Since few days, we can no more flush the cache of our platform (Admin site > development > Flushing all caches). Each time, this operation causes a fatal error like this one :
Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 67108872 bytes) in xxxx/cache/stores/file/lib.php on line 546
I've tried to raise the value of the memory_limit parameter in php.ini (up to 0 value which allowed illimited memory allocation - up to 32 GB) but each time, the operation stops and requires more and more memory
The platform is hosted on a Centos Linux Server (version 7.6.1810 - kernel version 3.10.0-957.10.1.el7.x86_64), with PHP 7.0.27 (installed with software collection tools), apache 2.4.34.
This operations worked on the near past and I don't know why it don't succeed today (an update of the kernel, of the OS, of PHP, ... I don't know ???).
In hope of your help or your advices ...
Thank you by advance.