SharePoint 2019 On-Premises facing an issue with Page Loading (rendering)

Question

My SharePoint pages are having an error that it couldn't load the page data. When I am updating the details of documents in a library the list form is not updating instantly, After waiting for a minute it is showing the updated list. Even settings changed it need a minute to get updated in the page. URL is not changing by click.
Due to this I need to wait for a minute time for every single operation in SharePoint pages.

Answer 1

Hi @Namadi Rakesh ,
May I know if it's just slow data loading or if there is a specific error message? If there is an error message, please provide it. Because the cause of the problem is uncertain, let's first do some operations to narrow down the scope of the problem:
1, is it that all members have this situation, or is it only a few users?
2, Switch the browser to private mode to try.
3, You could also try a variety of browsers in your environment.
4, If it is the slowly of local speed, it is recommended that you monitor all server roles, the network, whether the CPU is overloaded, the allocated memory resources are too low, or just the underlying storage system is slow.
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Answer 2

Hi @Namadi Rakesh ,
Let's follow the steps to narrow down the scope of the problem:

1. Do all sites have this problem?
2. Does your SharePoint configuration meet the minimum requirements?
3. What customizations exist on the pages? Do blank pages also load slowly?
4. If there is no problem with the above, it is recommended to use the Developer Dashboard to check whether any process consumes too much time and slows down the process.
   https://learn.microsoft.com/en-us/sharepoint/dev/spfx/use-developer-dashboard
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Answer 3

1. Yes, i have 9 application pools in my sharepoint on premises server.
   every page in these pools are getting slow in the morning itself. If i opened a site on some port in the morning it will take 60-180 seconds to load. then after it reduces to 5-20 seconds to load.
2. Hardware and software configurations are configured as mentioned in the records.
3. There is no much customisations are there. A html webpart is present and the basic graphics are on the stating pages.
4. I need to give a try with developer dashboard. There is no broken links in pages. I found some pages are getting slow using a third party tool. Those are hidden pages which are not available to use for users like in settings page, customizations page etc...