any categories with high products numbers(+10K) get very high time to load (40-50 sec).
can be checked.
as much as the category has more product , take more time.
5K product take 8sec...50K products take 45sec !
-i disable all 3rd parties module
-i copy the website for double check to AWS -> http://184.108.40.206/
-servers has enough CPU/RAM
-i checked with LUMA theme
-server side has been checked several time
*also in pagination(navigate page to page) is same point, if the category is heavy of product ,its take lot of time to load.
"we talk about un-cached page", for uncached no problem.
anyone could help
im in very bad situations.
I have also been in similar situation but products were ~3800
I had to disable Elastic cloud and also disable catalog search configuration under which they give message that, this will slow down your site. And, I also disabled Flat Catalog & Products settings.
Above might not be directly applicable for your case, but sharing how I got my site to work faster. Before that, Even saving products from Backend was taking 5 to 8 minutes!
Dear @Shailesh G
finally i found the reason,
it was Elasticsearch
i downgraded from 7 to 6 then all works well.