Estimating an application's requirements

Question

Hello,
I'm new to estimating an application's size requirements. I am looking at APEX hosting companies and am wondering which of their service plans to choose and if a provider that uses 10g express will serve my needs. For example, I want to know if I'll outgrow a plan with 50MG of oracle space in a few months or a few years and if I should start with a provider with full 10gR2 edition rather than Express.
I have a basic data capture application where the main table that will grow has 30 rows that will capture text. There will probably be 1500 records created each week. I'll need to keep 2 years of data available at all times.
Any suggestions on how to estimate much db space I will need in in 6 months, 12 months, etc? This is harder than building the actual application!
Thanks,
Matt

Answer 1

Hmm,
It does not look so hard once you break it down.
2 years of data = 2 * 52 weeks = 104 weeks of data
1500 records/week * 102 weeks = 153000 records you'll need to have at any given point in time
Create your schema on its own tablespace and take note of its size. Then adapt this code to your needs (add columns, change data types, etc):
DECLARE
  x VARCHAR2( 255 );
BEGIN
  x := 'String that resembles you actual data';
  FOR i IN 1..153000 LOOP
    INSERT INTO T1 ( ID, COL1 ) VALUES ( i, x );
  END LOOP;
END;Then you'll have an estimate of how much space you need. You should, of course, take indexes into account.
By the way, I believe this code REALLY could use bind variables.
Regards,
Georger
mterlesky wrote:
Hello,
I'm new to estimating an application's size requirements. I am looking at APEX hosting companies and am wondering which of their service plans to choose and if a provider that uses 10g express will serve my needs. For example, I want to know if I'll outgrow a plan with 50MG of oracle space in a few months or a few years and if I should start with a provider with full 10gR2 edition rather than Express.
I have a basic data capture application where the main table that will grow has 30 rows that will capture text. There will probably be 1500 records created each week. I'll need to keep 2 years of data available at all times.
Any suggestions on how to estimate much db space I will need in in 6 months, 12 months, etc? This is harder than building the actual application!
Thanks,
Matt