Segment space for Manual tablespace management

Hi,
wanted to know if 10g segment advisor can advise on segments that exsists in a tablespaces that is set to manual extent management.
thanks,
Ven.

From the
Oracle® Database Administrator's Guide
10g Release 2 (10.2)
Part Number B14231-01
14 Managing Space for Schema Objects
Understanding Reclaimable Unused Space
You use the Segment Advisor to identify segments that would benefit from online segment shrink. Only segments in locally managed tablespaces with automatic segment space management (ASSM) are eligible. Other restrictions on segment type exist. For more information, see "Shrinking Database Segments Online".

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

How to change segment space management (to manual)

How do I change the segment space management for a tablespace, from auto to manual
I can find documentation, to create tablespaces, and set them to auto, but nothing yet to change them from auto to manual.

I just found out, that I am confusing 2 subjects here: segment space management, and auto extensibility. My apologies ....... still new with Oracle :-o
Ok, to change autoextend to manual, do I do this on data_file level ? Do I only need to change this on the last datafile of a tablespace ?

Manual segment space management / want to shrink through segment advisor

I am trying to free space from table space , but i can't check the manual segment space manageme tablespaces, only auto segment space management allow me to do so. How i can do that?
any suggestions.

sybrand_b wrote:
Confusion can best be resolved by referring to the official documentation (as opposed to cluttering up this forum full of doc questions with further doc questions).
Is there any particular reason (your boss beats you up when he sees you reading documentation) why you can't be bothered to visit http://tahiti.oracle.com, or do you -mistakingly- think this is an online chatroom, instead of an offline forum?
Sybrand Bakker
Senior Oracle DBAwhat kind of an answer is that? I mean, what is the points of books if docs were everything one ever needed? I have read something in a book that confuses me, and I disagree with, but maybe my understanding is wrong, so that is why I am come here to ask others for their opinion. What is wrong with that?

Change SEGMENT SPACE MANAGEMENT from manual toAUTO

Hi, how can i to alter tablespace to SEGMENT SPACE MANAGEMENT AUTO ?
only with re-create the tablespace ?
regards
MDF

Hi,
Oracle says :
Your specification at tablespace creation time of your method for managing available space in segments, applies to all segments subsequently created in the tablespace. Also, your choice of method cannot be subsequently altered. Only permanent, locally managed tablespaces can specify automatic segment-space management.
Paolo

Segment space management

hai experts
can anyone tell me the reason why system tablespace's segment space management is manual. any link for the description

thanks Jonathan Ferreira
want to know why manual management is made as
default for system tablespace
hen auto space management will reduce the burden of a
DBA and make space management easyIf I had to make a guess, I would suggest that since the system tablespace contains rollback (undo) segments, ASSM cannot be used. With ASSM, the extent size starts small (64KB) and grows to 1MB, 8MB, etc. as additional extents are added to segments.
Since regular users should not be using the SYSTEM tablespace for inserts/updates/undo, there should be minimal burden for the DBA in managing that tablespace.
Charles Hooper
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.

Conversion to segment space management auto

My production databases is 10gR2, tablespaces are created locally managed with segment space management manual.
I wanted to change the segment space management to AUTO.
What is the best way to do this keeping the downtime minimal?
Thanks
S~

A summary.
First, you cannot convert to ASSM. The only mechanism provided is to create a new tablespace with segment space management auto and then move all objects across from their existing tablespace. That is the only conversion mechanism provided or possible.
Second, you probably don't want to convert to ASSM anyway. It is designed to resolve the problem of massive contention for hot blocks on inserts -the kind of thing that will happen in a RAC. In a RAC, ASSM is extremely good news and you'd be mad NOT to use it. But if you don't have a RAC, then the chances of you needing ASSM are much less. If you find particular segments that suffer from insert contention (the symptoms are lots of buffer busy waits and ITL waits), then move those few segments that need the ASSM treatment into specially-created ASSM tablespaces. But don't go doing bulk converts of things that don't need it!
Third, if you are using OMF and ASM, then that's another situation in which ASSM makes a lot of sense: you're automating everything else anyway, so why not use the automatic 'freelists' mechanism, too?
Fourth, ASSM is about how a table knows where its next insert will take place. Extent Management Local/Uniform is all about how a tablespace allocates chunks of space to segments that need it. Completely different technologies.
Fifth, I would always use extent management auto, because do you know what are the "right" extent sizes to allocate to tables? No, I didn't think so. Oracle can work it out for you, though, with no detriment to you, your tables or your performance levels.
Sixth, back on the topic of ASSM, you might find this article useful:
http://www.dizwell.com/prod/node/541

ASSM (Automatic Segment Space Management)

Hi Folks.
I have a severe problem regarding Buffer Busy Waits.
I have deceided to implement ASSM (Automatic Segment Space Management).
Please assist....is the approch OK & how should i apply this in a existing tablespace (pls also specify the syntax & other constraints that should be taken care of)....
Waiting for reply ... & thanks a lot in advance....

ASSM is a good feature to use, but, you need to kill the culprit instaed of simply MOVING ON.
If creating a new tablespace with ASSM, moving objects from Non-ASSM to the new tablespace is a problem, then, think of the following:
First of all, findout which object type is causing BBW, is it rollback/undo header, undo/rollback block, segment headere or what?
You need to review the P3 value(reason code) of BBW wait event.
Try to review the following dynamic views, before you decide to MOVE on.
v$waitstat (segment header)
v$segment_statistics(read the oracle docs. how to use this view and which parameter need to set in order to enable this feature).
Jaffar

How to identify the SEGMENT SPACE MANAGEMENT is AUTO turned ON

how to identify the SEGMENT SPACE MANAGEMENT is AUTO turned ON for a particular tablespace.

Hello,
Try:
SELECT tablespace_name, file_name, autoextensible
FROM DBA_DATA_FILES
ORDER BY tablespace_name, file_name;Oops, wrong answer, try:
SELECT tablespace_name, segment_space_management
FROM dba_tablespaces
order by tablespace_name;

Difference between extent management and segment space management

Hello,
Could you tell me the difference between extent management and segment space management interms of datablocks?

After 10g, default tablespace is locally managed and with this creation, your segment's spaces are managed "automatically".
Automatic segment space management is onlyt avaliable to locally managed tablespaces.
The logic of the automatic segment space management is;
For instance, we have a rectangle cube which is totally empty (1 extent - 8 segments - 64 block in default). If we enter a new data to our table, data is stored inside this cube with it's information. (default 8k). If our data must be splitted, check row chaining for further information.
At this point, oracle decides which block is filled with the entered data. It automatically fills the emty blocks. You can use this only if your tablespace is locally managed and your segment space managemet is auto.
On the other hand,
If we create dictionary managed tablespace,
Data is stored in "dictionary" (tables in SYS schema). This is a bit slower than locally managed tablespaces. So filling the extents, segments and blocks will be slow too. You need to specify the PCTUSED, FREELISTS, FREELISTS GROUPS for the storage of the data. If segment space managent is auto, you don't need to define those values.
In summary, locally managed tablespaces with automatic segment space management is Oracle's maybe the most important feature. I am not using dictionary managed tablespaces and i advice don't use it either. In the end, this is an upgrade of using segment spaces much more faster, easier and reliable, trustable.
PS: You will need to check "High Water Mark" for automatic segment space management.

How do I get the music back on my iPhone after manually deleting it from the device (to get space for photos/videos)?

How do I get the music back on my iPhone after manually deleting it from the device (to get space for photos/videos)? I can sync with iTunes but it doesn't copy these songs back, even though they still appear in my iTunes library. I can click on the Music link under 'On My Device' in iTunes and the missing songs all appear to still be on the device, but they are not. I normally delete using iTunes and do not have this issue. This time I was out and needed more space to shoot photos and videos so I removed a lot of music from my phone through the Music App.

The songs I'm trying to reload on my phone are on my PC. These we had loaded into iTunes. I can remove them all from the library and then add them all back one by one I imagine. The problem I'm having is that I removed them manually from the phone, they still appear in iTunes music library yet they won't sync. I don't want to take the time to compare the phone to my library, remove from the library what's missing on the phone and then add them all back again. 64GB (mostly music) will take a while.

I connect my ipad it shows in left side of itunes it is commencing sync then it freezes itunes and i have to disconnct it manually then a error message telling me that there is not enough disc space for ipad which is not correct any ideas folks

i connect my ipad it shows in left side of itunes it is commencing sync then it freezes itunes and i have to disconnct it manually then a error message telling me that there is not enough disc space for ipad which is not correct any ideas folks

i have reset the ipad and restored it to no avail

Monitoring Used (%) space for tablespaces

Hi everyone,
I am currently using:
Redhat Linux ES 5 2.6.18 and also
Oracle 10g Release 2 for Linux x86 R10.2.0.3
While monitoring my Tablespaces using OEM Database Control, I notice that two tablespaces were almost full.
[SYSAUX] - Size: 290MB , Used 283MB (97% full)
[SYSTEM] - Size: 320MB, Used 313MB (98% full)
When I try to locate the datafiles of both tablespaces in its directory (/home/dba/oracle/oradata/oracle), it shows the allocated size (290MB for sysaux01.dbf & 320MB for system01.dbf) and not the used space.
I got three questions to ask over here:
1st- Why there isn't any warnings or alarms even though the tablespaces exceeds the critical size?
2nd- How come the datafiles shows the allocated size of the tablespaces and not the Used space?]
3rd- How can I find & monitor the actual used space of the tablespaces?
4th- I have enabled the AutoExtend function but I am worry whether is there any other concern?
I am still very new here.
Please pardon me for anything that is improper.
Looking forward for your expertise, guidance & help.
Thanks for your attention.
-Regards-
++ Kef Lim ++

Hi,
Here you have some scripts:
TABLESPACE USAGE NOTES:
Tablespace Name - Name of the tablespace
Bytes Used - Size of the file in bytes
Bytes Free - Size of free space in bytes
Largest - Largest free space in bytes
Percent Used - Percentage of tablespace that is being used - Careful if it is more than 85%
select     a.TABLESPACE_NAME,
     a.BYTES bytes_used,
     b.BYTES bytes_free,
     b.largest,
     round(((a.BYTES-b.BYTES)/a.BYTES)*100,2) percent_used
from
          select      TABLESPACE_NAME,
               sum(BYTES) BYTES
          from      dba_data_files
          group      by TABLESPACE_NAME
     a,
          select      TABLESPACE_NAME,
               sum(BYTES) BYTES ,
               max(BYTES) largest
          from      dba_free_space
          group      by TABLESPACE_NAME
     b
where      a.TABLESPACE_NAME=b.TABLESPACE_NAME
order      by ((a.BYTES-b.BYTES)/a.BYTES) desc
SET SERVEROUTPUT ON
SET PAGESIZE 1000
SET LINESIZE 255
SET FEEDBACK OFF
PROMPT
PROMPT Tablespaces nearing 0% free
PROMPT ***************************
SELECT a.tablespace_name,
       b.size_kb,
       a.free_kb,
       Trunc((a.free_kb/b.size_kb) * 100) "FREE_%"
FROM   (SELECT tablespace_name,
               Trunc(Sum(bytes)/1024) free_kb
        FROM   dba_free_space
        GROUP BY tablespace_name) a,
       (SELECT tablespace_name,
               Trunc(Sum(bytes)/1024) size_kb
        FROM   dba_data_files
        GROUP BY tablespace_name) b
WHERE a.tablespace_name = b.tablespace_name
AND    Round((a.free_kb/b.size_kb) * 100,2) < 10
PROMPT
SET FEEDBACK ON
SET PAGESIZE 18
Set Termout On
Set Heading On
clear breaks
break on contents -
skip 1
compute Sum of alloc used free nbfrag on contents
column tblsp         format a20 wrap          heading "Tablespace Name"
column Alloc         format 999,999           heading "Alloc|(Mb)"
column Free          format 999,999           heading "Free|(Mb)"
column used          format 999,999           heading "Used|(Mb)"
column pused         format 990.9             heading "%|Used|Space"
column fragmax       format 99,999.9          heading "Largest|Free|Ext.(Mb)"
column nbfrag        format 99999             heading "Nb|frag"
column contents      format a10               heading "Content"
column pct_ext_coal format 999                     heading "% Ext.|Coal."
column ext_manage    format a7 wrap           heading "Ext.|M."
column autoext       format a7 wrap           heading "Auto|Ext."
select
       contents
     , nvl (dt.tablespace_name, nvl (fsp.tablespace_name, 'Unknown')) tblsp
     , alloc
     , alloc - nvl (free, 0)       Used
     , nvl (free, 0)               Free
     , ((alloc - nvl (free, 0)) / alloc) * 100 pused
     , nbfrag
     , fragmax
     , dfsc.pct_ext_coal pct_ext_coal
     , dt.ext_manage
     , df.inc                           autoext
from
       ( select sum (bytes)/1048576     free
              , max (bytes)/1048576     fragmax
              , tablespace_name
              , count(*)                nbfrag
          from sys.dba_free_space
         group by tablespace_name
       ) fsp
    , ( select sum(bytes)/1048576      alloc
              , tablespace_name
              , Decode(((inc * &Var_DB_BLOCK_SIZE)/1024), Null, 'No', 'Yes')     inc
           from sys.dba_data_files sddf
              , sys.filext$        aut
          where sddf.file_id       = aut.file#   (+)
          group by tablespace_name
                 , Decode(((inc * &Var_DB_BLOCK_SIZE)/1024), Null, 'No', 'Yes')
          Union
          select sum(bytes)/1048576      alloc
               , tablespace_name
               , Decode(((increment_by * &Var_DB_BLOCK_SIZE)/1024), Null, 'No', 'Yes')    inc
            from sys.dba_temp_files sddf
           group by tablespace_name
                  , Decode(((increment_by * &Var_DB_BLOCK_SIZE)/1024), Null, 'No', 'Yes')
       ) df
    , ( select contents
              , tablespace_name
              , initial_extent/1024     initial_ext
              , next_extent/1024        next_ext
              , pct_increase
              , max_extents
              , min_extents
              , Substr(extent_management,1,5)       ext_manage
           from dba_tablespaces
       ) dt
     , ( select percent_extents_coalesced    pct_ext_coal
              , tablespace_name
           from dba_free_space_coalesced
       ) dfsc
where
       fsp.tablespace_name (+)   =   dt.tablespace_name
   and
       df.tablespace_name   (+)   =   dt.tablespace_name
   and
       dfsc.tablespace_name (+)   =   dt.tablespace_name
order
    by contents
     , pused desc
;Cheers,
Francisco Munoz Alvarez
http://www.oraclenz.com

I have searched for solutions to the error 13019, but everyone with the problem doe'st manually manage their music like I do. I really don't want to have to sync and gothrough that mess. Help? solution for manually managing videos and music!!

I have searched for solutions to the error 13019, but everyone with the problem doesn't manually manage their music like I do. I really don't want to have to sync and go through that mess. Please Help! solution for manually managing videos and music!!

- Make an appointment at the Genius Bar of an Apple store and hear what they hae to say. It is free.
Apple Retail Store - Genius Bar
you can turn on Assistive Touch it adds the Power and other buttons to the iPods screen. Settings>General>Accessibility>Assistive Touch

Working Space for Color Management...

Hello,
I'm working on a project with a series of still, all of which contain embedded sRGB color profiles (as these images were originally used for a web-based job). This video project will eventually go onto a SD DVD to be displayed on a SD NTSC television. When choosing my working space (for color management), should I use SDTV NTSC (or should I use sRGB and then specify SDTV NTSC in my output setting upon rendering? I'm leaning towards SDTV NTSC as my working space, but since I'm coming at this from a print background in color management, I'm wondering if someone could lend some advice?
Also, what should I select for these options (under Color Settings in Project Settings)...ie. should I or shouldn't I have them checked...
- Linearize Working Space
- Blend Colors Using 1.0 Gamma
Thanks!
Kristin.

> It didn't really touch on "Blend Colors Using 1.0 Gamma" though would I want this checked?
Generally, yes. It helps avoid problems that can occur with inter-layer blending.
> And pretty sure, for what I'm doing, I wouldn't want "Linearize Working Space" checked.
Also correct, unless you intend to work in a 16- or 32-bpc mode.
More information and additional helpful links are on the Help page for these topics:
http://help.adobe.com/en_US/AfterEffects/9.0/WS2A3CEB0E-F1A1-4035-9C62-CFF4A0527B11a.html

Segment space for Manual tablespace management

Similar Messages

Maybe you are looking for