Re: Storage Clause in Create Table Statement.

similar thread already answered, but here it goes: 1) there's no storage clause on the table, so your tablespace   defaults will be used - check these!
2) pctincrease=0 - as someone once said, picture yourself   building a house with bricks all different in size, whould you   like that?
3) initial=(align with block size, or 64k boundary), next same. If you have an estimate for sizes, you could try a best estimate initial, and keep next about 1/10th of that (but aligned: e.g. initial 5M, next 512k).
If you have no clue, consider that fact the table might be empty, or just contain a few records; initial 16k, next 512k. Rationale: you'll need at least 2 blocks (defaults 8k @ 4k blocksize), allow some slack. Next 512k: don't waste time allocating new blocks.

hth,
Frank

Troy Simpson wrote:
>
> I'm trying to understand how to allocate space to a table segment in the
> Storage Clause of the Create Table Statement. I have read what appears
> to be conflicting information. If I know before creating the table that
> I have 8 Megs of data to add to the table, should I set the Initial
> Extent to equal 8 Megs? Or, should I set all extent to be the same
> size? I have also read that the number blocks per extent may effect
> performance due to the operating system's I/O buffer size and the
> parameter db_file_multiblock_read_count in the init.ora file.
>
> Here is a sample of a create table statment that I'm working with.
>
> Create Table Employee
> (
> id Number(11) NOT NULL,
> fname VarChar(30),
> lname VarChar(30),
> CONSTRAINT Employee_id_pk PRIMARY KEY ( id ) USING INDEX TABLESPACE
> Data_Indexes
> )
> Storage
> (
> Initial 10240
> Next 10240
> MinExtents 1
> MaxExtents unlimited
> PctIncrease 50
> )
> Tablespace Data_Tables
>
> Any other comments would also be appreciated.
>
> Thanks,
> Troy
>
> --
> Troy Simpson | North Carolina State University
> NCSU Libraries | Campus Box 7111 | Raleigh | North Carolina
> ph.919.515.3855 | fax.919.513.3330
Received on Thu Aug 31 2000 - 09:44:05 CDT