1.

Let us say that I have a program it uses dynamic SQL. It has been working fine till now, however, lately, I have found that the performance has been affected and deteriorated. Can you guess what can be the reason behind this?

Answer»

There can be 2 POSSIBILITIES:

  • RUN STATS is not done and it seems that the program is using an incorrect/wrong index due to incorrect/wrong stats.
  • It MIGHT also be the case that the RUN STATS has been done but the optimizer has CHOSEN a wrong access path based on the latest statistics.


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