Questio about ASSM managed tablespaces?

Hi, we have a 2 node RAC cluster running 10.2.0.3 on linux itanium and we have some tablespaces that we have configiured using ASSM with automatic allocation set for extent mgmt and also automagic for segment space mgmt.
We are an online E-tail site and we have periods of high trafffic and have alot of updates happening in the database with objects that are in the new table spaces and ny question is...Would it be wiser to not let oracle handle to extent mgmt and instead set the uniform allocation for extents?
My other question is, can you preallocate extents so that the application would never have to wait when the next extent has to be initialized into the segment?
Thanks.

I personally prefer uniform extents and, in cases like yours, pre-allocation.
It also makes sense in environments where traffic is predictable to set up large extents so that fewer allocations/time are required.
At least that is what I have seen in my testing. Your mileage may vary so test it on your hardware and version.

Similar Messages

Manual segment space managed tablespaces , How tune?

I use Manual segment space managed tablespaces.
How I can tuning for high performance?
What's advantage and disavantage of Manual segment space managed tablespaces and Auto segment space managed tablespaces?
if I used more data.
I'll use Auto or manual?
Please introduce me.

ASSM deal with freelist, freelist group(RAC) storage parameters. If you use ASSM you dont need to worry about adjusting freelist and group, oracle will automatically deal with it. If you are using manual storage segment management there would no problem unless you you see heavy buffer busy waits on your tables. You may also play with freelist value for tables which have concurrent inserts and access to avoid buffer busy waits.
From oracle 9i Rel 2 onwards, you have segment level statistics to find out which segments causing more buffer busy waits and tune them accordingly. There are other meaning for buffer busy waits, check v$event_name for buffe busy waits and find out the reason code for the cause of buffer busy waits event.
Jaffar

Rollback segment in locally manage tablespace

Is it possible to create rollback segment in
locally manage tablespace in oracle 8i(8.1.6)
kuljeet pal singh

Srini,
Both the 10gR2 and 11gR2 versions of the database are using automatic undo management.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
SQL> show parameter undo
NAME TYPE VALUE
_undo_autotune boolean TRUE
undo_management string AUTO
undo_retention integer 14400
undo_tablespace string UNDOTBS1
SQL>
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show parameter undo
NAME TYPE VALUE
undo_management string AUTO
undo_retention integer 14400
undo_tablespace string UNDOTBS1
SQL>
Do you know anything about Oracle no longer automatically creating R0 in 11gR2?
Thanks,
Bill

ORA-12913: Cannot create dictionary managed tablespace

I am using the following statement:
CREATE TABLESPACE data01
DATAFILE 'D:\ORACLE\ORADATA\SSR\data01.dbf' SIZE 2M
EXTENT MANAGEMENT DICTIONARY;
and I get the following error message:
ORA-12913: Cannot create dictionary managed tablespace
If I take off EXTENT MANAGEMENT DICTIONARY, the statement executes. What am I doing wrong?

Details about create a tablespace:
CREATE TABLESPACE
Purpose
Use the CREATE TABLESPACE statement to create a tablespace, which is an allocation of space in the database that can contain persistent schema objects.
When you create a tablespace, it is initially a read/write tablespace. You can subsequently use the ALTER TABLESPACE statement to take the tablespace offline or online, add datafiles to it, or make it a read-only tablespace.
You can also drop a tablespace from the database with the DROP TABLESPACE statement.
You can use the CREATE TEMPORARY TABLESPACE statement to create tablespaces that contain schema objects only for the duration of a session.
See Also:
Oracle9i Database Concepts for information on tablespaces
ALTER TABLESPACE for information on modifying tablespaces
DROP TABLESPACE for information on dropping tablespaces
CREATE TEMPORARY TABLESPACE
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96540/statements_74a.htm#SQLRF01403
Joel P�rez

Downsides to Locally Managed Tablespaces?

I am creating a database from scratch and am looking at locally managed tablespaces.
Are there any downsides to locally managed tablespaces?
I understand that if the SYSTEM tablespace is locally managed, then all other tablespaces need to be locally managed. Are there any cons to this?

<quote source="AskTom.oracle.com">
Locally managed tablespaces are much faster at allocating and de-allocating
extents - many order of magnitudes faster.
locally managed tablespaces decrease contention on the data dictionary.
There is nothing bad about them, only good things.
</quote>
http://asktom.oracle.com/pls/ask/f?p=4950:8:720407411417074486::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:409670433426

Explain local manage tablespace and dictionary manage tablespace

hi all,
kindly help me to understand local manage and dictionary manage tablespace
i have read search result and oracle corporation book still unable to understand
what i know that local is managed by bitmap(no redo) and dictionary is managed by dictionary(generates redo) plz explain this as well
and also suggest me some documentation.
thanks
Navin

Navin,
These are excerpts from Oracle documentation
Dictionary Managed Tablespace_
If you created your database with an earlier version of Oracle, then you could be using dictionary managed tablespaces. For a tablespace that uses the data dictionary to manage its extents, Oracle updates the appropriate tables in the data dictionary whenever an extent is allocated or freed for reuse. Oracle also stores rollback information about each update of the dictionary tables. Because dictionary tables and rollback segments are part of the database, the space that they occupy is subject to the same space management operations as all other data.
Lcaolly Managed Tablesapce_
A tablespace that manages its own extents maintains a bitmap in each datafile to keep track of the free or used status of blocks in that datafile. Each bit in the bitmap corresponds to a block or a group of blocks. When an extent is allocated or freed for reuse, Oracle changes the bitmap values to show the new status of the blocks. These changes do not generate rollback information because they do not update tables in the data dictionary (except for special cases such as tablespace quota information).
Locally managed tablespaces have the following advantages over dictionary managed tablespaces:
Local management of extents automatically tracks adjacent free space, eliminating the need to coalesce free extents.
Local management of extents avoids recursive space management operations. Such recursive operations can occur in dictionary managed tablespaces if consuming or releasing space in an extent results in another operation that consumes or releases space in a data dictionary table or rollback segment.
The sizes of extents that are managed locally can be determined automatically by the system. Alternatively, all extents can have the same size in a locally managed tablespace and override object storage options.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/physical.htm#sthref518
Regards

My ipod wont update any apps, it says something about storage managment but i have 4 gigs left and all of my iclous storage left. Is their ayway to fix this

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it says something about storage management
Try these support articles...
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Two questions about Risk Management 2.0

hi experts,
Please find below two questions about Risk Management:
-In SPRO, Risk Management>Create top node: after completing information and executing I have this error:
Error in the ABAP Application Program
The current ABAP program "/ORM/ORM_CREATE_TOP_NODES" had to be terminated
because it has
come across a statement that unfortunately cannot be executed.
The following syntax error occurred in program "/ORM/SAPLORM_API_SERVICES " in
include "/ORM/LORM_API_SERVICESU10 " in
line 97:
"Bei PERFORM bzw. CALL FUNCTION "GET_ORGUNIT_THRESHOLDS" ist der Aktual"
"parameter "I_ORGUNIT_ID" zum Formalparameter "IV_ORGUNIT_ID" inkompati"
"bel."
The include has been created and last changed by:
Created by: "SAP "
Last changed by: "SAP "
Error in the ABAP Application Program
The current ABAP program "/ORM/ORM_CREATE_TOP_NODES" had to be terminated
because it has
come across a statement that unfortunately cannot be executed.
Do you know where it could come from?
-On the Portal>Risk Management
when I click in a link under the risk management menu(activities and risks, risk report, document risk,...) i alway have an internal server error:
While processing the current request, an exception occured which could not be handled by the application or the framework.
If the information contained on this page doesn't help you to find and correct the cause of the problem, please contact your system administrator. To facilitate analysis of the problem, keep a copy of this error page. Hint: Most browsers allow to select all content, copy it and then paste it into an empty document (e.g. email or simple text file).
Do we have to set up some customizing points before accessing these links?
Thank you !
Regards,
Julien

Hi Julien ,
I have the same error what u described as :-
-On the Portal>Risk Management
when I click in a link under the risk management menu(activities and risks, risk report, document risk,...) i alway have an internal server error:
While processing the current request, an exception occured which could not be handled by the application or the framework.
If the information contained on this page doesn't help you to find and correct the cause of the problem, please contact your system administrator. To facilitate analysis of the problem, keep a copy of this error page. Hint: Most browsers allow to select all content, copy it and then paste it into an empty document (e.g. email or simple text file).
Do we have to set up some customizing points before accessing these links? "
Are you able to solve this. Please let me know how to resolve this???
Thanks
Regards,
Atul

Problem about space management of archived log files

Dear friends,
I have a problem about space management of archived log files.
my database is Oracle 10g release 1 running in archivelog mode. I use OEM(web based) to config all the backup and recovery settings.
I config "Flash Recovery Area" to do backup and recovery automatically. my daily backup schedule is every night at 2:00am. and my backup setting is "disk settings"--"compressed backup set". the following is the RMAN script:
Daily Script:
run {
allocate channel oem_disk_backup device type disk;
recover copy of database with tag 'ORA$OEM_LEVEL_0';
backup incremental level 1 cumulative copies=1 for recover of copy with tag 'ORA$OEM_LEVEL_0' database;
the retention policy is the second choice, that is "Retain backups that are necessary for a recovery to any time within the specified number of days (point-in-time recovery)". the recovery window is 1 day.
I assign enough space for flash recovery area. my database size is about 2G. I assign 20G as flash recovery area.
now here is the problem, through oracle online manual, it said oracle can manage the flash recovery area automatically, that is, when the space is full, it can delete the obsolete archived log files. but in fact, it never works! whenever the space is full, the database will hang up! besides, the status of archived log files is very strange, for example, it can change "obsolete" stauts from "yes" to "no", and then from "no" to "yes". I really have no idea about this! even though I know oracle usually keep archived files for some longer days than retention policy, but I really don't know why the obsolete status can change automatically. although I can write a schedule job to delete obsolete archived files every day, but I just want to know the reason. my goal is to backup all the files on disk and let oracle automatically manage them.
also, there is another problem about archive mode. I have two oracle 10g databases(release one), the size of db1 is more than 20G, the size of db2 is about 2G. both of them have the same backup and recovery policy, except I assign more flash recovery area for db1. both of them are on archive mode. both of nearly nobody access except for the schedule backup job and sometime I will admin through oem. the strange thing is that the number of archived log files of smaller database, db2, are much bigger than ones of bigger database. also the same situation for the size of the flashback logs for point-in-time recovery. (I enable flashback logging for fast database point-in-time recovery, the flashback retention time is 24 hours.) I found the memory utility of smaller database is higher than bigger database. nearly all the time the smaller database's memory utility keeps more than 99%. while the bigger one's memory utility keeps about 97%. (I enable "Automatic Shared Memory Management" on both databases.) but both database's cup and queue are very low. I'm nearly sure no one hack the databases. so I really have no idea why the same backup and recovery policy will result so different result, especially the smaller one produces more redo logs than bigger one. does there anyone happen to know the reason or how should I do to check the reason?
by the way, I found web based OEM can't reflect the correct database status when the database shutdown abnormally. for example, if the database hang up because of out of flash recovery area, after I assign more flash recovery area space and then restart the database, the OEM usually can't reflect the correct database status. I must restart OEM manually to correctly reflect the current database status. does there anyone know in what situation I should restart OEM to reflect the correct database status?
sorry for the long message, I just want to describe in details to easy diagnosis.
any hint will be greatly appreciated!
Sammy

thank you very much, in fact, my site's oracle never works about managing archive files automatically although I have tried all my best. at last, I made a job running daily to check the archive files and delete them.
thanks again.

Create table with storage parameters in a locally managed tablespace

Hi,
Can we create object with storage parameters in a locally managed tablespace.
CREATE TABLE my_hash_table_6 (
name VARCHAR2(30),
value VARCHAR2(4000) )
STORAGE (
INITIAL 1M
NEXT 512K
PCTINCREASE 0
MINEXTENTS 2
MAXEXTENTS UNLIMITED )
users default tablespace is locallly managed.
Then this table's extent management will be managed as per the tablespace or as the storage parameters which
were specified at the time of table creation.

Why don't you try it yourself ?
TEST@db102 > select * from dba_tablespaces
2 where TABLESPACE_NAME='USERS';
TABLESPACE_NAME                BLOCK_SIZE INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS
MAX_EXTENTS PCT_INCREASE MIN_EXTLEN STATUS    CONTENTS LOGGING   FOR EXTENT_MAN
ALLOCATIO PLU SEGMEN DEF_TAB_ RETENTION   BIG
USERS                                8192          65536                       1
2147483645                   65536 ONLINE    PERMANENT LOGGING   NO LOCAL
SYSTEM    NO AUTO   DISABLED NOT APPLY   NO
TEST@db102 > CREATE TABLE my_hash_table_6 (
2 name VARCHAR2(30),
3 value VARCHAR2(4000) )
4 STORAGE (
5 INITIAL 1M
6 NEXT 512K
7 PCTINCREASE 0
8 MINEXTENTS 2
9* MAXEXTENTS UNLIMITED )
TEST@db102 > /
Table created.
TEST@db102 > select * from user_segments
2 where segment_name='MY_HASH_TABLE_6';
SEGMENT_NAME
PARTITION_NAME                 SEGMENT_TYPE       TABLESPACE_NAME
     BYTES     BLOCKS    EXTENTS INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS
MAX_EXTENTS PCT_INCREASE FREELISTS FREELIST_GROUPS BUFFER_
MY_HASH_TABLE_6
                               TABLE              USERS
   2097152        256          2        1572864                       1
2147483645                                         DEFAULT
TEST@db102 >

Extract information about Travel Management

Hi !!
I need to work on extractor to get information about Travel Management, the user's need to know how much the company spend on travel.
I read some documentation about 0FI_TV_01 and 0FI_TV_02, But I don´t know where I can get more information about how to activate this extractor's and how work on R/3 and connect with BW (7.0)
At this time I konw how work 2LIS_02_ITM and how this extractor was configured and activated on R/3 Systems and their connection with BW.
Please, If you know some documentation or you can send me one tutorial about this extractors, just let me know
I will assign points to you.
Thank you.
Alice

Alice,
My working week is Sunday -Thursday.
It is true that you can see if an extractor is delta-enabled by looking at the table value. It is also apparent in the info-package.
However, the value in the table is not the reason why the extractor is delta-enabled. There is an extractor program which handles the extraction, which, for these extractors have been programmed for full extraction.
Delta extraction in principle is programmed based on certain fields like a change/creation date. Sometimes the business process i.e 'management of the travel scenario' may not be readily amenable to programming data-extraction.
In short, you do not have a quick solution for making these extractors delta-enabled.
There has been some discussion in this forum on the concept of pseudo-delta - take a look at the link below:
Pseudo delta
BR/
Mathew.
Edited by: Mathew Muthalaly on Apr 6, 2008 6:59 AM

Information about Performance manager's APIs

Hi All, I require some information about Performance Manager of Business Objects XI R2. Business Objects provides APIs for BOE server, Web Services for customization, as that of, is there any APIs available for Performance Manager (for customization)? Can we customize the performance Manager as per requirements? Please let me know your views & finding on this topic. Thanks

Hi John, From the output you shared it looks like you using Performance Advisor and want to share a graph of a 7-mode system. The instructions link you shared is from Performance Manager which is for Clustered Data ONTAP only. In the Performance Advisor there is unfortunately no way to share a link. You can 'save as' to png as you probably already saw, or you can use the dfm CLI to generate the same and email, perhaps as a daily report. There is also a data collector that will post to the NetApp ToolChest that submits data to Graphite with dashboards in Grafana. This solution would allow sharing of a URL like you desire. If you want more info on this let me know. Kind Regards,Chris MaddenStorage Architect, NetApp

Need Info About Document Management System

Hi All,
I need information about Document Management system.
How it is linked with KM
Thanks
Arun

Hi Arun,
DMS is available in R/3 Systems as a individual module and can be linked with KM using DMS Connector for KM. Find the links below..
Check this out...
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/30/08a037b9e62417e10000009b38f889/frameset.htm">DMS</a>
<a href="https://www.sdn.sap.com/irj/sdn/thread?threadID=26682">Thread 1</a>
<a href="https://www.sdn.sap.com/irj/sdn/thread?threadID=235959">Thread 2</a>
Hope this helps.
Regards,
Venkat.

Roblem about space management of archived log files

Dear friends,
I have a problem about space management of archived log files.
my database is Oracle 10g release 1 running in archivelog mode. I use OEM(web based) to config all the backup and recovery settings.
I config "Flash Recovery Area" to do backup and recovery automatically. my daily backup schedule is every night at 2:00am. and my backup setting is "disk settings"--"compressed backup set". the following is the RMAN script:
Daily Script:
run {
allocate channel oem_disk_backup device type disk;
recover copy of database with tag 'ORA$OEM_LEVEL_0';
backup incremental level 1 cumulative copies=1 for recover of copy with tag 'ORA$OEM_LEVEL_0' database;
the retention policy is the second choice, that is "Retain backups that are necessary for a recovery to any time within the specified number of days (point-in-time recovery)". the recovery window is 1 day.
I assign enough space for flash recovery area. my database size is about 2G. I assign 20G as flash recovery area.
now here is the problem, through oracle online manual, it said oracle can manage the flash recovery area automatically, that is, when the space is full, it can delete the obsolete archived log files. but in fact, it never works! whenever the space is full, the database will hang up! besides, the status of archived log files is very strange, for example, it can change "obsolete" stauts from "yes" to "no", and then from "no" to "yes". I really have no idea about this! even though I know oracle usually keep archived files for some longer days than retention policy, but I really don't know why the obsolete status can change automatically. although I can write a schedule job to delete obsolete archived files every day, but I just want to know the reason. my goal is to backup all the files on disk and let oracle automatically manage them.
also, there is another problem about archive mode. I have two oracle 10g databases(release one), the size of db1 is more than 20G, the size of db2 is about 2G. both of them have the same backup and recovery policy, except I assign more flash recovery area for db1. both of them are on archive mode. both of nearly nobody access except for the schedule backup job and sometime I will admin through oem. the strange thing is that the number of archived log files of smaller database, db2, are much bigger than ones of bigger database. also the same situation for the size of the flashback logs for point-in-time recovery. (I enable flashback logging for fast database point-in-time recovery, the flashback retention time is 24 hours.) I found the memory utility of smaller database is higher than bigger database. nearly all the time the smaller database's memory utility keeps more than 99%. while the bigger one's memory utility keeps about 97%. (I enable "Automatic Shared Memory Management" on both databases.) but both database's cup and queue are very low. I'm nearly sure no one hack the databases. so I really have no idea why the same backup and recovery policy will result so different result, especially the smaller one produces more redo logs than bigger one. does there anyone happen to know the reason or how should I do to check the reason?
by the way, I found web based OEM can't reflect the correct database status when the database shutdown abnormally. for example, if the database hang up because of out of flash recovery area, after I assign more flash recovery area space and then restart the database, the OEM usually can't reflect the correct database status. I must restart OEM manually to correctly reflect the current database status. does there anyone know in what situation I should restart OEM to reflect the correct database status?
sorry for the long message, I just want to describe in details to easy diagnosis.
any hint will be greatly appreciated!
Sammy

thank you very much, in fact, my site's oracle never works about managing archive files automatically although I have tried all my best. at last, I made a job running daily to check the archive files and delete them.
thanks again.

Default storage for locally managed tablespaces

the documentation says you cannot have a default storage parameter for locally managed tablespaces. Does this mean that we cannot specify
INITIAL
NEXT
PCTINCREASE
MINEXTENTS
MAXEXTENTS for such tablespaces, or is there another way we can, without using default storage?
thanks

I amnot sure where you read that part that the default storage clause can't be given.Please see here,
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/tspaces.htm#sthref1149
From the doc,
Creating a Locally Managed Tablespace
If the CREATE TABLESPACE statement includes a DEFAULT storage clause, then the database considers the following:
If you specified the MINIMUM EXTENT clause, the database evaluates whether the values of MINIMUM EXTENT, INITIAL, and NEXT are equal and the value of PCTINCREASE is 0. If so, the database creates a locally managed uniform tablespace with extent size = INITIAL. If the MINIMUM EXTENT, INITIAL, and NEXT parameters are not equal, or if PCTINCREASE is not 0, the database ignores any extent storage parameters you may specify and creates a locally managed, autoallocated tablespace.
If you did not specify MINIMUM EXTENT clause, the database evaluates only whether the storage values of INITIAL and NEXT are equal and PCTINCREASE is 0. If so, the tablespace is locally managed and uniform. Otherwise, the tablespace is locally managed and autoallocated.
HTH
Aman....

Questio about ASSM managed tablespaces?

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