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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 ?
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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 |
Hash collision?
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