VPS 2GB RAM memory and Symfony 3 - Out of memory - nginx

Question

I'm trying to install a symfony 3.4 project on a Debian 8 server. I'm using Nginx as web server.
My config server :
RAM = 2 GB
Memory 20 GB
The composer install works fine (the composer update too).
I had also an angular front in the same server. Everything had works fine (npm install, ng build, ..).
But when I request any route of my API, I get an error with code 500. I can't even get the profiler.
Inside the log file of nginx, I can see this error message log message but I configured the php memory_limit = -1.
My nginx conf file :
server {
listen 80;
server_name my_server_name;
root location/of/my/front;
index index.html index.htm;
location / {
try_files $uri $uri/ /index.html;
}
}
server {
server_name my_server_name_api;
root location/of/my/api/web;
location / {
try_files $uri /app.php$is_args$args;
}
location ~ ^/(app_dev|config)\.php(/|$) {
fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
fastcgi_split_path_info ^(.+\.php)(/.*)$;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
fastcgi_param DOCUMENT_ROOT $realpath_root;
}
location ~ ^/app\.php(/|$) {
fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
fastcgi_split_path_info ^(.+\.php)(/.*)$;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
fastcgi_param DOCUMENT_ROOT $realpath_root;
internal;
}
location ~ \.php$ {
return 404;
}
error_log /var/log/nginx/project_error.log;
access_log /var/log/nginx/project_access.log;
}
Do you have any idea ?
Thanks

Answer 1

This error could be due to your PHP.ini settings file having a low limit of memory, PHP can have a set limit of memory that it's allowed to use, and typically it's not set dynamically meaning that it requires you to change it to the value that you want to use.
To do this, find the php.ini file, and find the line with memory_limit on it and then change it to:
memory_limit = -1
This will allow PHP to use as much ram as it can, this is not ideal in some situations, and often times you'll find most websites only need around 1gb of memory to run, so try:
memory_limit = 1024
Instead, you could look at other methods such as disabling profiler in Symfony if you are not intending on using it as it's the most eager component within Symfony. To do this add this snippet to your code and it will where you would like to disable profiler:
if ($this->container->has('profiler')){
$this->container->get('profiler')->disable();
}
or if you want to disable to globally you can set the global parameter within the config.
framework:
profiler:
collect: false
You can also set the memory_limit vairable via PHP by putting ini_set('memory_limit', '-1'); into your main .php file.