Temp Tablespace space needed to create an index of 52GB - preventing 01652

Hi,
I've seen quiet a few threads on the subject, but could not find a clear (to me) answer on the subject.
We have a huge table made by 30/40 partitions of roughly 20M records each (each record being about 1k of size), overall 800GB.
The index we already have shows:
1* select sum(bytes/1024/1024) from dba_segments where segment_name like 'CALL_LOG_I0'
SQL> /
SUM(BYTES/1024/1024)
52088
so that I assume it's 52GB in size. Since we have to create another very similar one I would assume the size would be similar.
Command would be:
create index call_log_i0_new on call_log (msisdn, generation_timestamp, cdr_reference_number, Multiple_AMA_Sequence_Number) NOLOGGING online;
Tried the NOSORT option but it's not compatible with the online option.
After a while the TEMP tablespace got filled up (we have about 20GB space in there).
My question is if I need to have a temp tablespace at least as big as the index size (52GB) to let the index be built online.
Thanks in advance !
Cheers,
Mike

Thanks to all, found useful information in Metalink following your suggestions:
You need to add more space to the tablespace where the index is created.
A possible option to reduce sort space usage is to use the NOSORT option.
Your table contains 66 million rows. The average row length is
50-60 bytes and you are indexing 4 of 5 columns in the table.
Example space calculation:
66 million rows * 50 (avg row length) = 3.3 gig of data
Rule of thumb:
upper bound for sort (not guaranteed) is 3 times data_
= about 10 gig of sort space needed
These numbers are scaring since assume that I may need much more space than the index size (about 3x) which is something we cannot afford. Will go with the NOSORT option once the system is brought down and we could skip the online option.
Thanks to all !
Mike

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Bill Planey wrote:
For a catalog of about 350 pages, I need both a manufacturer index and a product index. I have read some of the creative solutions already posted here and in other web discussions, and I have an idea.
Why not create two Book files? one could be "Catalog-Product.indb" and the other could be "Catalog-Manufacturer.indb". Basically two separate contexts for the series of layouts. When in the Product book, do all the indexing for that context, update the Product index and close the set of files (saving the Catalog-Product.indb as well and then closing it). Then open the Catalog-Manufacturer book and do the indexing for the Manufacturer index, generate it, save and close.
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Jozsef wrote:
Hi there,
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|   1 | INDEX BUILD NON UNIQUE| T1_I1 |       |       |            |          |
|   2 |   SORT CREATE INDEX    |       | 10000 | 40000 |            |          |
|   3 |    TABLE ACCESS FULL   | T1    | 10000 | 40000 |     6   (0)| 00:00:01 |
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You don't have to believe me or the docs.
Try it yourself. That is the best way to learn. Post your results here for all to see.
That is what that 12c doc says and what ALL of the docs for the versions before say. See for yourself. Here is the doc link for Oracle 7.3 so you can see the CREATE DATABASE systax yourself
http://docs.oracle.com/cd/A57673_01/DOC/server/doc/SQL73/ch4a.htm#createdatabase
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3. Create your own PDB seed database without a temp tablespace and then clone your seed to create other PDBs without a temp tablespace
4. Use CREATE DATABASE to create a DB without a temp tablespace and then plug it in to your CDB root container.
Those are ALL standard methods. The last three result in PDBs withoug a temp tablespace.
#1 is what you should be using.
1. Create PDB with a temporary tablespace.
2. Shrink/resize the temp tablespace down to a minimum if you want
3. Assign the users to the CDB temp tablespace if you don't want them using the PDB temp
I would appreciate if you only answer to questions if you have tested it or have a precise answer to it!
I have done BOTH of those things. Your failure to recognize that is NOT my problem.
I have created a PDB without a temp tablespace using DBCA and a custom template.
I have also created a PDB without a temp tablespace by using the historical standard method of CREATE DATABASE without a temp tablespace and then plugging it into the CDB and a PDB.
It is YOUR responsibility to RTFM and YOUR responsibility to actually put your fingers on the keyboard and try things.
The forum is NOT a coding service so you have no right to expect someone to write code for you and no right to get upset if they don't.
dbca doesn't use any other commands than the one's I've already tried!
Your reality is different than Oracle's. Support your reality with some facts.
I just created a PDB (create pluggable database) and no wonder that one comes with a temp tablespace.
I don't see where you posted ANYTHING that shows:
1. exactly WHAT you did
2. exactly HOW you did it
3. exactly what results you got.
If you want help with the code or a process you are using you have to POST that code or process.
We can NOT see your computer screen to see what screens you see or what entries you make.
Complain about the messenger all you want.
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Hello
How important is it that this process completes in a specific amount of time? We have critical billing processes that only run once per month, but they have to run within a 2 hour window, so we are using all available techniques to ensure the process completes in the time limit.
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class CustomerGroup
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If you write a custom ValueExtractor, which you need to create an index, then you will not need a custom Filter.
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You can then use a ContainsFilter for your query. For example to get all the values from the cache where the customerValues map contains a 19 in the key...
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Discalimer I have written the code above from the top of my head so have not compiled it or tested it but it should be OK.
JK

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Temp Tablespace space needed to create an index of 52GB - preventing 01652

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