Re: performance questions

Hi Sai,

I'd like to help, but I'm not sure what your question is. Are you asking whether a SLA (I don't really see them that often here in Denmark, fortunately) should be static or dynamic? Or are you asking how to have measurements that are independent of data growth and other varying factors? Or something completely different?

Best regards,

Mogens

Sai Selvaganesan wrote:

> hi gurus
>
> this is a kind of query i have faced a few times in the recent past
> and which has really forced me to start this thread.
>
> as everyone knows, there is always what we call a SLA or in other
> words a service level agreement (may be called differently in
> different places) which infact means defining a time for any
> transaction to go thru in the database. This is very important in
> emvironments which handle transactions affecting sales or just normal
> queries against huge databases which helps a sales force or a front
> office customer support force.. Defining this is always a difficult
> task and i believe will keep changing as time goes on - factors like
> number of records,the number of databases running on a box(probably
> SLA was defined initially on a single box-single db kind of env and
> now the same box has more databases),memory,network,disk
> performance,number of transactions or can i say the load profile et
> al. there have been cases where i have been asked questions like why
> this query took more time than SLA when it was running ok sometime
> back. i find it very difficult to convince saying that ther! e are
> factors affecting this and not just explain plan et al(correct me if i
> am wrong) or in other words a scenario that says my test environment
> is running faster than prod (everything on the db side are the same
> except the way the disks are configured or the load profile on both dbs).
>
> here is my question? is there a way to determine this SLA. since it
> keeps changing how do we really determine it. there is a soltuion that
> comes right out saying abenchmark can help u do this but how do we
> extrapolate or assume that there was no benchmark done at the
> beginning how do we validate/dtermine this magic number.
> i have some ideas on this but nothing is very concrete.
>
> can someone give me some feedback on this..if u feel that this is not
> a right question to be put in this forum i apologize but i would like
> to take this up with someone who is interested and i wouldnt use this
> mailing list for the same.
>
> thanks for ur time
> sai

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