Rollback segment issue in oracle8i

We are having 33GB size of Rollback segment , it is not coming down even after when the database get bounced.
Even the transactions are not happening also it is showing same value and it is not coming down.
My question is after transaction get over whether rollback segment is deallocated or not?
Please explain in detail , how to deallocate those unused rollback segments.

we dont have any distributed transactions.
can u tell me is there any formula to set OPTIMAL value for roll back segments.
please tell me the dependencies,
& i have some more quries....
1. If we shrink the rollback segment, will it grow later on when the transactions are going high???
2.If we shrink through OEM, automatically oracle is shrinking that perticular RBS.
here my doubt is on which basis Oracle is shrinking that RBS.
Please give info,, in detail...

Similar Messages

Rollback segment issue

while running my script i am getting following error. My script is doing lakhs and lakhs of transactions
ORA-01562: failed to extend rollback segment number 3
ORA-01628: max # extents (99) reached for rollback segment DACSCANRBS_2
How to overcome this?

Can you post your script? The best option is to ask your DBAs to give you a large rollback segment to use to overcome this issue. However, if you are doing lots of different updates without any commits, you may be able to split the script into several transactions.

ORA-01581: attempt to use rollback segment...

We've started getting "ORA-01581: attempt to use rollback segment (31) new extent (3) which is being allocated" messages in our production database over the last couple of days. Of course, each time we get these the rollback segment number is different, and we are getting these randomly from different applications that connect to the same database. We are using automatic undo management, so the rollback segments are not really under our control. The action in the Oracle docs for this error message doesn't give any specific actions that we should take, but we continue to get these.
We started to get these about the same time as we ran out of available sessions on the database (sessions = 1500 and we had 1500 open sessions). Could these be related? Could there be some open session that may be causing the rollback segment issue? Would a restart of the database fix this? Of course the max sessions issue was cleaned up two days ago but the rollback segment issue is a lingering problem.
Any help would be appreciated. We couldn't find anything for this online and Oracle hasn't responded to our service request yet.
Thanks,
Bobby

As I understand it, you can not explicitly set the size for the undo segments in automatic undo management mode. From the Concepts guide:
"In automatic undo management mode, the system controls exclusively the assignment of transactions to undo segments, and controls space allocation for undo segments."
It looks like we are also using the default storage options that are set when the UNDO tablespace was created. Here is the DDL used to create this tablespace:
CREATE SMALLFILE UNDO TABLESPACE "UNDOTBS" DATAFILE '/alpha/oradata/prod01/undotbs01.dbf' SIZE 750M REUSE AUTOEXTEND ON NEXT 25600K MAXSIZE 2000M , '/alpha/oradata/prod01/undotbs03.dbf' SIZE 2000M REUSE AUTOEXTEND ON NEXT 51200K MAXSIZE 2000M , '/alpha/oradata/prod01/undotbs04.dbf' SIZE 2000M REUSE AUTOEXTEND ON NEXT 104K MAXSIZE 2000M , '/alpha/oradata/prod01/undotbs02.dbf' SIZE 2000M REUSE AUTOEXTEND ON NEXT 25600K MAXSIZE 2000M

Rollback segment Error coming for 8 lacks Record while creating MV

Hi All,
i am creating a materialized View and it gives us 8 lacks record but when we creates in production its fails due to rollback segment does not have enough space to handle it and it did not create the MV.
can anyone help me out to resolve this issue for the below query while creating MV.
SELECT DISTINCT NVL
((ROUND ((jt_date_completed - jt_date_requested) * 24, 2)
0
) AS actual_hrs_to_complete,
NVL ((ROUND ((jt_date_responded - jt_date_requested) * 24, 2)
0
) AS actual_hrs_to_respond,
peo1.peo_name AS agent_name,
peo1.peo_user_name AS asagent_soe_id,
le.lglent_desc AS ap_system,
' ' AS assign_work_request_comment,
DECODE (jt.jt_bill_id,
138802, 'CLIENT BILLABLE',
138803, 'CONTRACTED',
138804, 'INTERNAL BILLABLE',
NULL, ' '
) AS billable,
bl.bldg_name_cc AS building, bl.bldg_id_ls AS building_id,
DECODE (bl.bldg_active_cc,
'Y', 'ACTIVE',
'INACTIVE'
) AS building_status,
DECODE (jt.jt_wrk_cause_id,
141521, 'STANDARD WEAR AND TEAR',
141522, 'NEGLIGENCE',
141523, 'ACCIDENTAL',
141524, 'MECHANICAL MALFUNCTION',
141525, 'OVERSIGHT',
141526, 'VANDAL',
141527, 'STANDARD',
141528, 'PROJECT WORK',
6058229, 'TEST',
NULL, ' '
) AS cause_type,
' ' AS comments, peo3.peo_name AS completed_by,
jt.jt_requestor_email AS contact_email,
jt.jt_requestor_name_first
|| ' '
|| jt.jt_requestor_name_last AS contact_name,
jt.jt_requestor_phone AS contact_phone,
cc.cstctrcd_apcode AS corp_code,
cc.cstctrcd_code AS cost_center,
jt.jt_date_closed AS date_closed,
jt.jt_date_completed AS date_completed,
jt.jt_date_requested AS date_requested,
jt.jt_date_responded AS date_responded,
jt.jt_date_response_ecd AS date_response_ecd,
jt.jt_date_scheduled AS date_scheduled,
DECODE (jt.jt_def_id,
139949, 'WTG VENDOR RESPONSE',
139950, 'WAITING ON PARTS',
139951, 'LABOR AVAILABILITY',
139952, 'DEFERRED- HI PRI WORK',
139953, 'WTG APPROVAL',
139954, 'FUNDING REQUIRED',
139955, 'ACCESS DENIED',
139956, 'WTG MATERIAL',
NULL, ' '
) AS deferral_reason,
jt.jt_description AS description,
jt.jt_date_resched_ecd AS ecd,
fmg.facility_manager AS facility_manager,
fl.floors_text AS FLOOR, gl.genled_desc AS general_ledger,
' ' AS kiosk_date_requested, ' ' AS kiosk_dispatch_confirmed,
' ' AS kiosk_dispatched,
eqp.equip_customer_code AS linked_equipment_alias,
eqp.equip_id AS linked_equipment_id,
eqp.equip_text AS linked_equipment_name,
DECODE (jt_originator_type_id,
1000, 'PROJECT MOVE REQUEST',
138834, 'CUSTOMER INITIATED CORRECTION',
138835, 'CUSTOMER INITIATED REQUEST',
138836, 'CORRECTIVE MAINTENANCE',
138837, 'CONFERENCE ROOM BOOKING',
138838, 'PROJECT INITIATED REQUEST',
138839, 'PLANNED PREVENTIVE MAINTENANCE',
138840, 'SELF INITATED REQUEST',
NULL, ' '
) AS originator_type,
' ' AS payment_terms, priority_text AS priority_code,
swoty.sworktype_text AS problem_type,
prop.property_name_cc AS property,
jt.jt_cost_quote_total AS quote_total,
par.levels_name AS region,
DECODE (jt.jt_repdef_id,
141534, 'ADJUSTED SETTING',
141535, 'TRAINING FOR END',
141536, 'NEW REQUEST',
141537, 'NO REPAIR REQUIR',
141538, 'REPLACED PARTS',
141539, 'REPLACE EQUIPMEN',
1000699, 'NEW REQUEST',
NULL, ' '
) AS repair_definitions,
jt.jt_repairdesc AS repair_description,
jt.jt_requestor AS requestor, ' ' AS requestor_cost_center,
jt.jt_requestor_email AS requestor_email,
jt.jt_requestor_name_first AS requestor_name,
jt.jt_requestor_phone AS requestor_phone,
' ' AS response_time, rm.room_name_cc AS room,
p1.peo_provider_code1 AS service_provider,
p1.peo_address_1 AS service_provider_address,
peocity.city_text service_provider_city,
p1.peo_provider_code1 AS service_provider_code,
peocity.city_country_name AS service_provider_country,
peocur.currency_text AS service_provider_currency,
p1.peo_name AS service_provider_description,
p1.peo_dispatch_method AS serv_prov_dispatc_hmethod,
p1.peo_rate_double AS serv_prov_double_time_rate,
p1.peo_email AS service_provider_email,
p1.peo_emergency_phone AS serv_prov_emergency_phone,
p1.peo_fax AS service_provider_fax_number,
p1.peo_home_phone AS service_provider_home_phone,
p1.peo_rate_hourly AS service_provider_hourly_rate,
p1.peo_title AS service_provider_job_title,
p1.peo_method_id AS service_provider_method,
p1.peo_cell_phone AS service_provider_mobile_phone,
p1.peo_pager AS service_provider_pager,
p1.peo_rate_differential AS service_provider_rates,
p1.peo_rate_differential AS ser_prov_shift_differential,
peocity.city_state_prov_text AS serv_prov_state_province,
DECODE (p1.peo_active,
'Y', 'ACTIVE',
'INACTIVE'
) AS service_provider_status,
p1.peo_url AS serv_prov_web_site_address,
p1.peo_phone AS service_provider_work_phone,
p1.peo_postal_code AS serv_prov_zip_postal_code, ' ' AS shift,
' ' AS skill,
DECODE (jt.jt_bigstatus_id,
138813, 'NEW',
138814, 'PENDING',
138815, 'OPEN',
138816, 'COMPLETED',
138817, 'CLOSED',
138818, 'CANCELLED',
NULL, ' '
) AS status,
lev.levels_name AS subregion, ' ' AS trade,
p1.peo_ls_interface_code1 AS vendor_id,
p1.peo_fax AS vendor_purchasing_fax,
p1.peo_vendor_site_code AS vendor_sitecode,
jt.jt_id AS vendor_ticket, p1.peo_name AS vendor_companyname,
jt.jt_requestor_vip AS vip, wo.wo_id AS work_order_no,
jt.jt_id AS work_request,
jt.jt_class_id AS work_request_class,
woty.worktype_text AS work_type, ' ' AS wr_cost,
jt.jt_description AS wr_description,
' ' AS wr_dispatch_method,
DECODE (jt.jt_bigstatus_id,
138813, 'NEW',
138814, 'PENDING',
138815, 'OPEN',
138816, 'COMPLETED',
138817, 'CLOSED',
138818, 'CANCELLED',
NULL, ' '
) AS wr_status,
ctry.country_name AS country
FROM citi.jobticket jt,
citi.property prop,
citi.bldg bl,
citi.bldg_levels bldglvl,
citi.LEVELS lev,
citi.LEVELS par,
(SELECT crstools.stragg (peo_name) facility_manager,
bldgcon_bldg_id
FROM citi.bldg_contacts, citi.people
WHERE bldgcon_peo_id = peo_id
AND bldgcon_contype_id IN (40181, 10142)
GROUP BY bldgcon_bldg_id) fmg,
citi.floors fl,
citi.room rm,
citi.general_ledger gl,
citi.legal_entity le,
citi.cost_center_codes cc,
citi.equipment eqp,
citi.worktype woty,
citi.subworktype swoty,
citi.work_order wo,
citi.jt_workers jtwo,
citi.priority,
citi.country ctry,
citi.people p1,
citi.people peo3,
citi.people peo1,
citi.city peocity,
citi.currency peocur
WHERE jt.jt_bldg_id = bl.bldg_id
AND bl.bldg_id = bldglvl.bldg_levels_bldg_id
AND bldglvl.bldg_levels_levels_id = lev.levels_id
AND lev.levels_parent = par.levels_id(+)
AND prop.property_id = bl.bldg_property_id
AND bl.bldg_active_ls <> 'N'
AND jt.jt_floors_id = fl.floors_id(+)
AND jt.jt_room_id = rm.room_id(+)
AND jt.jt_bldg_id = fmg.bldgcon_bldg_id(+)
AND jt.jt_genled_id = gl.genled_id(+)
AND gl.genled_lglent_id = le.lglent_id(+)
AND jt.jt_cstctrcd_id = cc.cstctrcd_id(+)
AND jt.jt_equip_id = eqp.equip_id(+)
AND jt.jt_id = jtwo.jtw_jt_id(+)
AND jt.jt_worktype_id = woty.worktype_id(+)
AND jt.jt_sworktype_id = swoty.sworktype_id(+)
AND jt.jt_wo_id = wo.wo_id
AND jt.jt_priority_id = priority_id(+)
AND jt.jt_date_requested >= ADD_MONTHS (SYSDATE, -12)
AND bl.bldg_country_id = ctry.country_id
AND jtwo.jtw_peo_id = p1.peo_id(+)
AND p1.peo_city_id = peocity.city_id(+)
AND jt.jt_completed_by_peo_id = peo3.peo_id(+)
AND p1.peo_rate_currency_id = peocur.currency_id(+)
AND jt.jt_agent_peo_id = peo1.peo_id(+);
Regards
shyam~

Hi,
Its ora-1555? IS your undo_retention sufficient?
Since you are developer the only option you have is to tune the query?
Am curious to know like I create materialized view so that I do not have to run complex query on the master database / or to prevent the access to master database more than once to get the same data?
Like to know which is your case because your query seem to be too complex to be the case for former. Do you think this materialized view would be used frequently in your application?
Regards
Anurag Tibrewal.

Forcing a specific rollback segment on a transaction does not seem to work

Hi!
We're using Oracle 9.2.0.5.0 on Sun Solaris and we're still configured to use Rollback Segments.
We have an issue with Snapshot too old due to RBS too small on a long query I attach below for reference:
set heading off
set pagesize 0
set feedback off
set linesize 200
<<<<< SET TRANSACTION USE ROLLBACK SEGMENT UMF_RBS_LARGE_TRAN; <<<<<
SELECT ucms_cards.msisdn
|| ';;' || to_char(to_date(substr(ucms_cards.notes,14+length(ucms_cards.msisdn),19),'MM-DD-YYYY.HH24-MI-SS'),'DD/MM/YYYY HH24:MI:SS')
|| ';;' || to_char(ucms_batches.expiry_date,'dd/mm/yyyy')
|| ';;' || ucms_cards.serial_no
|| ';;' || ucms_cards.serial_no
|| ';;' || ucms_cards.batch_serial_no
|| ';;' || ' '
|| ';;' || CASE ucms_cards.card_status
WHEN 'used' THEN '1'
ELSE '0'
END
|| ';;' || CASE WHEN date_booked_in is null THEN '01/01/1970 00:00:00' ELSE to_char(date_booked_in,'DD/MM/YYYY') || ' 00:00:00' END
|| ';;' || ' '
from ucms_batches,ucms_cards, UCMS_EVENT_LOG
WHERE ucms_cards.batch_serial_no = ucms_batches.serial_no
AND ucms_cards.serial_no = substr(UCMS_EVENT_LOG.ENTITY_ID,11,length(UCMS_EVENT_LOG.ENTITY_ID)-9)
AND UCMS_EVENT_LOG.PARTY_NO in (0)
AND UCMS_EVENT_LOG.TIMESTAMP>=TO_TIMESTAMP(TO_CHAR(SYSDATE-1, 'DD-MM-YYYY') || ' 00:00:01', 'DD-MM-YYYY HH24:MI:SS')
AND UCMS_EVENT_LOG.TIMESTAMP<=TO_TIMESTAMP(TO_CHAR(SYSDATE-1, 'DD-MM-YYYY') || ' 23:59:59', 'DD-MM-YYYY HH24:MI:SS')
AND UCMS_EVENT_LOG.USER_ID LIKE 'SCP-AGENT1%'
AND UCMS_EVENT_LOG.EVENT_TYPE_ID IN (1,2)
AND UCMS_EVENT_LOG.ENTITY_TYPE_ID LIKE 'ucms_cards%'
UNION
SELECT ucms_imported_cards.msisdn
|| ';;' || to_char(to_date(substr(ucms_imported_cards.notes,14+length(ucms_imported_cards.msisdn),19),'MM-DD-YYYY.HH24-MI-SS'),'DD/MM/YYYY H24:MI:SS')
|| ';;' || to_char(ucms_imported_cards.expiry_date,'dd/mm/yyyy')
|| ';;' || ucms_imported_cards.serial_no
|| ';;' || ucms_imported_cards.serial_no
|| ';;' || DBMS_UTILITY.GET_HASH_VALUE(ucms_imported_cards.card_type,1,65536)
|| ';;' || ' '
|| ';;' || CASE ucms_imported_cards.card_status
WHEN 'used' THEN '1'
ELSE '0'
END
|| ';;' || '01/01/1970 00:00:00'
|| ';;' || ' '
from ucms_imported_cards, UCMS_EVENT_LOG
where ucms_imported_cards.serial_no = substr(UCMS_EVENT_LOG.ENTITY_ID,11,length(UCMS_EVENT_LOG.ENTITY_ID)-9)
AND UCMS_EVENT_LOG.PARTY_NO in (0)
AND UCMS_EVENT_LOG.TIMESTAMP>=TO_TIMESTAMP(TO_CHAR(SYSDATE-1, 'DD-MM-YYYY') || ' 00:00:01', 'DD-MM-YYYY HH24:MI:SS')
AND UCMS_EVENT_LOG.TIMESTAMP<=TO_TIMESTAMP(TO_CHAR(SYSDATE-1, 'DD-MM-YYYY') || ' 23:59:59', 'DD-MM-YYYY HH24:MI:SS')
AND UCMS_EVENT_LOG.USER_ID LIKE 'SCP-AGENT1%'
AND UCMS_EVENT_LOG.EVENT_TYPE_ID LIKE '2%'
AND UCMS_EVENT_LOG.ENTITY_TYPE_ID LIKE 'ucms_imported_cards%';
As you see we forced the session to use a huge RBS created for the purpose, but strangely after a long while the query fails with a RBS too small failure due to another RBS, not the one specified.
Is there any chance the UNION or any other component of the query is implicitly opening a new transaction with a different RBS associated?
Any chance to force the same RBS specified explicitly?
Thanks!
Mike

albertone wrote:
but strangely after a long while the query fails with a RBS too small failure due to another RBS, not the one specified.You misunderstand snapshot too old. It can be caused by other sessions same as by your session. Assume AFTER your session issued select some other session modified one (or more) tables ucms_batches, ucms_cards, UCMS_EVENT_LOG and committed changes. By the time your select reaches to fetch rows modified by that other session rollback extents in rollback segment used by that other session were reused. You will get snapshot too old. Bottom line - all sessions modifying table(s) used by your select must use rollback segments large enough so they are not overwritten before corresponding rows are needed by your select.
SY.

Error rollback segment while exporting a table

I am getting error while exporting a table, can someone advise me how i can handle this issue.
EXP-00056: ORACLE error 1555 encountered
ORA-01555: snapshot too old: rollback segment number with name "" too small
ORA-22924: snapshot too old
Thanks

Hi, I have the same problem...
I have a table with a blob type (14740 records)
I have increase the PCTVERSION to 100 (= maximum)
undo_retention = 604800 (7 days)
undo tablespace = 2 Gb
exporting with parameter CONSISTENT=n
Still I got the message
EXP-00056: ORACLE error 1555 encountered
ORA-01555: snapshot too old: rollback segment number with name "" too small
ORA-22924: snapshot too old
When exporting the table
What do I have to do more ?????

Pb with rollback segment

Hi guys.
Am using oracle 8i and am having problems with rollbackup segment. My rbs tablespace is 35GB and will like to shrink it! Its a production db, so my question is shoudl I fire the below query?
alter rollback segment SYSTEM shrink;
alter rollback segment RBS__BIG shrink;
alter rollback segment RBS01 shrink;
alter rollback segment RBS02 shrink;
alter rollback segment RBS03 shrink;
alter rollback segment RBS04 shrink;
alter rollback segment RBS05 shrink;
alter rollback segment RBS06 shrink;
Is there any downside? Please advice.
Thanks.

Hi Friend,
Production DBs are always having big transactions, These transactions obviously hold large memory in rollback segments. You will not face any issue after srinking it but if any transaction is failed and it has not been enrolled or flush out from your rollback segment. You will be not able to recover the data from rollback segment. I would suggest use share table space here instead of shrinking it. Atleast it will help to to recover current transaction in case of calamity.
Thanks,
Nitin joshi

Rollback Segments

Hello all,
I am hoping someone can help me. I have a dev and prod
instance, with identical rollback segment specs. The problem I
have is that I am running out of space on one of my instances
(dev). The prod instances rbs's are all the same size while the
dev instance rbs's are all over the place. One rbs (in dev) may
be at 10mb and another at 800. I don't know why the size
doesn't reduce after I issue a commit. I think the problem is
that the rbs's for both instances are public and one set of
rbs's is only being used. Can any offer any suggestions? Thank
you!

I would like to suggest 2 things :
1) make all rollback segments to same size
2) set optimal storage parameter of rollback segment.

Rollback segment number not shown with name " not shown " too small

Hi,
we have a table TABLE1 with a BLOB field FIELD1 on a Oracle 10g database. Today we found out that there is one record in that table that make problems. if we try to read the BLOB data from that record, Oracle shows the error:
ORA-01555: snapshot too old: rollback segment number with name "" too small
The strange thing about it, that the message shows neither the segment number nor the segment's name. Like it has lost the reference to it.
Could you help please.
Notes:
The TABLE1 and the BLOB data are really not big.
The UNDO tablespace is 2Gb big and just 1% used.
Thank you very much
Igor

Out-of-row LOB undo is maintained in the LOB segment. So the UNDO tablespace and undo retention is not associated with most LOB ORA-1555 issues. Instead the LOB column is created using either PCT_VERSION or RETENTION to manage how much space within blocks or time transpires before the LOB undo is overwritten. In environments with high updates, deletes on rows including LOBs, the chances of ORA-1555 on LOB undo is very high.
Source:http://blogs.oracle.com/db/entry/troubleshooting_ora_1555
In the above link you will get plenty of good metalink notes to understand and solve the issue.
There is no undo segment name in the error message means this error has no relation with undo tablespace/parameter/segment. This might mean that your LOB table is corrupted. Can you drop and recreate/re-populate this table and try again ?
Srini Chavali @ Another "snapshot too old: rollback segment number with name "" too small"
Regards
Girish Sharma

How to online datafile of rollback segment of NO archive log available

I set offline datafile of rool back segement and rename it
but when I try to online , get error to recover
I try to recover but unfortunately all archive log was deleted ( kind of cron job in unix aotu delete these file)
Pls advice how can I set this data file online without the archive log ( while databse still up and running) Oracle version is 8i not possible to drop datafile by sql.
in roll back segment I have 3 data files as below and the rb04.dbf is offline
usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs01.dbf
/usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs03.dbf
/usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs04.dbf
sequence of what I did is below:
SQL> alter database datafile '/usr/Systems/1354RM_1/databases/dbsnml/data/rbs04.dbf' offline;
Database altered.
SQL> alter tablespace RBS rename datafile '/usr/Systems/1354RM_1/databases/dbsnml/data/rbs04.dbf' to '/usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs04.dbf';
Tablespace altered.
SQL> alter database datafile '/usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs04.dbf' online;
alter database datafile '/usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs04.dbf' online
ERROR at line 1:
ORA-01113: file 13 needs media recovery
ORA-01110: data file 13:
'/usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs04.dbf'
SQL> recover datafile '/usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs04.dbf';
ORA-00279: change 71449081 generated at 12/23/2008 20:18:05 needed for thread 1
ORA-00289: suggestion :
/usr/Systems/1354RM_1_7.1_Master/OSRES/data/warm_repl/WarmArchive/arch_1_455922.
arc
ORA-00280: change 71449081 for thread 1 is in sequence #455922
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
ORA-00308: cannot open archived log
'/usr/Systems/1354RM_1_7.1_Master/OSRES/data/warm_repl/WarmArchive/arch_1_455922
.arc'
ORA-27037: unable to obtain file status
HP-UX Error: 2: No such file or directory
Additional information: 3

SQL> alter tablespace RBS rename datafile '/usr/Systems/1354RM_1/databases/dbsnml/data/rbs04.dbf' to '/usr/Systems/1354RM_1_7.1_Master/databases/dbsnml/data/rbs04.dbf';Did you rename the file at OS level after you issued above command? Oracle will not rename the file at OS level.
Other than that, if you plan to change rollback segment tablespace, better create a new one and create new rollback segment in new tablespace and drop the old one.

System Error:Database access error,rollback segment number with name "" too small

Hi Experts,
In SXMB_MONI XML messages for File2File scenario are failing
with the below message:
Database access error
com.sap.aii.utilxi.misc.api.ResourceException: ORA-01555: snapshot too
old: rollback segment number with name "" too small ORA-22924: snapshot
too old at com.sap.aii.utilxi.blob.api.AIIBlob.getByteArray
(AIIBlob.java:85) at
com.sap.aii.utilxi.blob.api.AIIBlobImpl.getByteArray
(BlobServices.java:156)
I have refered this link http://scn.sap.com/thread/3147106
Kindly suggest,
Gagan.

This may be due memory issue on the server. refer the note/thread as
http://scn.sap.com/thread/3456694
3807 - Error messages regarding rollback and undo segments
Regards
Ramg

ROLLBACK SEGMENT NEEDS RECOVERY AND HOW TO RESOLVE IT

제품 : ORACLE SERVER
작성날짜 : 1995-02-06
Subject :
This article discusses what it means when a rollback segment needs
recovery and how to resolve it.
OVERVIEW
This bulletin discusses why a rollback segment is the status of
"needs recovery", what the status means, and how to resolve it.
INTRODUCTION
Rollback segments can be monitored through the data dictionary view,
dba_rollback_segments. There is a status column that describes what state
the rollback segment is currently in. Normal states are either online or offline.
Occasionally, the status of "needs recovery" will appear.
This is considered to be a corrupted rollback segment.
When a rollback segment is in this state, bringing the rollback segment
offline or online either through the alter rollback segment command or
removing it from the rollback segments parameter in the init.ora usually has no effect.
UNDERSTANDING
A rollback segment falls into this status of needs recovery whenever
Oracle tries to roll back an uncommitted transaction in its transaction
table and fails.
Here are some examples of why a transaction may need to rollback:
1-A user may do a dml transaction and decides to issue rollback
2-A shutdown abort occurs and the database needs to do an instance recovery
in which case, Oracle has to roll back all uncommitted transactions.
When a rollback of a transaction occurs, undo must be applied to the
data block the modified row/s are in. If for whatever reason, that data
block is unavailable, the undo cannot be applied. The result is a
'corrupted' rollback segment with the status of needs recovery.
What could be some reasons a datablock is unaccessible for undo?
1-If a tablespace or a datafile is offline or missing.
2-If the object the datablock belongs to is corrupted.
3-If the datablock that is corrupt is actually in the rollback segment
itself rather than the object.
HOW TO RESOLVE IT
1-MAKE sure that all tablespaces are online and all datafiles are
online. This can be checked through dba_data_files under the
status column. For tablespaces, look in dba_tablespaces.
If that still does not resolve the problem then
2-PUT the following in the init.ora-
event = "10015 trace name context forever, level 10"
Setting this event will generate a trace file that will reveal the
necessary information about the transaction Oracle is trying to roll
back and mostimportantly, what object Oracle is trying to apply
the undo to.
3-TAKE the corrupted rollback segment out of the rollback_segments parameter in the init.ora
4-SHUTDOWN the database (if normal does not work, immediate, if that does
not work, abort) and bring it back up.
Note: An ora-1545 may be encountered, or other errors, that is ok.
5-CHECK in the directory that is specified by the user_dump_dest parameter
(in the init.ora or show parameter command) for a trace file that was
generated at startup time.
6-IN the trace file, there should be a message similiar to-
error recovery tx(#,#) object #.
TX(#,#) refers to transaction information.
The object # is the same as the object_id in sys.dba_objects.
7-USE the following query to find out what object Oracle is trying to
perform recovery on.
select owner, object_name, object_type, status
from dba_objects where object_id = <object #>;
8-THIS object must be dropped so the undo can be released. An export or
relying on a backup may be necessary to restore the object after the corrupted
rollback segment goes away.
9-AFTER dropping the object, put the rollback segment back in the init.ora
parameter rollback_segments, removed the event, and shutdown and startup
the database.
In most cases, the above steps will resolve the problematic rollback segment.
If this still does not resolve the problem, it may be likely that the corruption is
in the actual rollback segment.
At this point, if the problem has not been resolved, please contact
customer support.

Yes we were having the performance issues when it is getting locked? in this what i want to know
why it happens suddenly?
or what package this piece of code is calling?
or is there any possiblity of system will degrade the performance like sys user etc...?
where exactly i found the root cause for further analysis?
so that next time onwards if particular objects is locking we come to know why it happens is there any logical false or how do we eliminate this issue last time?
coz in our environment sometimes most of lockings are from the same table?
pls let me know where i have to concentrate for debug and how to troubloshoot and reslove this
sorry for the inconvience.. i m expecting the answer from here. if anybody wants some more info i ll let him know.
as of till now i got some docs i start to read this.
Regards
M.Murali..
Note: will system/sys degrade the performance ?if so how ?

Rollback segment error ORA-1628

Hellow
Currently we are working on Oracle 8i database.The database contain spatial data around 10GB.We have a tablespace RBS containing 4 rollback segments. The issue is whenever we try to insert spatial data we get this error message (in the alert file)
ORA-1628: max # extents 121 reached for rollback segment R01
Failure to extend rollback segment 2 because of 1628 condition
FULL status of rollback segment 2 cleared.
I extended the size of RBS tablespace by adding another datafile, but still it doesn't help.
Also i found that RBS tablespace is marked as PERMANENT...it means the rollback data does not get flushed out periodically?Also Should this tablespace be temporary? How can i counter this problem?
Regards
Sam

Hi,
01628, 00000, "max # extents (%s) reached for rollback segment %s"
// *Cause: An attempt was made to extend a rollback segment that was
// already at the MAXEXTENTS value.
// *Action: If the value of the MAXEXTENTS storage parameter is less than
// the maximum allowed by the system, raise this value. => Alter your RBS and allow more than 121 extents to be created in this RBS.
Also i found that RBS tablespace is marked as PERMANENT.Yes, it's normal.
..it means the rollback data does not get flushed out periodically?No
Also Should this tablespace be temporary? No, this can't be
How can i counter this problem?Free advise: RTFM about Rollback Segments! Start here (8i doc) or read the Concepts book.
Regards,
Yoann.

Failed to extend Rollback Segment

Version of the database is
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
I have a rollback tablespace that is 99%used and wen I am tryng to use DML statements to the database it is throwing the following error.
ORA-01562:FAILED TO EXTEND ROLLBACK SEGMENT 2
ORA-01650:UNABLE TO EXTEND ROLLBACK SEGMENT RBS01 BY 128 IN TABLESPACE
R
May I know how do I proceed now? Do I have to extend the tablespace or add a new datafile to the tablespace?

PK wrote:
Version of the database is
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
I have a rollback tablespace that is 99%used and wen I am tryng to use DML statements to the database it is throwing the following error.
ORA-01562:FAILED TO EXTEND ROLLBACK SEGMENT 2
ORA-01650:UNABLE TO EXTEND ROLLBACK SEGMENT RBS01 BY 128 IN TABLESPACE
R
May I know how do I proceed now? Do I have to extend the tablespace or add a new datafile to the tablespace?
01562, 00000, "failed to extend rollback segment number %s"
// *Cause: Failure occurred when trying to extend rollback segment
// *Action: This is normally followed by another error message that caused
//        the failure. You may take the rollback segment offline to perform
//         maintainence. Use the alter rollback segment offline command
//         to take the rollback segment offline.
bcm@bcm-laptop:~$ oerr ora 1650
01650, 00000, "unable to extend rollback segment %s by %s in tablespace %s"
// *Cause: Failed to allocate an extent of the required number of blocks for
//          a rollback segment in the tablespace.
// *Action: Use ALTER TABLESPACE ADD DATAFILE statement to add one or more
//          files to the tablespace indicated.

ORA-1650: unable to extend rollback segment

Hi,
We have 20 RBS's and in our production instance we got very frequent alerts related to ORA-1650: unable to extend rollback segment continuously. When I looked for select STATUS from v$rollstat; I could see most of them are with FULL status. after couple of hours they disappeared and status became online.
How to avoid these type of alerts?
REgards

What version of Oracle?
If you are 9ir2 or later, you should be going to automatic undo management. Though it won't help your 'we cannot add space' restriction. That's not an Oracle problem, that's a corporate issue.
This problem may be caused by poor transaction design with too many processing doing too infrequent commits. That's not an Oracle problem either, that's a corporate/development issue.
So...you don't have an Oracle problem.
You can't stop the 1650s from occurring if you are unwilling to add space or address application issues. However, you can set up an email filter so that any emails containing ORA-01650 in the header or body get automatically sent to the trash.
<sarcasm>
If you can't solve a problem, then just ignore it!
</sarcasm>

Rollback segment issue in oracle8i

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