Fatal error: Out of memory

Hi. From one day to the next, my site happened to have this error, without having updated anything or made any changes to justify it.

Fatal error: Out of memory (allocated 367001600) (tried to allocate 262144 bytes) in /var/www/html/wp-content/plugins/w3-total-cache/ObjectCache_WpObjectCache.php on line 36

Fatal error: Out of memory (allocated 367001600) (tried to allocate 262144 bytes) in /var/www/html/wp-includes/class-wp-fatal-error-handler.php on line 35

Therefore, I proceeded to do the following things:

1) In wp-config:
define( ‘WP_MEMORY_LIMIT’, ‘512M’ );
2) In php.ini:
memory_limit = 512M
max_execution_time = 3000
3) In .htaccess:
php_value memory_limit 512M

Someone in another forum suggested the following to me “Add the line ini_set(‘memory_limit’, ‘-1’); to your wp-config.php file.” and i tried too. It didn’t work, so I deleted it.

The other three things I did keep but the site keeps giving the same error.

And yes, I reset Apache after the modifications.

I don’t know what to do. Can someone help me please?

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