I know this is a dumish answer, but i would say get or pay for a better hosting provider with more resources as pre loading it little to nothing
Well, i’m on a semidedicated plan. It’s an e-shop with 5.000 products.
Better hosting would help.
I can give you some filters that would throttle the Preload;
– Using add_filter(‘wpoptimize_preload_delay’, ‘my_preload_delay_method’), you can override the delay between two pages, which is currently set at 500000 (1/2 a second).
– Using add_filter(‘wpo_page_cache_preload_memory_threshold’, 10485760);
That filter lets you change how much memory should be left before interrupting the preload queue (10MB by default).
– Using add_filter(‘wpo_page_cache_preload_continue_interval’, 600);
This filter enables to change the time before the preload resumes when interrupted (600s by Default).
It’d be nice to get those options within the plugin, mainly wpoptimize_preload_delay