Parameter of auto extend

Hi all,
I want to create tablespace with auto extend but i 'm not sure the size of parameter "next" for the best performance.
Could you pls advise me.
Thank you for advance.
Chara

994105 wrote:
Hi all,
I want to create tablespace with auto extend but i 'm not sure the size of parameter "next" for the best performance.
Could you pls advise me.
Thank you for advance.
Charais tablespace DMT or LMT?
where do you see AUTO EXTEND for tablespace below?
SQL> desc dba_tablespaces
Name                                      Null?    Type
TABLESPACE_NAME                           NOT NULL VARCHAR2(30)
BLOCK_SIZE                                NOT NULL NUMBER
INITIAL_EXTENT                                     NUMBER
NEXT_EXTENT                                        NUMBER
MIN_EXTENTS                               NOT NULL NUMBER
MAX_EXTENTS                                        NUMBER
MAX_SIZE                                           NUMBER
PCT_INCREASE                                       NUMBER
MIN_EXTLEN                                         NUMBER
STATUS                                             VARCHAR2(9)
CONTENTS                                           VARCHAR2(9)
LOGGING                                            VARCHAR2(9)
FORCE_LOGGING                                      VARCHAR2(3)
EXTENT_MANAGEMENT                                  VARCHAR2(10)
ALLOCATION_TYPE                                    VARCHAR2(9)
PLUGGED_IN                                         VARCHAR2(3)
SEGMENT_SPACE_MANAGEMENT                           VARCHAR2(6)
DEF_TAB_COMPRESSION                                VARCHAR2(8)
RETENTION                                          VARCHAR2(11)
BIGFILE                                            VARCHAR2(3)
PREDICATE_EVALUATION                               VARCHAR2(7)
ENCRYPTED                                          VARCHAR2(3)
COMPRESS_FOR                                       VARCHAR2(12)
SQL>

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Auto Extend is on , but maximum file size is 3276MB

Dear Experts,
small Doubt , Auto Extend is on in my DB . it is automaticaly extending the table space when datafile is full , increment size is 10240 KB. but my doubt is what is maximum file size it is showing 3276MB . what happend if we reach there?
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Your datafile max size is set to 3276 mb (3.19GB).
Once your datafile reaches the specified limit, you need to add more space to tablespace by adding additional datafiles.
In your case you can set maxsize to unlimited by altering(For 8k block max size of datafile could be around 32 gb)
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Tablespace created.
Created tablespace with datafile autoextend on and maxsize 1G;
SQL> select file_name,file_id from dba_data_files where tablespace_name='AUTOEXTEND';
FILE_NAME
FILE_ID
+TEST/clonev/datafile/autoextend.1346.790792253
139
SQL> select autoextensible,maxbytes/1024/1024/1024 "G" from dba_data_files where tablespace_name='AUTOEXTEND';
AUT Gb
YES 1
SQL> alter database datafile 139 autoextend on maxsize 2g;
Database altered.
SQL> select autoextensible,maxbytes/1024/1024/1024 "G" from dba_data_files where tablespace_name='AUTOEXTEND';
AUT G
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SQL> alter database datafile 139 autoextend on maxsize unlimited;
Database altered.
SQL> select autoextensible,maxbytes/1024/1024/1024 "G" from dba_data_files where tablespace_name='AUTOEXTEND';
AUT G
YES 31.9999847
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you can check following note
What is The Maximum Datafile Size Limit In Oracle Database 10gR2 [ID 804733.1]

SUM tool unable to detect auto extend and space in DB

Hi SAP,
We have started update on our ECC Dev system using SUM10 SP09 and it showed up an error during extraction phase stating auto extend is not enabled and also insufficient space in DB.
hnpclecd:ecdadm 62> cat SYBSPACE.LOG
SCRIPT SYBSPACE
=================
auto extend feature is not set
Msg 3606, Level 16, State 0:
Server 'ECD', Line 41:
Arithmetic overflow occurred.
======================================================
We have enabled auto extend mode with below commands :
exec sp_dbextend 'set', 'device', ECD_data_001, '10m', '512m'
exec sp_dbextend 'set', 'device', ECD_data_002, '10m', '512m'
exec sp_dbextend 'set', 'device', ECD_log_001, '10m', '512m'
exec sp_dbextend 'set', 'device', ECD_log_002, '10m', '512m'
exec sp_dbextend 'set', 'device', ECD_log_003, '10m', '512m'
exec sp_dbextend 'modify', 'device', 'default', 'growby', '3m'
exec sp_dbextend 'set', 'database', ECD, 'default', '5m'
exec sp_dbextend 'set', 'database', ECD, 'logsegment', '4m', '100m'
exec sp_dbextend 'list', 'database', ECD
And sp_dbextend list also returns appropriate values.
1> exec sp_dbextend 'list', 'device', "ECD%"
2> go
name                                             segment
         item                         value
         status
server-wide                                      (n/a)
         (n/a)                        (n/a)
         enabled
ECD_data_001                                     (n/a)
         growby                       10m
         enabled
ECD_data_001                                     (n/a)
         maxsize                      512m
         enabled
ECD_data_002                                     (n/a)
         growby                       10m
         enabled
ECD_log_001                                      (n/a)
         growby                       10m
         enabled
ECD_log_002                                      (n/a)
         growby                       10m
         enabled
ECD_log_003                                      (n/a)
         growby                       10m
         enabled
(return status = 0)
1>
And sp_helpdb also shows there is enough space available:
device_fragments               size          usage
         created                   free kbytes
ECD_data_001                      90112.0 MB data only
         Feb 5 2014 12:32AM               11653104
ECD_log_001                       10240.0 MB log only
         Feb 5 2014 12:32AM       not applicable
ECD_log_002                        1024.0 MB log only
         Apr 12 2014 6:30PM       not applicable
ECD_log_003                         512.0 MB log only
         Apr 13 2014 1:05AM       not applicable
ECD_log_003                         100.0 MB log only
         Apr 13 2014 1:21PM       not applicable
ECD_data_002                      30720.0 MB data only
         Apr 13 2014 10:14PM               31241520
ECD_log_003                         100.0 MB log only
         Apr 13 2014 10:19PM       not applicable
ECD_data_002                      10240.0 MB data only
         Apr 13 2014 10:27PM               10444800
ECD_log_003                         200.0 MB log only
         Apr 13 2014 10:28PM       not applicable
ECD_log_003                         100.0 MB log only
         Apr 14 2014 3:27AM       not applicable
ECD_log_003                         100.0 MB log only
         Apr 14 2014 5:01AM       not applicable
ECD_data_002                      10240.0 MB data only
         Apr 25 2014 1:15AM               10444800
log only free kbytes = 12592896
But still we are unable to proceed. Please let us know if correct procedure has been followed for auto extend.
Please help urgently!!!
Regards,
Srikanth G

The image shows a database/panic error and no sign of an actual number indicating space available in the database. Then there's this:
hnpclecd:ecdadm 62> cat SYBSPACE.LOG
SCRIPT SYBSPACE
=================
auto extend feature is not set
Msg 3606, Level 16, State 0:
Server 'ECD', Line 41:
Arithmetic overflow occurred.
======================================================
I'm guessing ...
The SYBSPACE script is suppose to generate some numbers indicating space usage for the database in question.
But the SYBSPACE script runs into an error so it fails to generate the space usage numbers that SUM is looking for.
SUM is proceeding as if the lack of space usage numbers is an indication of no free space in the database, as opposed to aborting the entire process because of the SYBSPACE error.
Fix the code that's generating the error in the SYBSPACE script and you'll probably find that SUM is then able to accurately assess the state of your database.
The code that's generating the error (3606, arithmetic overflow) definitely needs to be fixed by SAP (ie, open a tech support case with SAP) but in the meantime if you've got access to the SYBSPACE script, and you understand T-SQL, you could probably fix the SYBSPACE script so that you can continue with your SUM operation.

No "Auto Extend" option for tablespace files in sqldeveloper 4.0

In Create Tablespace > File specification tab there is no “Auto Extend” option anymore in sql developer 4.0 (still present in 3.2). Maybe someone knows how to enable it if I missed something in configuration?
Here is an illustration:
http://i.piccy.info/i9/7c8d7a842786c5e2d07fb07464948813/1387918107/43886/670008/screen_14.png
Thanks.

Oh, really? Before rising this question I tried to search everywhere and did not find any mention of this defect. Thank you for confirm this.

Auto extend is not working

Dear All ,
PSAPSR3 is auto extended as well as we have more space in file system level,even though PSAPSR3 is not autoextended.
let me know how can i resolve my problem.
PSAPSR3 249,520.00 10,190.38 96 YES 250,000.00 10,670.38 96 25 157,305 229,300 ONLINE PERMANENT
used % 96 and total used also 96%
Kindly suggets.
Edited by: satheesh0812 on Jan 7, 2011 5:04 PM
Edited by: satheesh0812 on Jan 7, 2011 5:05 PM

Hi,
a datafile can do a maximum autoextend up to 32 G.
The standard installation sets the upper limit to 10000M.
Obviously you have 25 datafiles that can grow up to 10000M and the actual size is already 249520M.
So no real potential to grow any more (just 480M left).
So either
a) add three new datafiles of size 2000M that can also grow up to 10000M
or
b) set your existing datafiles to an upper limit of i.e. 12000M (with brtools -> turn on and maintain autoextend for each datafile).
Now lets check the maths
a) would set the total size to 249520M + 6000M and the total autoextensible size to 250000+30000M
and that would mean 93,5% real and ~85,5% autoextend utilization.
Doing this would require potentially 30G freespace in your filesystem
b) Would leave the total size untouched for now and set the autoextensible size to 25*12000M
bumping down the autoextend utilisation to 75%. This would require potentially 50G freespace in your filesystem.
Best regards
Volker

Turns An Existing Fixed Size Datafile To Auto Extendable

Hi
I wish to have a sql statement which turns an existing fixed size datafile to auto extendable.
Wishes
Jawad

An example from my test DB :
SYS@db102 SQL> alter database datafile '/home/ora102/oradata/db102/test01.dbf'
2 autoextend on next 5M maxsize 100M;
Database altered.
SYS@db102 SQL>

Auto Extend Feature - New?

Hello,I just set a recording for the NASCAR race on Sunday, August 9 on NBCSN using the Guide. When selecting the options to extend the program, one of the choices was Auto Extend. I have not seen this before. How does it work? Will it really record to the end of the program if it runs over? Previously, to extend future programs for several hours, I had to set recordings for the programs after. Nothing is more disappointing that investing time watching an event only to have it run late and not see the end. Thanks in advance.

Yes it is new. Unfortunately in my case it is not working and cannot be trusted...
http://corporate.comcast.com/comcast-voices/new-this-month-on-x1-elevating-sports-programming-and-simplifying-troubleshooting
char2014 wrote:
Hello,I just set a recording for the NASCAR race on Sunday, August 9 on NBCSN using the Guide. When selecting the options to extend the program, one of the choices was Auto Extend. I have not seen this before. How does it work? Will it really record to the end of the program if it runs over? Previously, to extend future programs for several hours, I had to set recordings for the programs after. Nothing is more disappointing that investing time watching an event only to have it run late and not see the end. Thanks in advance.

Auto extend layer

I have a layer that extends as content goes beyond the
initial size settings. (auto) When editing the content in design
mode I can not see beyond the original size of the layer although
the borders are extended as needed. The text is there but not
viewable. I think I am missing a setting like view all or
something.
If anyone has suggestions other that stay away from layers
;-) please share ....
JC

Double click on the content.
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"jhcaron" <[email protected]> wrote in
message
news:ejvpfj$ehs$[email protected]..
>I have a layer that extends as content goes beyond the
initial size
>settings.
> (auto) When editing the content in design mode I can not
see beyond the
> original size of the layer although the borders are
extended as needed.
> The
> text is there but not viewable. I think I am missing a
setting like view
> all
> or something.
>
> If anyone has suggestions other that stay away from
layers ;-) please
> share
> ....
>
> JC
>

Tablespace auto extending

Hello,
In PRD: PSAPSR3 tablespace is consisting with 9 Data Files and it is in AutoExtened YES mode
All Datafiles are set to MAXSIZE as 10000 MB - with auto extensible yes
Currently 5 of the DataFiles reached to its maxsize.
So other 4 DataFiles is currently getting the data.
(sr3.data1 - 5250 MB used,
sr3.data3 - 5780 MB used,
sr3.data5 - 6250 MB used,
sr3.data7 - 5900MB used)
What will happen when those 4 data files also reached to its MAX Size. (i.e: to 10000 MB)
Will that automatically add a new datafile? (like sr3.data10)
Or else
Before reaching to its MAX size do we need to add a datafile manually and increase the Tablespace Size?
regards,

Hi,
Will that automatically add a new datafile? (like sr3.data10)
You will have to add the datafiles manually using BRTools.
Keeping the autoextend in ON mode in production environment may lead to a situation where we do not have free disk space to add a datafile to the tablespaces. In such a situation all ur operations will be stopped until u add the disk space. So, in a PRODUCTION environment it is always better to have the datafiles in autoextend OFF mode and monitor the datafile/DB growth periodically(daily/weekly) to avoid a situations when the entire disk space is filled up.
Hope this helps.
Regards,
Varadharajan M

HOW TO VIEW THE ENABLED AUTO EXTENDS FOR THE DBF

HI,
CAN YOU TELLME WHICH VIEW HELPS TO VIEW THE ENABLED AUTOEXTENDS FOR DBF.
Thanks in advance
cgprasad

Hi,
PROD.SQL>DESC DBA_DATA_FILES
Name                                                  Null?    Type
FILE_NAME                                                      VARCHAR2(513)
FILE_ID                                                        NUMBER
TABLESPACE_NAME                                                VARCHAR2(30)
BYTES                                                          NUMBER
BLOCKS                                                         NUMBER
STATUS                                                         VARCHAR2(9)
RELATIVE_FNO                                                   NUMBER
AUTOEXTENSIBLE VARCHAR2(3)
MAXBYTES                                                       NUMBER
MAXBLOCKS                                                      NUMBER
INCREMENT_BY                                                   NUMBER
USER_BYTES                                                     NUMBER
USER_BLOCKS                                                    NUMBER                  Regards,
Yoann.

Resetting maxbytes in data files with auto extend on

my system datafile crossed max size
one temp file reached max size.
need to reset the maxbytes column i think i need to execute like below
alter database datafile X autoextend off;
alter database datafile X autoextend on maxbytes <new value>;
Am i correct ?

Raman wrote:
my system datafile crossed max sizeThis shows that your system datafile is with autoextend off?
one temp file reached max size.
need to reset the maxbytes column i think i need to execute like below
alter database datafile X autoextend off;
alter database datafile X autoextend on maxbytes <new value>;
You can just use the second command to change your maxbytes. No neet to make autoextend off for this.
Am i correct ?Regards
Anurag

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class MyGenericClass<T>
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this snippets works just fine:
(Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];But now I have no inheritance but the definition of the type parameter via instantiation:
MyGenericClass<String> entity = new MyGenericClass<String>();The method "getGenericSuperclass()" does not suit my needs because it does not target the actual class. Nor can "getTypeParameters() " help me...
After countless trying to retrieved the type information, I still have no clue how to determine for that case that (in my example) the type parameter
is a 'String'.
Does anyone know the solution?

Serethos_0 wrote:
Sure I could pass the class type itself as parameter to be stored in 'exportClassType'. But I only tried to adapt the idea used e.g. in Generic DAOs
as descibed here: [http://community.jboss.org/wiki/GenericDataAccessObjects]. The big difference is, that in the Generic DAO example the typed
information is available within the class definition ..
Besides that I am open for any other suggestion!I would recommend passing around the Class object as you say.
Some might suggest that you make MyGenericClass abstract, forcing any instantiation to be like this:
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Questions in dbms_stats parameter

Hello, I am using oracle9i.
I have couple of questions when i read this help...
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_stats.htm#i1036461
I would appreciate if any one could answers my questions.
Question1
=======
Method_opt parameter.
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- SKEWONLY : Oracle determines the columns to collect histograms based on the data distribution of the columns.
I understand about SKEWONLY. In AUTO determine the column based on data distribution and workload of the columns... What is workload of the column? Is this based on how many queries run based on that column? How does oracle track this?
Question2
======
Method_opt Parameter.
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My understanding is, when we specify size 1, then it creates only one bucket. Even though, we have more then one distinct value in the column.
Let us say, we have 10 distinct values in a column, if we specify SIZE 5, then it creates only 5 bucket. But we have 10 distinct values... How does this work in this scenario?
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There is a table called col_usage$ that stores information about column usage. The dbms_stats package uses this to determine whether on not a histogram will be gathered on a given column. How it determines whether or not to gather histograms from the given data I don't know exactly.
size 1 means that there is no histogram as all values are in a single bucket.
10 Distinct values and only 5 buckets, means you get height balanced histograms and you will evenly spread sampled values through the buckets.
You will have a max and min values. The optimizer uses a formula which estimates selectivity by a range of factors such as min max value in a bucket, size of the bucket, number of values per bucket, and how popular a given value is(number of buckets value appears in)
5 Distinct values and 10 buckets, give you a frequency histograms. You will only have 5 buckets each with 1 value. There is no point in having an empty bucket. Frequency histograms are more accurate as the exact number of occurrences of a given value are known. They calculate selectivity based on the number of occurrences of a value per bucket over the total number of occurrences of all values.

Oracle 10g is an auto managed database. Why ?

Oracle 10g is an auto managed database. Why ?
I have read that with 10g version, Oracle database will need very less management, since it can be configured to automanage itself. Sounds not believable.
Apart from auto extending tablespaces, what others tasks can be automanaged in Oracle DB 10 G release ?
Please discuss.
Gony

Wow I feel like I'm back in college... are you in school?
How about ASSM?
All kinds of things on that from google.
http://www.google.com/search?hl=en&rlz=1C1GGLS_enUS291US303&q=oracle+assm&aq=f&oq=&aqi=g3
http://www.google.com/search?hl=en&rlz=1C1GGLS_enUS291US303&q=automating+oracle+databases&aq=f&oq=&aqi=
P.S. What is this all about? RMAN - Gony's reading task for 07/11/2009
Edited by: TimS on Jul 10, 2009 4:26 PM

Parameter of auto extend

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