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| ORA-01555 | | ORA-01555: | snapshot too old: rollback segment number string with name "string" too small | | Cause: | rollback records needed by a reader for consistent read are overwritten by other writers | | Action: | If in Automatic Undo Management mode, increase undo_retention setting. Otherwise, use larger rollback segments
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| Posts about ORA-01555 | | This sounds similar to a known bug with ASSM tablespaces. The stats job
updates tables in SYSAUX. Those tables have indexes and up to 10.2.0.2 if
an instance does massive DML (which the stats job doDuration 1151404820? That 's like 36+ years... a bit odd uh? )
Anyway ORA-1555 is often thrown regardless space availability in UNDO
tablespace. You can get it any time for read only transaction (oDear DBAs
I have this recent error in alert log coming from the
stats update job. Though the SQL is given partly not
able to find the EXACT database object that had
problem. Any clue?
..
....
TueHi
Please look at the alert log error I got
It shows ORA-01555 but the query duration is 0 seconds. How is that
possible that query goe the error just after starting
this is Oracle 9.2.0.5 runningHi Stephane
I think I haven 't explained my query very well as you 're the second person
with the same feedback -(
I understand that if a session at 10 00 makes some uncommitted changes then
there Tony
You have missed what is called read consistency - Oracle guarantees
that what you 'see ' when querying a table reflects the state of the
table when you hit <return > after your SELECT statemenHi All
ORA-01555 caused by SQL statement below (SCN 0x0314.01fa70b6)
Mon Oct 3 18 52 31 2005
SELECT /*+NESTED_TABLE_GET_REFS+*/ "FDBK_USER ". "TRANSACT_RECORD ".* FROM
"FDBK_USER ". "TRANSACT_RECORD " Hi List
Background Oracle 9.2.0 w/ Auto Undo Management
We have a huge table and it takes more than 24 hours to collect its statistics.
But the undo_retention is set to 864000 i.e. 24 hours. As aRE A special way of migration
I read the concepts before I replied.
I just don 't understand how consistent y will "The whole export will be read
into undo segments "
The user doing the dml will "buiIt 's a very busy critical production system. When we saw the "cannot
allocate new log " messages we increased the redo logs from 8x256Mb to
16x256Mb and the messages disappeared. But our analysis Jeffery
Yes the database does things like that. It will create additional
segments as needed offline them when apparently no longer needed until
they are no longer referenced see undo_reHi all
I have got one problem. I am running a script in which my first statement
is " SET TRANSACTION USE ROLLBACK SEGMENT RBS01 " but the script is throwing
error as " ora-01555 snapshot too Hi
The code needs to work on oracle 8i and 9i. The current code occasionally
gave "Ora-01555 Snapshot too old " error (becuase there is a commit within
the loop for each 1000 rows which I took
>
>Mark Bole wrote
>
>
>Hmmm.. from "Oracle Performance Tuning 2nd edition " (Gurry and 20
>Corrigan 20
>O 'Reilly Press 1996) -- so were talking version 7 RBO here
>
> "Contrary to populORA-01555 snapshot too old rollback segment number 3 with name "RBS02 "
too small
Production got one of these last night from two huge jobs trying to run
against a table in the range of 200M Hi All
I see a few ORA-01555 Snapshot too old errors in the alert log daily.
The trace file doesn 't give much clue about the application/SQL that is
causing the error.
I 'm planning to set evI just recently converted a single instance from auto to manual due to
an alert from Siebel when trying to do an upgrade. While they claimed
there process only works with a traditional large singleI just ordered the Oak Table Oracle Wait Interface and 10G New Features
(Mr. Freeman 's book).
Thanks to all of the authors who work so hard to put these books together
for those of us who do not hHi List
just a little question about read only tbs
We have big tables that are loaded once and never updated during the month
so I think it 's a good thing to switch their tbs to read only Balu
Steve Adams has a terrific explanation at
"http //www.ixora.com.au/tips/admin/ora-1555.htm ". At the bottom he posts
a series of scripts as a last resort on preventing the ORA-01555 error I use UNDO however I still got the famous ORA-01555. The funny thing is
it happened during an analyze and it was consistent. I was using
dbms_stats procedure. Every day when the analyze job raWell I suggest you to have one LMT with uniform extent size of 67108864 bytes
and forget about sizing and re-sizing. To save you the trouble of calculating
64*1048576 67108864. Nothing like the binDan
I think that you 've hit upon the only possible explanation especially
regarding your comment that "eventually it will get a 1555 error ". The
flip-side of ORA-01555 is more work spent rebui
I just came across this bug in a reference from Note 252686.1
OSS 's Note 3060261.8 "Bug 3060261 <Queue_table >.ENQ_TIME and V$ view TIME
columns may be ahead of SYSDATE "
isn 't clear whether it Hi list!
we encounter a very strange "ORA-01555 snapshot too old rollback segment
number 3 with name "_SYSSMU3$ " too small "
This is a very long query
With a query that only make a select stateYour original error indicated that your undo_retention value was too small to process the original query. This is different than the size of the undo_tablespace. They are related. The higher the uI understand that the cost value does not mean anything. But from my
experience when I see a query 's cost from explain plan reaches six
digits usually something is not right.
Anyway the actual |
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