Temp space during import

I am doing schema refresh...running out of temp space on development....has 500 MB space...no time to add space because storage team has no space they requsted space...for now running import please suggest option
Oracle--10.2.0.3
Using IMP utility
Loading around 8 Gb of data...

abhishek gera wrote:
By default, import commits at the end of each table, therefore it is very
likely your rollback segments will run out of space.
To workaround this problem, without adding space to the rollback segment
tablespace, you can specify 'COMMIT=Y' on import. This overrides the
default and commits at the end of each buffer (also an import parameter),
rather than at the end of the table.No, it's not at all likely, I think. The OP is running out of temp space, not undo. I don't think this is relevant.

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How much TEMP space needed for datapump import?

How does one accurately predict how much TEMP table-space is needed prior to starting a data-pump import (via impdp)? I need a way to predetermine this BEFORE starting the import. It is my understanding that in data-pump imports, temp table-spaces are primarily used for the building of indexes among other operations.

Yes, I could use autoextend but that just shifts the problem of checking the logical table-space size to checking the physical space to see that it has enough room to extend.
I was really hoping for a formula to calculate the amount of TEMP space it would take up. For example, RichardHarrison's post above about setting the TEMP table-space size to be twice as large as the largest index, but wasn't sure on the accuracy of that statement. I was hoping someone has encountered this kind of scenario before and found an accurate way to predict how much space is really needed, or a good estimate to go by.
I will try out the idea of setting the TEMP space size to be twice the size of the largest index and see how that goes, as it doesn't seem there is a practical way of accurately determining how much space it really needs.
Thanks everyone.
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Temp space problem

HI all,
I receive an error while executing a procedure.
ORA-01652: unable to extend temp segment by 128 in tablespace TEMP
can any one please exlain what is the problem.
thanks in advance
baskar k

hi
First ORA-01652 may occur because there is simply no space available in the temp tablespace of which is being used. The second cause of ORA-01652 may have to do with the local temp segment not being able to extent space even though there is space in other instances.
To trouble shoot for ORA-01652, and find out which of the above scenarios are causing ORA-01652 use this query offered by MetaLink:
select sum(free_blocks)
from gv$sort_segment
where tablespace_name = '<TEMP TABLESPACE NAME>'
You will know that the first scenario is causing ORA-01652 to be thrown if the free block reads '0' because it signifies that there is no free space.
If there is a good amount of space, you know that there is another cause for ORA-01652, and it is probably the second scenario. It is important to note that in a non-RAC environment, local instances are not able to extend the temp segments, so in the RAC environment, ORA-01652 has to be handled differently. If you are experiencing ORA-01652 in a non-RA environment, be aware that every SQL making use of the tablespace can fail.
In RAC, more sort segment space can be used from other instances, which can help resolve ORA-01652 more easily. Try using the query below:
select inst_id, tablespace_name, total_blocks, used_blocks, free_blocks
from gv$sort_segment;
Basically, you can then find out how much temp segment space can be used for each instance by viewing the total_blocks, and the used_blocks can reveal the space which has been used so far, and and the free_blocks gives the amount of space allocated to this particular instance. This being, to resolve ORA-01652, you can check out that used_blocks = total_blocks and free_blocks = 0 will probably show for the instance, and ORA-01652 will be shown multiple times within the alert log.
This basically means that free space from other instances is being requested, and typically signifies that there is instance contention. Instance contention within the temporary space can make the instance take more time to process.
In sever cases, a slowdown may occur, in which you might want try one of the following work-arounds:
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Increase sort_area_size and/or pga_aggregate_target
However, remember to not use the RAC feature of DEFAULT temp space.
If ORA-01652 is causing the slowdown, SMON will probably not be able to process the sort segment requests, you you should try to diagnose the contention:
Output from the following query periodically during the problem:
select inst_id, tablespace_name, total_blocks, used_blocks, free_blocks
from gv$sort_segment;
Global hanganalyze and systemstate dumps
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Hello
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PTR3 STORAGE (INITIAL 0000000016 K NEXT 0000000016 K MINEXTENTS 0000000001 MAXEXTENTS UNLIMITED PCTINCREAS"
There is enaught space on disk and in tablespaces (it is an oracle/HPux server).
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are you importing these transport requests simultaneously into production?
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Rohit

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What is problem in this case? During import of SAPKB70017 and SAPKB70018 I get following error(there is no SLOG file in /usr/sap/trans/log):
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Hi Jan,
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Compiled Feb 24 2009 23:41:07
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(DB) INFO: connected to DB
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10.207.3.59\d$\ftproot\import_sap\BWS\ABAP\DATA\ARFCSDATA.TOC
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\\10.207.3.59\d$\ftproot\import_sap\BWS\ABAP\DATA\ARFCSDATA.TOC
Please check if above said file located under specified path where SAPINST searvhing for it ie at
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Also check if user from which you have started this SAPINST is able to access
10.207.3.59\d$\ftproot\import_sap\BWS\ABAP\DATA.
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Hello
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Hello
I've finally resolved this and the resolution was relatively simple - and was also the main thing that Mark Rittman said he did in his article: reduce the size of the hash join.
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HTH
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Temp space during import

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