UndoTBS Management

Question

Hello Everybody,
I have a script to import some data in my database (this script is based on imports with .dump files (two files which are approximatly 449 Mb and 40 Mb) and it
is not working because of my undo tablespace's size.
I can see it's full with
select x.tablespace_name NOM_TABLESPACE,
sum(x.bytes)/(1024*1024) || ' Mo' TAILLE_INITIALE,
NVL((select sum(bytes) from sys.dba_free_space y where x.tablespace_name = y.tablespace_name group by y.tablespace_name)/(1024*1024),0) ||' Mo' ESPACE_LIBRE,
NVL(to_char(((select sum(bytes) from sys.dba_free_space y where x.tablespace_name = y.tablespace_name group by y.tablespace_name)/sum(x.bytes))*100,'00.00'),' 0') || ' %' POURCENTAGE_LIBRE
from sys.dba_data_files x
group by x.tablespace_name;
Then I guess it try to put the data in the temp tablespace because I have got the following error :
ORA-1652: unable to extend temp segment by 128 in tablespace TEMP.
Actually, I am running out of space and can't extend my undo tablespace to more than 2Gb.
Moreover I can see that the database is approximatly using 1.3Gb in the tablespaces.
I have read how the UndoTBS works and it should be okay because I didn't activated the guarantee mod so even if undo request are not expired, they can be erased. So I totally don't understand.
Here is the scenario each time :
I try my script with 1Gb as result I have undotablespace full and errors in my script
So when I want to go for a try with 2Gb. I have to create a new undotbs, drop the current one, and put
the new one as undotbs.
Do you know if there is any way to avoid using the undo tablespace ? (Even, just the time to restore my database) ?
the problem doesn't come from the script because with few data it works fine.
Thanks for your help and sorry for the english mistakes I made.

Answer 1

user10509149 wrote:
Hello Everybody,
I have a script to import some data in my database (this script is based on imports with .dump files (two files which are approximatly 449 Mb and 40 Mb) and it
is not working because of my undo tablespace's size.
I can see it's full with
select x.tablespace_name NOM_TABLESPACE,
sum(x.bytes)/(1024*1024) || ' Mo' TAILLE_INITIALE,
NVL((select sum(bytes) from sys.dba_free_space y where x.tablespace_name = y.tablespace_name group by y.tablespace_name)/(1024*1024),0) ||' Mo' ESPACE_LIBRE,
NVL(to_char(((select sum(bytes) from sys.dba_free_space y where x.tablespace_name = y.tablespace_name group by y.tablespace_name)/sum(x.bytes))*100,'00.00'),' 0') || ' %' POURCENTAGE_LIBRE
from sys.dba_data_files x
group by x.tablespace_name;
Then I guess it try to put the data in the temp tablespace because I have got the following error :
ORA-1652: unable to extend temp segment by 128 in tablespace TEMP.No, it's not putting the data in the temp TS. That's not what oracle uses it for. Probably a massive sort as internal work to build an index.
>
Actually, I am running out of space and can't extend my undo tablespace to more than 2Gb.What was pointing to your undo tablespace? You've not shown anything to implicate it.
Moreover I can see that the database is approximatly using 1.3Gb in the tablespaces.
I have read how the UndoTBS works and it should be okay because I didn't activated the guarantee mod so even if undo request are not expired, they can be erased. So I totally don't understand.
Here is the scenario each time :
I try my script with 1Gb as result I have undotablespace full and errors in my script
So when I want to go for a try with 2Gb. I have to create a new undotbs, drop the current one, and put
the new one as undotbs.
Do you know if there is any way to avoid using the undo tablespace ? (Even, just the time to restore my database) ?
the problem doesn't come from the script because with few data it works fine.
Thanks for your help and sorry for the english mistakes I made.