SYSTEM table space is critical

Hi,
Generally we will not add any datafiles for UNDO table space because it is oracle managed tablespace.For SYSTEM table shall I add datafile if it reaches threshold value or not?
Regards,
ARNS.

Hi,
Normally there is no need to increase the SYSTEM table space.The SYSTEM tablespace should only contain system-relevant data (such as the Oracle Dictionary).If you do not specify a 'Default Permanent Tablespace' when you create the database, the SYSTEM tablespace automatically assumes this role.May be this is happening in your case.
The size of the Oracle Dictionary in the SYSTEM tablespace stabilizes over time. The AWR (Automatic Workload Repository) in the SYSAUX tablespace also becomes relatively fixed in size after a certain time, depending on the retention period. The SYSTEM and SYSAUX tablespaces therefore remain relatively stable in terms of size in the longer term.
Application data, on the other hand, is not stable, and usually grows in size. If user data is stored in the SYSTEM or SYSAUX tablespaces, these two tablespaces may continue to grow in an uncontrolled manner. Time-consuming reorganization is then required at a later stage to correct this.
If non-system database users use the SYSTEM tablespace to save their data, this may also cause the database performance to degrade. The following security problem also arises: If non-system database users store their data in the SYSTEM tablespace, the entire space in the SYSTEM tablespace may be occupied, which means that the database can no longer function. In terms of system availability, you should therefore always ensure that a tablespace other than SYSTEM or SYSAUX is defined as the special Default Permanent Tablespace.
Award points if useful.
Phani

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Performance impact due to IO r/w on system table space

I see lot of IO on our system tablespace/datafiles always even though there is negligible user activity on the database? What could be the possible cause for this?
Because of this, the server is getting lot of IOWAITS.
Any suggestions please? Thanks.

There are two things here, first AWR is valid only for 10g, and second, so the only most suitable monitoring tool you have is the classical Statspack.
On the other hand if you don't have a temporary tablespace there will be no error, but your system will be used for temporary purposes, which is a very bad practice, as you have seen. I reccomend you, once you have detected this issue, create a temporary tablespace and make sure all users are defined to point temporary segments to that temp tablespace.
~ Madrid.

Why the size of system table space is limited to 16383MB

Hi,
I am using 10.2.0.3.0 on linux 64 bit
I want to find out that why size of sysaux tablespace datafile is limited to 16383MB as shown in Enterprose manager, i am using 64 bit linux
sysaux tablespace
File Size (KB) 716800
AutoExtend Yes
Increment 10240KB
Maximum File Size 16383MB
Maximum File Size 16383MB

Hi,
4194304 * 4096 = 17179869184 = 16384GB (4096 = database block size)
Come sir..
Name Abbr. Size
Kilo K 2^10 = 1,024
Mega M 2^20 = 1,048,576
Giga G 2^30 = 1,073,741,824
Tera T 2^40 = 1,099,511,627,776
Peta P 2^50 = 1,125,899,906,842,624
Exa E 2^60 = 1,152,921,504,606,846,976
Zetta Z 2^70 = 1,180,591,620,717,411,303,424
Yotta Y 2^80 = 1,208,925,819,614,629,174,706,176
Now, 1 MB = 1,048,576 * 4= 419304 (4 MB Block Size)
4 MB Block Size * database Block Size (4096) = 17179869184 Kilo Bytes
17179869184 /1024/ 1024 = 16384 GB
Got it
- Pavan Kumar

Free space showing in Table space but not updated on os file system.

Hi Support,
I am using oracle 10.2.0.4.0 in ECC6.0. OS is Solaris 10 (Linux).
We deleted all xml messages from my PI/XI server. its successfully deleted even table space showing free space almost 400GB in DB02 and from brtools also. But from OS side OS file system not showing free space,
Is any body know about this issue???? do i need to reboot system or any other solution.
Thanks,
Kazi Faizan.

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Swap space becomes critically low in the system

Hi,
We are facing a situation where the swap space space is critically low in the system, there is just 10 % available swap space in the system
And we can't see the swap space being released to the OS .
This is one of the Application servers we have for R3 system.
SAP environment:
SAP Netweaver 7.01
LINUX RHEL
Oracle 11g
$free -m //outut
As you can see we have 64G physical memory allocated to this application server whereas the configured swap space is around 20G.
This Linux box houses two application server one for R3 and the other for CRM.
Would appreciate if you can tell me what should be done to release the swap space as above shows that 18 gig of 20 is being used right now.
Regards,
Rakesh

Thanks Gaurav..
what you have said makes sense we will check that parameter which determines to what extent swap space should be used between 0 to 100 %.
However, I have found that there are many swaps in the SAP buffer (ST02) that we will be tuning soon in both of the application servers that I had mentioned above,
I have checked the ST06 and couldn't found any page in/out activity.
see below the screen shots of ST02 and ST06 for both application servers.
Regards,
Rakesh

Scattering Data Across Table Space

Hi Guys,
We have System Performance team who checks the performance of our product .As per them there are few tables which they are concurrently updating(For the performance check) and due to being the tables in the same table space the insert is taking long time and CPU wait spikes under high concurrent user load.
I am wondering is it the problem of many tables in the same table space or some thing differernt.
We are using Oracle 11g Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production.
Please share any ideas or thoughts if any body has encountered this problem already.
Thanks in advance.
Regards,
Papi

957590 wrote:
We have System Performance team who checks the performance of our product .As per them there are few tables which they are concurrently updating(For the performance check) and due to being the tables in the same table space the insert is taking long time and CPU wait spikes under high concurrent user load.
I am wondering is it the problem of many tables in the same table space or some thing differernt.
Your performance team haven't told you enough about what they're doing to give you any sensible ideas about their problem.
If we assume that they understand nearly everything they're doing, and are looking in the right place at the right time, then there is a possibility that their problem is too much activity on a single tablespace, but the problem would be platform dependent and also be affected by the Oracle configuration.
Assume that they are using a file system for the Oracle data files, have just one file for the critical tablespace, and have configured multiple db writers (or writer slaves) and aren't using the O/S direct I/O and async features (which typically means they've not set Oracle's parameter filesystem_io_options to "setall") then they could be seeing inode contention for the relevant file and that could result in lots of CPU spinning. (At the file system level, readers block writers, writers block readers).
If you want to start understanding what their problem is, get them to show you an AWR report generated over a short interval, and get them to explain exactly what their test was doing in that interval.
Regards
Jonathan Lewis

Table space not getting cleaned after using free method (permanent delete)

Hi ,
We are using the free method of the LIB OBJ, to permanently delete the objects. As per documentation, the ContentGarbageCollectionAgent will be cleaning the database which runs in a scheduled mode. But the log of that ContentGargabageCollectionAsgent shows, all zero for objects without reference, objects cleared,etc. I.e the table space remains the same before and after deleteing all the contents in the cmsdk database. But the agent is running as per the schedule but just comes out doing nothing.
Can anbody put some light on this issue.
thanks
Raj.

Hi Matt,
Thanks for replying. It's been a very long time waiting for you ;)
---"Are you running the 9.2.0.1, 9.2.0.2, or 9.2.0.3 version of the Database?"
we are using 9.2.0.1
---"If you installed the CM SDK schema in the "users" tablespace ......."
Yes we are using USERS tablespace for our Development.
I ran the query. The result is:
SYSTEM MANUAL NOT AFFECTED
USERS MANUAL NOT AFFECTED
CTXSYS_DATA MANUAL NOT AFFECTED
CMSDK1_DATA MANUAL NOT AFFECTED
(USERS belongs to develpoment cmsdk schema. And CMSDK1 for Prod CMSDK schema)
From the results I see only "Manual", but still I don't see the tablespace size being coming down. Both table space sizes (USER and CMSDK1) always grows higher and higher.
Also to let you know, We use ORACLE EM Console (Standalone) application to see the oracle databse information online. Will there be any thing to do with the tool we use to see the table space sizes. We make sure we always refresh it before making a note.
So is there anything else I can see. Once I saw the ContentGarbageCollection agent to free 1025 objects and deleted 0 objects. But I don't see any change in the table space size. I am little confused b/w freed and deleted.
thanks once again for your response Matt.
-Raj.

A sample code to check records of a system table?

hi ABAP4 experts,
We are pretty new at ABAP4. We would be appreciated if you can provide a sample code to check how many records and calculate a total amount for a specific field, e.g., DMBTR in a system table, e.g., BSEG. Note: there is no any selection for this table BSEG, we just want to get the total record count in this table and also the total amount for a specific field e.g. DMBTR in this table.
Do we have to use an internal table to transfer all the records of BSEG into the internal table to get the result?
We will give you reward points!

Hi Kevin,
Using SUM directly in SQL will NOT work for table BSEG because BSEG is pool table. You will get an ABAP error.
"Aggregate functions and the addition DISTINCT are not supported in field lists for pooled and cluster tables".
You need an internal table to transfer all data from BSEG and perform calculation for count and sum.
Concerning about performance running perhaps you can code something like this.
REPORT ZZFLTEST NO STANDARD PAGE HEADING.
TABLES: BSEG.
DATA: CURS          TYPE CURSOR,
      PACKAGE_SIZE LIKE RMCS4-MC_CM_PSIZE VALUE '10000'.
DATA: BEGIN OF I_BSEG OCCURS 0,
        BELNR TYPE BSEG-BELNR,
        BURKS TYPE BSEG-BURKS,
        GJAHR TYPE BSEG-GJAHR,
        BUZEI TYPE BSEG-BUZEI,
        DMBTR TYPE BSEG-DMBTR,
        SHKZG TYPE BSEG-SHKZG.
DATA: END OF I_BSEG.
DATA: TOT_DMBTR TYPE BSEG-DMBTR,
      TOT_REC   TYPE I.
SELECTION-SCREEN BEGIN OF BLOCK B01 WITH FRAME TITLE TEXT-001.
SELECTION-SCREEN SKIP.
PARAMETERS: P_SIZE LIKE RMCS4-MC_CM_PSIZE DEFAULT '10000'.
SELECTION-SCREEN SKIP.
SELECTION-SCREEN END OF BLOCK B01.
START-OF-SELECTION.
PACKAGE_SIZE = P_SIZE.
OPEN CURSOR WITH HOLD CURS FOR
SELECT BELNR BURKS GJAHR BUZEI DMBTR SHKZG
FROM BSEG
WHERE BELNR <> SPACE
    AND BURKS <> SPACE
    AND GJAHR <> SPACE
    AND BUZEI <> SPACE.
*Fetch internal table I_BSEG for every 10000 records.
DO.
    FETCH NEXT CURSOR CURS
    INTO TABLE I_BSEG PACKAGE SIZE PACKAGE_SIZE.
    IF SY-SUBRC <> 0.
      EXIT.
    ENDIF.
ENDDO.
CLOSE CURSOR CURS.
LOOP AT I_BSEG.
    TOT_REC = TOT_REC + 1.
    IF I_BSEG-SHKZG = 'S'.
      TOT_DMBTR = TOT_DMBRT + I_BSEG-DMBTR * -1.
    ELSE.
      TOT_DMBTR = TOT_DMBTR + I_BSEG-DMBTR.
    ENDIF.
ENDLOOP.
WRITE: / 'TOTAL BSEG-DMBTR:', TOT_DMBTR,
         / 'TOTAL RECORD:    ', TOT_REC.
END-OF-SELECTION.
Hope this will help.
Regards,
Ferry Lianto

BRtools table space creation error

hi,
Iam trying to create new table space in my R/3 system. When i went to brtools - space management sytem throwing error owner failed.I tried with all users to login like ( <SID>adm,administrator etc ...)even then same problem.Could you please suggest how to create table space with what login id
Error:
Main options for creation of tablespace in database WA6
1 - Tablespace name (tablespace) ......... [PSAPECDATA]
2 - Tablespace contents (contents) ....... [data]
3 - Segment space management (space) ..... [auto]
4 - SAP owner of tablespace (owner) ...... [EC5ADM]
5 - Data type in tablespace (data) ....... [both]
6 # Joined index/table tablespace (join) . []
Standard keys: c - cont, b - back, s - stop, r - refr, h - help
BR0662I Enter your choice:
c
BR0280I BRSPACE time stamp: 2006-06-14 21.08.45
BR0663I Your choice: 'c'
BR0259I Program execution will be continued...
BR0824E Owner EC5ADM not found in database or not SAP owner
BR0691E Checking input value for 'owner' failed
BR0669I Cannot continue due to previous warnings or errors - you can go back to
repeat the last action
BR0280I BRSPACE time stamp: 2006-06-14 21.08.45
BR0671I Enter 'b[ack]' to go back, 's[top]' to abort:
Please suggest.
- Cheers

Login as ora<sid> and run brtools. Tablespace owner will be SAP<SID> or SAPR3 depends upon your version.
Thanks
Prince

Table space not reduce after delete in oracle 10g

Hi..
Based on my system, i have found that my oracle table space did not reduce after the deletion query. Why ?.. Could somebody help me. As your info, I am using oracle 10g.
Thank you,
Baharin

After Delete the table space will not be set free. high water mark will not be reset. to regain the space you need to recognize the objects from which you deleted the data. This can be done in many ways.
1) Move the objects.
Alter table temp move --> optionally tablespace clause can be used. After this you need to rebuild table indexes.
2) With 10g table can be shrinked or reorganize to free the space.
alter table mytable enable row movement;
alter table mytable shrink space;
3) Export/Import
export the objects and drop and recreate with import.

Table space need to be increased in every week..

Dear Experts,
We are facing a new problem .
The problem is like , Last 6 months back we had done the Hard-ware migration. After
migration we need to increase the table space in every 10 days. But before migration , the table
space was getting ing increased in every 45 days.
In this way , we dont have much space left with us..
I am not able to analyse the issue ...
Please suggest .. What to check and necessary action ...
Thanks,
Sanjana

Hi,
Thank you for the response. Yes , the hord-ware migration is not linked with this issue. But this is happening after migration . So I was thinking , if any setting might have changed or something like that .
Deleting all the redundant data in system means , it should run regaularly. And Now new developments have gone to production.
And the data loads are carrying almost same amount of data. Only 2 changes, Material Master was coming on DELTA , Now its Coming on FULL Load. Rest all loads are same as before migration.
Kindly suggest.
Thanks,
Sanjana

How to Access Table Space Map in Oracle 10g OEM

How and from where to Access Table Space Map in Oracle 10g OEM ??
Thanks

Hi,
first of all, the online help system of grid control is outstanding. Just click on Help in the upper right corner and enter "Tablespace Extent Map" in the search form.
Result:
Show Tablespace Contents Page
Each Oracle database is divided into one or more logical units called tablespaces. You can use Oracle Enterprise Manager to manage these tablespaces and create or modify the parameters for the tablespaces. Use the Tablespace property sheet to set general and storage information for the specified tablespace.
Use the Show Tablespace Contents page to display the list of tablespace segments that comprise the existing tablespace. You can display Tablespace Extents by choosing Show Tablespace Extent Map at the bottom of the page. An extent is a logical unit of database storage space allocation made up of a number of contiguous data blocks. One or more extents in turn make up a segment. When the existing space in a segment is completely used, Oracle allocates a new extent for the segment.
You can view segment extents by clicking on the link in the Extents column to display the Extents in Segments page.
You can display the Show Tablespace Contents page by choosing Show Tablespace Contents from the command drop down list on the Tablespace property page, the Tablespace View page, or the Tablespace search results page.
Note: Developers could only display the tablespace map to a maximum hard coded number of 30,000 extents. Tablespaces are often larger than that. If a tablespace is larger than 30,000 extents, the portion over that is displayed as Unmapped. To avoid exceeding the memory capacity of the tablespace map and to display the map without unmapped extents, use a search criteria displaying results of less than 30K extents.
For an overview of tablespaces, see the "Overview of Tablespaces " chapter of the Oracle Database Concepts Guide.
For more information about managing tablespaces, see the " Managing Tablespaces" chapter of the Oracle Database Administrators Guide.
For more information about managing datafiles, see the " Managing Datafiles and Tempfiles" chapter of the Oracle Database Administrator's Guide.

How to verify reused table space in oracle 10g ?

Hi..
From my system, i have seen that the table size keep increasing event the delete query is running. Due to that, I would to check either the oracle allowed to reuse the table space or not ? if not then how could i enable it ?
Please help me..
Thank you,
Baharin

You can use dbms_space.space_usage to check the for free space.
Space reuse will depend on whether you are using MSSM or ASSM, PCT_FREE, PCT_USED, and how new data is inserted ?
You can shrink or move the table and rebuild indexes to reclaim space.

Percentage of used table space not reduce after deletion

Hi..
This is my query to delete data from database:-
delete from $tb_data where to_char(partition_dt,'MON') = '$mm';
The $tb_data and $mm is variable and the $tb_data will be read input table name (as example backup_nx160, backup_ngn and etc) and the $mm will be capture the input month.
My question is why the percentage of used table space is not reduce after delete query was executed. Could somebody help me..
Please help me..
Thank you,
Baharin

baharin wrote:
Hi..
Is it the deleted space will be reused by the system ?Yes.
.. How could i check the real free tablespace or real usage table space ?If you have gathered statistics on the schema recently, then sum (avg_row_len*num_rows) should give you the exact number of bytes that are being consumed - assuming all tables are in a single tablespace under consideration. You can subtract this value from sum (dba_data_files.bytes) figure for the tablespace, to know exact free space.

SYSTEM table space is critical

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