Question Publishing posts extreamly slow - Kunena 4.0.11

I have found what is causing the excessive time it takes to submit a post but I don't know what to do to correct it.

When I submit a post with just a small paragraph of text it takes 20 seconds to complete. If you take a look at the screenshot below, you will see that 17 seconds it taken up by a 303 POST method before any data is transferred.
(I hope you can see the screenshot. If not I will re-post it or PM you the link.)

What can be causing the excessive time? Is it a Kunena problem or a problem with my hosting service? Other websites on the same hosting account don't have this problem.

I could really use some help. I've tried everything I know to do.

When I make a post, below is what Web Developer tools shows is causing the delay. Why is Kunena trying to make a 303 redirect when a post os submitted? This uses up 12 fo the 15 seconds it took to make a post to the forum.

Status: POST 303 -- mysite.com/roj/kunena -- [HTTP/1.1 303 See other 12672ms]

Can anyone tell me what I should do? I need help please.

The HTTP response status code 303 See Other is a way to redirect web applications to a new URI. In our case, to the new topic itself.

I think there is some server setting wrong, but I can't know which one.

You can try to backup everything. Then do it on a localhost. Then you can check if the issue is a server issue.

Thank you for your reply. I contacted my hosting provider InMotion's tech support to see if they could offer any help. They suggested I optimize the database with cPanel and that didn't help. They also suggested I try changing the redirect to a 301 instead of a 303. Do you think that would be appropriate in this situation and if so how would I go about doing that?

Thanks!