Re: Question on tuning Advisor

Below docs does state it executes the sql partially, which means the tuning advisor really executes the underlying sql and that is why mostly the additional load came into picture while it's running and thus people kept it as turned off.

https://docs.oracle.com/database/121/TGSQL/tgsql_sqltune.htm#TGSQL569

On Fri, Jan 15, 2021 at 12:06 AM Lok P <loknath.73_at_gmail.com> wrote:

> Thanks Much for the confirmation.
>
> Does it actually run/trigger the exact application sql queries behind the
> scene by itself? or just get the information from awr/ash stats only
> without actually running any sql?
>
> Regards
> Lok
>
> On Thu, Jan 14, 2021 at 11:27 PM Noveljic Nenad <
> nenad.noveljic_at_vontobel.com> wrote:
>
>> We’ve turned the following advisors off on all of our databases: sql
>> tuning, segment space and statistics advisors, because they were causing
>> significant load on the system without providing any useful information.
>> We’ve never looked back.
>>
>>
>>
>> Disclaimer: I’m not an expert, just a longtime practitioner.
>>
>>
>>
>> Best regards,
>>
>>
>>
>> Nenad
>>
>>
>>
>> http://nenadnoveljic.com/blog/
>>
>>
>>
>>
>>
>>
>>
>> *From:* oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> *On
>> Behalf Of *Lok P
>> *Sent:* Donnerstag, 14. Januar 2021 18:49
>> *To:* Oracle L <oracle-l_at_freelists.org>
>> *Subject:* Question on tuning Advisor
>>
>>
>>
>> Wanted to know experts' opinion , if we should turn off automatic tuning
>> advisor jobs. We normally don't see that report or say in other words , we
>> have not got much useful information from automatic tuning advisors
>> jobs reports which can really improve things . Creating new indexes is
>> something that appears most of the time which is not always a feasible
>> option to be implemented. And it does have load in the database while it's
>> running during the specific window(not sure if it actually runs all the sql
>> behind the scene), so is it a good idea to turn this job OFF? We are
>> currently on 11.2.0.4 in this case, so is it better in the recent versions
>> and we should turn it On then?
>>
>>
>>
>> Regards
>>
>> Lok
>>
>> ____________________________________________________
>>
>> Please consider the environment before printing this e-mail.
>>
>> Bitte denken Sie an die Umwelt, bevor Sie dieses E-Mail drucken.
>>
>>
>> Important Notice
>> This message is intended only for the individual named. It may contain
>> confidential or privileged information. If you are not the named addressee
>> you should in particular not disseminate, distribute, modify or copy this
>> e-mail. Please notify the sender immediately by e-mail, if you have
>> received this message by mistake and delete it from your system.
>> Without prejudice to any contractual agreements between you and us which
>> shall prevail in any case, we take it as your authorization to correspond
>> with you by e-mail if you send us messages by e-mail. However, we reserve
>> the right not to execute orders and instructions transmitted by e-mail at
>> any time and without further explanation.
>> E-mail transmission may not be secure or error-free as information could
>> be intercepted, corrupted, lost, destroyed, arrive late or incomplete. Also
>> processing of incoming e-mails cannot be guaranteed. All liability of
>> Vontobel Holding Ltd. and any of its affiliates (hereinafter collectively
>> referred to as "Vontobel Group") for any damages resulting from e-mail use
>> is excluded. You are advised that urgent and time sensitive messages should
>> not be sent by e-mail and if verification is required please request a
>> printed version. Please note that all e-mail communications to and from the
>> Vontobel Group are subject to electronic storage and review by Vontobel
>> Group. Unless stated to the contrary and without prejudice to any
>> contractual agreements between you and Vontobel Group which shall prevail
>> in any case, e-mail-communication is for informational purposes only and is
>> not intended as an offer or solicitation for the purchase or sale of any
>> financial instrument or as an official confirmation of any transaction.
>> The legal basis for the processing of your personal data is the
>> legitimate interest to develop a commercial relationship with you, as well
>> as your consent to forward you commercial communications. You can exercise,
>> at any time and under the terms established under current regulation, your
>> rights. If you prefer not to receive any further communications, please
>> contact your client relationship manager if you are a client of Vontobel
>> Group or notify the sender. Please note for an exact reference to the
>> affected group entity the corporate e-mail signature. For further
>> information about data privacy at Vontobel Group please consult
>> www.vontobel.com.
>>
>

--
http://www.freelists.org/webpage/oracle-l