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ORA-01555: snapshot too old: rollback segment number 14 with name "_SYSSMU14$"
Dear Friends,
I am facing the following error:
"ORA-01555: snapshot too old: rollback segment number 14 with name "_SYSSMU14$" too small"
Here are the system and other necessary details...
Database: Oracle 10204 64-Bit
OS: SUSE LINUX SLES 10 64-bit X86
SQL> show parameters undo
NAME TYPE VALUE
------------------------------------ -----------
undo_management string AUTO
undo_retention integer 4200
undo_tablespace string UNDOTBSP
The size of the UNDO Tablespace: 40GB (10GB files a total of 4)
TableSpace Size (kb) Free (kb) Used % Free %
--------------- ------------ ------------ ------ ------------
UNDOTBSP 40,960,000 39,056,192 5 95
Max. Bytes/Minutes Avg. Bytes/Minutes Max Space (Mb) Avg Space (Mb)
------------------ ------------------ -------------- --------------
31,291,802 8,035,427 2,089 536
I still dont understand that, even though we have allocated such a huge space to UNDO tablespace, and it is not even using it 100%..why is the system is throwing the error...
Thank you,
Nikee
-Nikee
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May be try seeing the v$undostats performance view, this gives the undo generated in 10min window interval. So that this give you more detailed info.
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your undo retention isn't long enough for that query
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Originally Posted by davey23uk
your undo retention isn't long enough for that query
Dave is correct - as he is most of the time.
Check alert log, Oracle wrote down for how long query ran before abend... bet you find query ran for more than 4200 seconds.
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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