Hi Mr. Gila,
I have same first 3 issues. Can you please give suggestions?
I just spent a long time replying to this and then an error occurred when I submitted my post!
I started off by saying that it's Mrs (or Ms) Gila - or Shaw to be correct. I then wrote a bit about CXPACKET waits, but I've since come across this from Paul Randall:
CXPACKET: this wait type always accrues when parallelism happens, as the control thread in a parallel operation waits until all threads have completed. However, when parallel threads are given unbalanced amounts of work to do, the threads that finish early also accrue this wait type, leading to it maybe becoming the most prevalent. So this one could be benign, as the workload has lots of good parallelism, but could be malignant if there’s unwanted parallelism or problems causing skewed distribution of work among parallel threads.
You can affect parallelism through the use of Max Degreee of Parallelism (MAXDOP) and Cost Threshold for Parallelism, BUT, I would strongly advise against changing those settings on a Production server with testing in a Test environment first.