I've set my setting in PHP fairly high:
memory_limit: 256M
max_execution_time: 999
max_input_time:9999
post_max_size:128M
Upload_max_filesize: 128M
(Also tried adding)
max_input_vars=6000;
realpath_cache_size=256K;
realpath_cache_ttl=1800;
allow_url_fopen=Off;
I have these set in Plesk's domain level PHP settings. I've also tried with PHP 5.6.28 and 7.0.12. PHP is run as "FPM served by Apache" if that's any help.
I've got an ecommerce WordPress and anytime I want to run something as simple as deleting/importing more than 60 products/posts at once I get a gateway timeout, anything that takes more than about minute seems to timeout, it's dedicated server with an 8 core processor and 16 gigs of ram. But I've had better performance on a shared hosting package with WordPress.
I'm at a loss as to what could be the cause, or even where I should be looking to figure out the problem. Any help would be greatly appreciated.