Tablespace Size

hi,
I am using Oracle 8i. From DBA studio i see that the space assigned to data files is 98.5% full. will it affect performance ?? Ther is very few much space avaiable in the drive. Data file size is around 12 GB auto extend is 50% and free space is 3 GB.
Please suggest...

If the data blocks are not cached in your shared pool , then it will read data blocks from the datafiles and this will leads to some performance issuies.Kuljit already pointed out from your answer that data blocks resides in buffer cache not in the shared pool.
My point is, sometimes, physical reads are better than logical reads. To tune a query, one must concentrate to reduce logical reads. (buffer gets).
Regarding tablespace size and performance problem, as long as there is free space is avaialble then no problems.
If the tablespace is 100% used and its data files are autoextend enabled, then, when oracle needs space to insert datafile and tbs is 100% and its datafile are autoextend, then, oracle has to allocate new exten to keep the data. In this scinario, there might be a slight issue.
If the tbs is locally managed, it will not be that must.
Moreover, if the database is OLTP with heavey transactions, then, its always better to have good amount of free space i the tablespaces.
Jaffar

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Amount of temporary tablespace size used for index rebuild

Hi All,
I want to know approximate amount of temporary tablespace size used for index rebuild. I need this information to avoid the insufficient temporary tablespace error during the huge index rebuild.
Is there a query or procedure to find it out.
Thank you.

Hi,
While creating the index, the temporary segment is created in the permanent tablespace. So permanent tablespace must have sufficient space.
http://www.oracle-base.com/articles/10g/SpaceObjectTransactionManagement10g.php
http://aprakash.wordpress.com/2010/01/05/numeric-segment-name/
Anand

How to see the tablespace size

hi
how to get the tablespace size??
thx

Hello,
select SUM(bytes)/1024/1024 MB from dba_data_files
where tablespace_name = 'xxxxxx';
works fine.
I am trying to build a function for that:
select SUM(bytes)/1024/1024 MB
from dba_data_files
where tablespace_name=upper('&user')
However, I need to make some enhancements:
1. how to make comments in sql files?Refer to the REM statement in the sqlplus reference manual
2. a lot of outputs are generated:
SQL> @get_size
Enter value for user: tts1
old 3: where tablespace_name=upper('&user')
new 3: where tablespace_name=upper('tts1')
MB
2048
how to avoid that so that only the size is
displayed.
for example:
SQL> @get_size
Enter value for user: tts1
MB
2048
Refer to set verify off in the sqlplus reference manual.
>
3. how to let the function accept a parameter such
as:
SQL> @get_size tts1
Refer to the define command in the sqlplus reference manual.
>
4. how to include a usage (help) to that function
such as:
SQL> @get_size
usage: get_size <tablespace name>
Many thanksRefer to the prompt statement in the sqlplus reference manual.
Sybrand Bakker
Senior Oracle DBA

Tablespace size monitoring in Oracle 10g

Hello
Our environment: Oracle 10.2.0.3 3-node RAC, ASM, Linux x86-64
We are using EM Grid Control as a monitoring tool for RAC databases.
We have "tablespace SPACE USED (%)" metric configured for all RAC databases.
For some reason this metric does not work all the time and it does not alert dba when warning or critical threshold reached.
I'd like to hear from people how they monitor tablespace size in Oracle RAC environment with files in ASM.
Thank you,
Yelena

Yelena,
Your problem is realted to GC and it seems it's not configured properly. Kindly check and verify schedule also. May possible it's notifying to other person also..

Tablespace size. System data vs user data.

Hi,
I have Oracle 11.2.0.1 on Solaris 11 x86_64. Software using SYSTEM tablespace. The free space on this tablespace is allmost end,
When i check what amount of data is collected in database i get strange value:
select SUM(qq.MB) from (select table_name,(num_rows*avg_row_len)/(1024*1024) MB, num_rows, avg_row_len from user_tables) qq;
SUM(QQ.MB)
6,43802738189697265625
So i suppose that data using only 6.4MB.... But statistic for this tablespace is
Tablespace                     Used MB                Free MB                Total MB               Pct. Free
SYSAUX                         655                    35                     690                    5
UNDOTBS1                       27                     18                     45                     40
TQTBS                          11                     489                    500                    98
USERS                          0                      5                      5                      100
SYSTEM                         707                    93                     800                    12
What is using 700MB?!

It is a very good thing to use the command line queries to understand these things. But it is also good to know your tools. You should check tablespace size with dbconsole, it shows nice little pictures of how much space is used. Note that your system tablespace is autoextend, and this is a good thing, since as Sybrand noted, that's where the PL/SQL is stored. As a practical matter, unless you are adding a lot of new code, that tablespace tends to expand to a steady size and just stay there. You don't want to fix it there, because you might add new code in the future.
On the other hand, sysaux and your data may need some watching. If you are curious, you can use the tablespace map function in dbconsole to see what is where in tablespaces (and there are scripts floating about to see it command line style). But don't stress over it, Oracle is really good about doing things right. What you have to watch out for is things like auditing or plan maintenance becoming space hogs in sysaux, and some apps, sometimes combined with some bugs, can use too much data space. But really, you shouldn't bother with it too much unless you see something using way more space than you would reasonably expect.
If you want to obsess over something, consider patching. 11.2.0.1 is not a good sign.

Tablespace size report for SQL and oracle servers

Hi All
is it possible to get tablespace size for all sql and oracle server in the form of report in SCOM.
Regards
Madhavi

Oracle: Table size report of Oracle is depend on the MP which yu imported into SCOM
SQL :
1) Create a group which contains folowing dynamic rule
2) Reporting workspace --> Microsoft Gneric Report --> Performace Detail
3) in the parameter area, create a new series, add group which create in step 1) and select the rule: MSSQL XXX: Collect Database Allocated Size(MB)
4) Run the report
5) In the report, click actions and select "Performance details for every object"
Roger

How to see tablespace size in data dictionary

How can I see the tablespace size, and used tablespace size in data dictionary view?
it is not in dba_tablespaces, and v$tablespace
Thanks.

I like this little piece of code of mine:
SQL> SELECT
2          TABLESPACE_NAME,
3          RPAD(RPAD('|',100-PCT_FREE,'X'),100) || '|' USED
4 FROM (SELECT TABLESPACE_NAME,
5    100 -
6      ROUND(100 -(SUM(BYTES)/1024/1024/1024)*100/
7                  (SELECT SUM(BYTES)/1024/1024/1024
8                   FROM DBA_DATA_FILES DF
9                   WHERE DF.TABLESPACE_NAME=FS.TABLESPACE_NAME),2
10            ) PCT_FREE,
11    ROUND(SUM(BYTES)/1024/1024/1024,2) GIBFREE
12 FROM DBA_FREE_SPACE FS
13 GROUP BY TABLESPACE_NAME) TABLESPACE_SPACE
14* ORDER BY TABLESPACE_NAME;
TABLESPACE_NAME                USED
ARCHDATA                       |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX      |
DATBIGGX                       |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX                  |
DATGX                          |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX                                                      |
DATLOWGX                       |XXXXXXXXXXXXXXXXXXXXXX                                                                             |
IDXBIGGX                       |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX                 |
IDXLGX                         |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX                |
IDXGX                          |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX          |
LOGMNRTS                       |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX                                           |
SYSTEM                         |XXXXXXXXXXXXXXXX                                                                                   |
TOOLS                          |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX                                                   |
UNDOGX                         |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX                                         |Yoann.

Re-claim tablespace size?

Dear all,
I am purging the old data, after that the tablespace seems to not re-claim the tablespace size (remain the same) ?
Please advice,
Amy

Leave tablespace alone & find something better to worry about.
Never confuse movement with progress.
Going around in circles is movement but very few folks would consider it to be progress.
"Compressing" tablespace is same as going around in circles.
If you insist in proceeding
1) create new tablespace
2) move all objects out of old tablespace into new tablespace
3) drop old tablespace
4) create old tablespace
5) move all objects out of new tablespace into old tablespace
6) drop new tablespace

Impdp operation taking more tablespace size in compare to expdp...

Hi All,
I have one issue with impdp operation. I am using 11gR2 database and schema's dmpfile size is 5G. When I start loading data through impdp schema's tablespace size grow more than 5G. I have to stop the impdp operation because of growing tablespace size. There is no compress parameter passed during expdp. Lastly I given tablespace maxsize= unlimited but seems like it still not sufficient and have to add one more dbf. so the tablespace size as of now is 60G and impdp operation is still running.
Can anyone guide me if dmp file size is 5G then how could be the tablespace size more than 5G? I have an assumption that if my dmpfile size is 5G then the tablespace size in which I loaded my data (using impdp)should not more than 5G.
Thanks in advance.

I was facing the same problem. After giving parameter TRANSFORM=SEGMENT_ATTRIBUTES:n, the problem has been resolved.
TRANSFORM = transform_name:value[:object_type]
The transform_name specifies the name of the transform. Some of possible options are as follows:
SEGMENT_ATTRIBUTES - If the value is specified as y, then segment attributes (physical attributes, storage attributes, tablespaces, and logging) are included, with appropriate DDL. The default is y. ====> IF THIS IS 'N' PHYSICAL STORAGE ATTRIBUTES ARE NOT INCLUDED.
STORAGE - If the value is specified as y, the storage clauses are included, with appropriate DDL. The default is y. This parameter is ignored if SEGMENT_ATTRIBUTES=n.
Although thread a quite old, but just updating this in case someone needs to refer in future. My system parameter deferred_segment_creation is set to TRUE.
Here is the complete syntax, I have used
impdp vygrdba/******* dumpfile=VYGRVS6I5_25DEC12.dmp logfile=VYGR_PT_09Jan13.log remap_schema= VYGRVS6I5:VYGR_PT TRANSFORM=SEGMENT_ATTRIBUTES:n
Edited by: 980762 on 9 Jan, 2013 3:58 AM

How to query the tablespace size increment speed?

Hello,
Do you have any directions or ideas on how to know the tablespace size increments history. or how to know the frequency of tablespace size increment.
when I went into new database, I never managed this database before, i want to know the tabelspace size increments speed for do the reasonable space extend.
so could you please give us a guide thanks!

RLUO wrote:
Hello,
Do you have any directions or ideas on how to know the tablespace size increments history. or how to know the frequency of tablespace size increment.
when I went into new database, I never managed this database before, i want to know the tabelspace size increments speed for do the reasonable space extend.
so could you please give us a guide thanks!Hi, there good way is using DBMS_SPACE.OBJECT_GROWTH_TREND as Rajesh mentioned that.But also you can use some AWR views to getting this information.Seee below link.
tablespaces' growth trend

Maximum Temp tablespace size you've seen

DB version: 10.2.0.4
Our DB caters a retail application . Total DB Size of 3TB. Its is a bit of mix of both OLTP and Batch processing environment.
Our temp tablespace has 1 file and we had set the tempfile as AUTOEXTEND. Somehow its size has reached 25GB now !
We don't actually need this. Do we?
For a fairly busy DB of around 3TB size, what is the maximum temp tablespace size you've ever seen?
What is the maximum temp tablespace size you've ever seen for Big DB like Telecom, Banking?

The point about temp space is that your requirements are dynamic - the actively used area shrinks and grows.
Comparing apples with oranges, tempfile sizes on system where I am currently here amount to 50 GB but to be honest that's mainly due to a not insignificant number of pretty poor queries, run concurrently, with multipass operations, etc.
Kellyn Pedersen had an example of a process using 720GB here:
http://dbakevlar.com/?p=43
Whilst 25GB may not be earth shattering, a "large" temp area may perhaps be an indicator that you want to review some of your application code.
(What is "large"? "unusual" compared to what is "normal" for your system may be a better metric)
If you're using automatic pga memory management, then there's a limit to what each session can get, it may be that automatic work areas are not suitable for some of your code and some manual sizing is required to prevent operations spilling unnecessarily.
Also, inaccurate CBO estimates on your queries can lead to inaccurately sized work areas that then spill into temp.
There was a reminder of this in one of Randolf Geist's articles on hash aggregation:
http://oracle-randolf.blogspot.com/2011/01/hash-aggregation.html

UNDO Tablespace size

Hi,
We have a production database with size 120GB (DB Version 11.1.0.6), And our UNDO Tablespace size is 30GB.
For the past 4 days the UNDO tablespace utilization is more than 85%.
We have disabled the AUTOEXTEND for the UNDO Tablespace.
So the UNDO RETENTION is dynamically calculated by Oracle itself and the value now is
TUNED_UNDORETENTION
339183
Please suggest how to fix this issue.
Thanks !

Hi,
The UNDO Tablespace size is still increasing. We dont have flashnack enabled for our database.
The database is 11.1.0.6 Standard Edition.
TABLESPACE TOTAL_SIZE_IN_MB FREE_SPACE_IN_MB % FREE %USED
UNDOTBS1 32152 4440 14 86.19
USERS 123784 23120 19 81.32
SYSTEM 1536 465 30 69.73
SYSAUX 1024 449 44 56.15
GGS_DATA 2048 1388 68 32.23
We enabled AUTOEXTEND on for one of the datafiles in UNDO Tablespace.
NAME TYPE VALUE
undo_management string AUTO
undo_retention integer 9000
undo_tablespace string UNDOTBS1
select to_char(begin_time, 'DD-MON-RR HH24:MI') begin_time,
to_char(end_time, 'DD-MON-RR HH24:MI') end_time, tuned_undoretention
from v$undostat order by end_time;
BEGIN_TIME END_TIME TUNED_UNDORETENTION
23-DEC-11 18:15 23-DEC-11 18:25 375077
23-DEC-11 18:25 23-DEC-11 18:35 375678
23-DEC-11 18:35 23-DEC-11 18:45 376278
23-DEC-11 18:45 23-DEC-11 18:51 376578
Please let me know how can i reduce the space consumed by UNDO Tablespace.

What should be idea temp tablespace size ?

HI all
My databases size in between 20 gb to 100gb. waht factor should i consider to fix the temp tablespace size ?
What should be my ideal temp tablespace size for the both database ?

Arun Rao wrote:
HI all
My databases size in between 20 gb to 100gb. waht factor should i consider to fix the temp tablespace size ?
What should be my ideal temp tablespace size for the both database ?what is the version?
Temp size wont depends on database size, It purely depends on user sortings. Create the temporary tablespace with autoextend upto maxsize of 32gb approx & see how users performing sortings.
>
Handle:      Arun Rao
Status Level:      Newbie
Registered:      Jul 4, 2010
Total Posts:      10
Total Questions:      8 (7 unresolved)
Name      Arun Rao
Location      Mumbai
Occupation      DBA
>
7 out of 8 unanswered, if already answered why cant you close those threads? Keep the forum clean.
Edited by: CKPT on Jul 2, 2012 2:46 PM

MTE class for total tablespace size

Hi,
We start a monitoring over the solutionmanager and i asked myself, if it's possible to show the total size of a tablespace.
I only see the free and used space, but not the total.
In moment we calculate the total space with these 2 results, but it is possible to have large difference in total. But i need these data for the reporting.
Thanks in Advance

It is a very good thing to use the command line queries to understand these things. But it is also good to know your tools. You should check tablespace size with dbconsole, it shows nice little pictures of how much space is used. Note that your system tablespace is autoextend, and this is a good thing, since as Sybrand noted, that's where the PL/SQL is stored. As a practical matter, unless you are adding a lot of new code, that tablespace tends to expand to a steady size and just stay there. You don't want to fix it there, because you might add new code in the future.
On the other hand, sysaux and your data may need some watching. If you are curious, you can use the tablespace map function in dbconsole to see what is where in tablespaces (and there are scripts floating about to see it command line style). But don't stress over it, Oracle is really good about doing things right. What you have to watch out for is things like auditing or plan maintenance becoming space hogs in sysaux, and some apps, sometimes combined with some bugs, can use too much data space. But really, you shouldn't bother with it too much unless you see something using way more space than you would reasonably expect.
If you want to obsess over something, consider patching. 11.2.0.1 is not a good sign.

How to estimate undo tablespace size in 11g?

I found someone document said, use this sql to estimate undo tablespace:
select (UR*(UPS*DBS))+(DBS*24) as "bytes" from (select value as UR from v$parameter where name='undo_retention'),(select (sum(undoblks)/sum(((end_time-begin_time)*86400))) as UPS from v$undostat),(select value as DBS from v$parameter where name='db_block_size');
but in my 11g database, the "select value as UR from v$parameter where name='undo_retention'" is 0. so above sql is always get 196608(8192*24)
How to estimate undo tablespace size in 11g?
Thanks very much!

for undo segments size you should turn it to be autoextend on as well undo management set to be AUTO
i.e
undo_managment='AUTO'
for retention see that link
Ora-01555, snapshot too old: rollback segment number 2 with name "_SYSSMU1
BTW as hemant stated leave it to be auto which is good approach but make sure enough space on disk has been
dedicated for undo segments are allowed to grow to the size they need to be based on the requested undo_retention.
Khurram

Tablespace Size

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