0 - 1 of 1 tags for Viewpoint Basic Terms

Hi Guys,
 
I wish to learn meaning of few basic terminlogies used in Teradata Viewpoint.
Below are the words for which I need information:
/*TERMS IN QUERY MONITOR:*/
CPU USE ; CPU ; CPU SKEW; IMPACT CPU
I/O ; I/O SKEW
PJI ; UNNECESSARY I/O
REQUESTS
/*TERMS USED IN QUERY SPOTLIGHT:*/