Capacity Planning for Creation of Table

Question

Hello Guys,
I just need some advise here.
I have been told to work out the space needed for the creation of a table.
The table in question would have three columns with datatypes [num(10), varchar(10),date] and would be loaded with 100,000 rows. How do I go about it.
Thanks in Advance

Answer 1

Try with something like this, may help you.
Prerreqs: parameter OPTIMIZER_MODE != RULE.
grant to execute DBMS_SPACE
DDL Table creation:
CREATE TABLE SAMPLE
ID               NUMBER(9),
NAME             VARCHAR(50),
CREATE_DATE_TIME DATE,
MOD_DATE_TIME    DATE,
USER_ID          VARCHAR(15)
set serveroutput on
declare
   calc_used_bytes  NUMBER;
   calc_alloc_bytes NUMBER;
   cols             sys.create_table_cost_columns;
begin
   cols := sys.create_table_cost_columns
           sys.create_table_cost_colinfo('NUMBER',   9),
           sys.create_table_cost_colinfo('VARCHAR2', 50),
           sys.create_table_cost_colinfo('VARCHAR2', 15),
           sys.create_table_cost_colinfo('DATE',     NULL),
           sys.create_table_cost_colinfo('DATE',     NULL)
   DBMS_SPACE.CREATE_TABLE_COST (
       tablespace_name => 'USERS',
       --avg_row_size    => 100,   quitar comentario para 11g
       row_count       => 5000,
       pct_free        => 10,
       used_bytes      => calc_used_bytes,
       alloc_bytes     => calc_alloc_bytes
   dbms_output.put_line('Used      (M): '||round(calc_used_bytes/(1024*1024)));
   dbms_output.put_line('Allocated (M): '||round(calc_alloc_bytes/(1024*1024)));
end;
/More info: http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_space.htm#i1003180
Regards.
johnxjean
Edited by: johnxjean on 18-Mar-2011 09:43
Edited by: johnxjean on 18-Mar-2011 09:44