is PHP code that's independent of the YAML parsing).

tl;dr You can't install the PECL extension to speed things up... but you also don't need to even worry about it ;).

Cheers!

You are brilliant! Thanks

Hey @rafix,

To configure app.cache to use Redis you need to tweak the config to:

framework:
    cache:
        app: cache.adapter.redis
        default_redis_provider: "redis://localhost"

Here's some docs about RedisAdaper: http://symfony.com/doc/3.4/components/cache/adapters/redis_adapter.html

Can I pass a snc_redis config as parameter?
Unfortunately no, as far as I see from its configuration. You can check it with "bin/console config:dump framework", looks for the "cache" key.

FYI, here's related issue: https://github.com/snc/SncRedisBundle/issues/291

Cheers!

Hey Amin,

Yeah, you just need to create different cache pools. Then, Symfony will automatically register them for autowiring, see those new services in "bin/console debug:autowire" to know how to get them

Cheers!

Hey Lionel,

Well, it should not, but it relates to Windows OS probably :/ Looks like for you it's slower than filesystem cache, that's weird. Could you restart your computer and try again? I'd also recommend you to turn off your antivirus if it's possible, it may block/check requests and that's why it slows. Otherwise, I'd recommend you to try a different cache storage like Redis maybe if it's an option for you? Unfortunately, things might be tricky on Windows :/

Cheers!

Hey Dirk

On production you have to clear the cache after doing almost any change, by running bin/console cache:clear
but if you are on "dev" environment you don't have to manually run that command, Symfony is very smart at detecting when to clear the cache but sometimes you have to manually clear the "var/cache" folder, it's a rare situation but sometimes you have to do it.

Cheers!

Hey ojtouch!

You're right! For clarity, in new projects, the cache config now lives in config/packages/cache.yaml. We'll add a note to the tutorial to make sure other people don't get confused!

Thanks!

Does it mean that you only need to uncomment the "app: cache.adapter.apcu" line in cache.yaml ?
... cause, by doing all the previous setup, i got a CacheException alert telling me that APCu in not enabled

Hey Mathieu,

Sure, since you uncomment APCu cache adapter - you should have it installed and enabled so you can use it in your application. And that's great that you got a clear error message for it.

Cheers!

Hey Sarah V.

You should be able to enable APCu even for the Symfony's built-in web server but you have to install & enable it first on your computer. Probably this guide will help you: https://serverpilot.io/docs...

Cheers!

You're the best <3

Hey Abelardo L.

Thanks for the info man!

Hey Mike,

Good question. APCu and OPcache are different things, as also APCu and APC are different things as well, because APCu is a *user* cache. If we're talking about legacy projects that does not have OPcache, then installing APC will improve performance, but if your PHP version already have OPcache - you don't need neither APC nor APCu, OPcache is enought. However, APCu can be used for cache other things, but it require some configuration.

Btw, this article may be interesting for you: https://symfony.com/doc/cur...

Cheers!

Hey Luis,

Yes, agree, that would be cool, but it would be harder to maintain this code for us. And to be honest, Docker deserves a separate topic and not all our users may know and use this technology.

Cheers!

For those on Ubuntu 16.04 (or probably other Debian flavors) and using PHP 7.2, I ran the console command:

sudo apt-get install php7.2-opcache php-apcu

I then had to restart my server to get it to kick in:

./bin/console server:stop
./bin/console server:run

Hey Chris,

Thanks for sharing it! Anyway, after successful installation of new PHP extensions just do not forget to restart your web server. And btw, you also need to restart PHP-FPM if you use a real web server like Nginx or Apache along with PHP-FPM.

Cheers!

Hey Ajie62

If you managed to install APCu, maybe you just need to enable it, you have to add "extension=apcu.so" to your php.ini file (if you are on Windows I believe it should be "extension=apcu.dll", after that, restart your web server and everything should be ok.

Cheers!

Hi MolloKhan

Unfortunately, I didn't even manage to install APCu. I'm on a Macbook Air.

Oh, well, I more a linux/windows user, but I just found a post that may guide you in the right direction. Open this link: https://getgrav.org/blog/ma... and scroll down to the section "Install OPcache and APCu"

I hope it helps you. Cheers!

I've found the answer here: https://stackoverflow.com/q...

Hey Daniel,

Great! And thanks for sharing it with other Windows users!

Cheers!