Hi All,
can anyone tell me how many types of Skew exists? whats the
difference between amp skew,data skew,cpu skew, io skew,
delta amp cpu ?
- 2 Answers
- 13865 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / yuvaevergreen
Adding to above,
Cpu skew->
1 or more AMPs are processing most of the data while other
AMPs are processing very little data.
Max(CPUTime) / Avg(CPUTime) from Ampusage can also give a
CPU skew figure.
| Is This Answer Correct ? | 6 Yes | 0 No |
How many types of Skew exists?
If you utilized unequally TD resources(CPU,AMP,IO,Disk and
etc) this is called skew exists. Major are 3 type of skews
(CPU skew,AMP/Data skew, IO Skew).
-Data skew?
When data is not distribuited equally on all AMPs.
-Cpu skew?
Who is taking/consuming more CPU called cpu skew.
-IO skew?
Who perform more IO Operation. called IO Skew.
| Is This Answer Correct ? | 5 Yes | 0 No |
Name the five phases that come under MultiLoad Utility.
How is MLOAD Client System restarted after execution?
any one pls tell me what are the table names in banking project?
Give some points about Teradata Viewpoint ?
What are two examples of an OLTP environment?
sel a.t1,b.t1 from emp a left outer join dept b ON a.id=b.id where b.deptno=10; sel a.t1,b.t1 from emp a left outer join dept b ON a.id=b.id and b.deptno=10; what is the difference on the above 2 queries?
Why do you get spool space errors? How do trouble-shoot them?
What are tpump utility limitations?
Can any one plz provide the teradata interview questions?
Differentiate primary key and partition key?
What are the steps involved in the process flow of the sql statement through channel attached system?
hi frnds i want to learn teradata utilities and teradata dba real time. i have 1+ years of experience in teradata. so i want to go deeply in Tearada. plz let me know at my email id who r best to learn from. im lookng for a realtime guy in HYD or Banglr. Thanks in advance. Rajesh my email-id: rajeshmss87@gmail.com
Teradata 
