Resolution of requests for long durations

Hello

We can directly implement the recommendations provided by MS Oracle SQL Tuning advisor *(10g) * as it is long running queries or we must make additional measurements?

I hope that we must compare the SQL execution to the existing query plan and query recommended, is that enough or more? Thanks for posting

Thank you
Hari.

Hello

I think so

We can directly implement the recommendations provided by MS Oracle SQL Tuning advisor *(10g) * as it is long running queries or we must make additional measurements?

NO can't you. IE you can accept the profile recommended by Advanced optimizer, but it didn't affect/change the already for a long time the application runing.

I hope that we must compare the SQL execution to the existing query plan and query recommended, is that enough or more? Thanks for posting

SQL profile contain generally advance information required by the optimizer to produce effective explain the plan. If you look inside the SQL profile, you will find that it contains ultimately a set of TIPS of SQL.

So to answer your first question, NO, because when SQL Analysis first hard/soft it parse already have generate / used its query plan, then you cannt change an existing query running. The new accepted SQL profile will be used the next time.

Answers to your second question - once you run the SQL tuning advisor you would see typically other recommends, for example, statistics are out of date, create the new set of index etc etc. So you should first focus on these recommendations first. I know its bit cubersome to apply all of these recommendations, but practically when you implement these reco (except accept the sql profile) and still perform SQL Tuning advisor then could see previous recommendations went away (you already implemented like them), but if the SQL Setup again recommend to accept the profile so I think it would be OK. Because you already explored other tuning techniques recommended by the optimizer. Also the profile SQL too can become obsolete and to maintain their.

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