Performance tuning settings for wildfly 20

[Darrell Hall]

We are looking at some connection issue under load. It looks like the undertow system by default has no limits set. I see max connections undefined. Is that right?

But the IO system would affect the web and does have limits based upon the CPU. I get the io worker max pool size and as expected it stops when the limit is reached under load.

But what about the IO Thread Count? In my case is always at 100% 16 of 16 threads used. Should this value be changed for a busy web server?

If anyone has recommended tuning settings, we would really appreciate the recommendations.

Thank you!