RE: DBA Humor (Twisted, sick sort of stuff...)

  • From: "Sheehan, Jeremy" <JEREMY.SHEEHAN@xxxxxxxxxxxxxxxxx>
  • To: "rjamya@xxxxxxxxx" <rjamya@xxxxxxxxx>, Ram Raman <veeeraman@xxxxxxxxx>
  • Date: Thu, 28 Mar 2013 12:45:32 +0000

Someone at my work was complaining of slowness in one of our DB's.  Groaning 
with the lack of specificity, I went to go an check and found that the database 
was being hammered.  Looking around Grid, I found one statement was causing the 
problem.  It was a developer selecting from 8 different tables with no 
parameters.  Yeah.  Cartesian join on 8 tables.  

Jeremy 

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of rjamya
Sent: Thursday, March 28, 2013 8:36 AM
To: Ram Raman
Cc: ORACLE-L
Subject: Re: DBA Humor (Twisted, sick sort of stuff...)

What queries? LOL !! I said "consultants designed datamart". Which means they 
had the datamart, but, 1. no one had defined how it will be used 2. No one knew 
how to query it 3. No one could query it once it was loaded since they did so 
much of transformation in their (ahem) ETL process.

So, it was a datamart that loaded about 40m_ rows every night into a DB, which 
were promptly useless. Data retention was supposed to be 7 years, we fought 
hard to bring it down to 3. Mind this, it was a standalond db, with a DR, (they 
also wanted a HA as well as a GG replicated copy for "reporting" purpose). 
After listening to costs, only primary and HA remained.

I dont know the current status, everything else was running smoothly, except 
for this one.

Raj


On Wed, Mar 27, 2013 at 4:56 PM, Ram Raman <veeeraman@xxxxxxxxx> wrote:

> I am sure that speeded up the inserts on the tables with the concerned 
> indexes.
>
> Did that speed up some of the queries?
>
>


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