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Collect Table Stats [message #598135]

Thu, 10 October 2013 10:26

Diego Pafumi
Messages: 12
Registered: July 2004

Junior Member

Hi to all,

I need some assistance on this issue. We are running 11g (11.2.0.3)
We have a "working table" that is empty at the beginning of the day.
Then we start adding rows (insert) with a key column called STATE with a value of 100.
At the same time, there are other apps that pickup data in state 100 , process that data and change that state to 200 or 300.
There is also another app that pickup data in state 200 , process that data and change that state to 300 or 400.

So in summary, the data on that table is at the beginning empty, then all the rows are in state 100, they slowly move to different states (200, 300, etc) and by the end of the day, they are all in 400.

My question is what would be the best way to collect stats on this table?

I was thinking to create an hourly job to collect stats on that table:
exec dbms_stats.gather_table_stats (
ownname => 'SCOTT',
tabname => 'WORK_TABLE',
estimate_percent => dbms_stats.auto_sample_size,
degree => 3,
cascade => true );

Any suggestions? Should we cancel the Oracle Standard jobs executed at 10 PM?

Thanks!!

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Re: Collect Table Stats [message #598136 is a reply to message #598135]

Thu, 10 October 2013 10:29

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

what problem are you trying to solve?
How will you know when this problem has been solved?

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Re: Collect Table Stats [message #598138 is a reply to message #598136]

Thu, 10 October 2013 11:10

Diego Pafumi
Messages: 12
Registered: July 2004

Junior Member

Hello,
The problem is with queries using that table:
select .... from WORK_TABLE where state = xxxx

They were slow. So I applied that logic of collecting stats hourly. I wonder if there is a better way to do that.

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Re: Collect Table Stats [message #598139 is a reply to message #598135]

Thu, 10 October 2013 11:12

Michel Cadot
Messages: 68739
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

Do not collect any statistics, the only "static" statistic along the day is the number of rows, so set it (using SET_TABLE_STATS procedure) after loading the table. The number of blocks will likely never change so set it once for the table life duration.

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