| deep understanding of extends needed... [message #7383] |
Tue, 10 June 2003 13:00  |
NikoD
Messages: 2
Registered: June 2003
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Junior Member |
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Initial, next, sort area size, db block size, pctincrease. Can anyone provide a better understanding of the sizing options and how to properly calculate them as with the following example?
Create tablespace temp
datafile '/disk5/oradataMYDB01/temp01.dbf' size 300M
default storage (initial 2M next 2M pctincrease 50
maxextents 3)
temporary;
Having a dificulty grasping the idea using the cybex books.
Thank you all for any information and clarification you can provide.
Niko.
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| Re: deep understanding of extends needed... [message #7384 is a reply to message #7383] |
Tue, 10 June 2003 13:23  |
Todd Barry
Messages: 4819
Registered: August 2001
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Senior Member |
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Since your example used TEMP...
1) You should be creating a true temporary tablespace - not a tablespace of type temporary (old way). The new way will create sparse tempfiles instead of datafiles.
2) You should be using locally managed tablespaces. No need to even bother with initial, next, or pctincrease parameters.
3) The extent size of the temporary tablespace should be a multiple of the sort_area_size.
Factoring in all these statements, your command becomes:
create temporary tablespace TEMP
tempfile '/disk5/oradataMYDB01/temp01.dbf' size 300M
extent management local
uniform size 1M;
This assumes a sort_area_size of 1M.
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| Re: deep understanding of extends needed... [message #7449 is a reply to message #7384] |
Fri, 13 June 2003 17:06 |
NikoD
Messages: 2
Registered: June 2003
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Junior Member |
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Todd, thank you for your kind response. I am studying for the fundamentals I exam and I feel a bit shakey on this part of initial, next or pctincrease. I wanted to see if someone could explain it better that the book I am using. Thank you for the suggestion and I will keep it in consideration when I start working as a junior DBA :) I want to know more that just what will work, so my understanding will be deeper and better...
Regards,
Niko Dimos
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