Yet another question about maxdop! Sorry!
So, I had this server (a datamart), not so many users, but a lot!! of jobs running at night pulling data from the DW to the DM.
It had maxdop: 4, and Cost threshold for parallelism in 5.
The processor is an Intel Xeon E7540 (not sure why it says 4 processors if its 6 http://cpuboss.com/cpu/Intel-Xeon-E7540 )
Anyway, I thought this configuration was completely wrong, so I changed it gradually over the next weeks to maxdop: 0 and cost threshold for parallelism in 70… Everything was running perfect, even faster, until one day users started complaining… and 2 days after that, jobs started failing, and cpu got hung at 99%.
Questions:
1- Why could be the reason that maxdop:4 would be better suited for this server?
2- I am confused, how many proc this server has?
Thanks in advance guys!