Server Administration :: Unable To Calculate Datafile Shrink Possible Size
Jul 28, 2011
I need to resize my datafile as i have allocated more space and need to reduce ( i.e.data load completed now). my tablespace is having 11.74 gb free space now. it has 3 datafile.
TABLESPACE TOTAL USED FREE PCT_FREE LARGEST FRAGMENTS
------------------------ ---------- ---------- ---------- ---------- ---------- ----------
CFC_DATA 150528 138780.6 11747.4 7.80412946 1251 992
TABLESPACE_NAME FILE_ID FILE_NAME Size(MB)
------------------ ---------- ------------------------------------------------------- ----------
CFC_DATA 71 +DATA/dedw/datafile/cfc_data.4074.731085435 65535.9688
CFC_DATA 334 +DATA/dedw/datafile/cfc_data.4473.757566557 20480
CFC_DATA 1710 +DATA/dedw/datafile/cfc_data.2012.728095695 64512I used below script to find out HWM in order to resize the datafile.
db_block_size is 16KB.
[code]....
in TOAD, we have an option, that is "Minimum size" button against each datafile.. Need the SQL which is running behind when we press this button from TOAD ?
Name Null Type ------------------------------ -------- ------------------------ ENTITY_ID NOT NULL VARCHAR2(100 CHAR) ENTITY_TYPE_ID NOT NULL NUMBER SOURCE_ID NOT NULL VARCHAR2(512 CHAR) XML_SCHEMA_ID NOT NULL NUMBER JOB_ID NOT NULL NUMBER FINGERPRINT NOT NULL VARCHAR2(100 CHAR) ENTITY_XML_DATA CLOB() ARCHIVED NUMBER(1) CREATION_DATE TIMESTAMP(6) MODIFICATION_DATE TIMESTAMP(6) ARCHIVING_DATE TIMESTAMP(6) CREATED_BY VARCHAR2(50 CHAR) MODIFIED_BY VARCHAR2(50 CHAR)
The problem is that the data of the table are 40GB while on the DB the table holds 400GB! How can I shrink and reuse that space except from drop/recreate and drop/import?
The table has no initial data, so that I can play with the INITIAL parameter. Data are inserted, updated and deleted all the time. I have run DBMS_ADVISOR which recommended to SHRINK table. I have performed the shrink :
I have read following statement from a link [URL]...
Oracle Database XE can be installed on any size host machine with any number of CPUs (one database per machine), but XE will store up to 4GB of user data, use up to 1GB of memory, and use one CPU on the host machine.
calculation of this 4GB size. how can we calculate this size?
by simply going to DBF file and seeing their size? or by exporting dump and seeing the size of that dump?
The blocksize for my database is 4096, as i have heard that the minimum size of the datafile is decided by blocksize, but i want to know that how it is calculated as by giving the above syntax the other values will be default. I am trying the syntax in oracle 9.2.0.1.0 version.
I have one generic question about space management. I have one table with size of 1TB. This table stored in ORC1 tablespace. This tablespace contains 70 datafiles.
Since it's 10.2.0.4 database. I have dropped this table by using purge
drop table <<table_name>> purge;
Once table drop was completed. When I check the tablespace space it was 100% free but due to HWM was unable to resize the datafile from current size to small size. What was the reason behind this. Is there any process needs to follow when dropping big tables ? like instead of dropping the tables do I need to truncate first & then drop .
I am trying to increase the size of sga or you can say that i want to make my sga in automatic memory management...Following is the steps i am trying
SQL> show parameter sga_max_size;
NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ sga_max_size big integer 96M SQL>
after that i am trying to increase the size
SQL> alter system set sga_max_size = 200m; alter system set sga_max_size = 200m * ERROR at line 1: ORA-02095: specified initialization parameter cannot be modified
I have a tablespace which has around 32gb space consumed. But if i check the used space then its only 16GB. When i tried to resize the datafile it throws the error
ORA-03297: file contains used data beyond requested RESIZE valueAs per my understanding there are not continous blocks which are there in datafile due to fragmentation may be and there by not able to resize it. If i export the tablespace using datapump and reimport this will release the space.
But i want to know if there are any alternative ways to do the same.
i have exp dump of size 1gb but when i tried to imp ,it showing error of space , it asking for space of 4gb. But i have 1gb on c: drive and 32gb on d: ,can i add datafile on d: locaion and what is max size i can assign to that datafile .
SQL> Alter Table tb_hxl_user Shrink Space Cascade; Alter Table tb_hxl_user Shrink Space Cascade * ERROR at line 1: ORA-10635: Invalid segment or tablespace type
SQL> desc tb_hxl_user; Name Null? Type ----------------------------------------- -------- ---------------------------- STATEDATE NOT NULL DATE USERNUMBER NOT NULL VARCHAR2(13) PROVCODE NOT NULL NUMBER
It is not possible to run SHRINK SPACE against a table with a function based index. This is documented, and I've tested on the current release. I've reverse engineered it a bit, and the issue is in fact that you cannot SHRINK SPACE if there is an index on a virtual column:SQL> SQL> create table t1(c1 number, c2 as (c1*2)) segment creation immediate;
Table created. SQL> alter table t1 enable row movement; Table altered. SQL> alter table t1 shrink space; Table altered. SQL> create index i1 on t1(c2); Index created.
SQL> alter table t1 shrink space; alter table t1 shrink space
ERROR at line 1: ORA-10631: SHRINK clause should not be specified for this object.
I can not drop datafile in a tablespace, how can i do?
SQL> Alter Database Datafile '/u02/app/oracle/oradata/oracl/hxl06.dbf' Offline 2 3 /
Database altered.
SQL> Alter Tablespace tps_hxl Drop Datafile '/u02/app/oracle/oradata/oracl/hxl06.dbf'; 2 Alter Tablespace tps_hxl * ERROR at line 1: ORA-03264: cannot drop offline datafile of locally managed tablespace
I have oracle 10g running on Solaris with file system and some one created database files with same name but in different directories for example data01.dbf in two different directories, say /u01/oradata/data01.dbf and /u02/oradata/data01.dbf. Now, I want to find out the duplicate datafiles (data01.dbf in this case) sitting in different directories, is there anyway to find this out?
Today i am facing an error when going to rezise the datafile its fixed size is 19000M abut after truncating all tables it is 112M, but when i am going to resize its datafile to 500M its get me an error ora-03297 file contain used data beyond requested size values.
I have done the same before a week without any error.But this time i got the error
Is there any way I can calculate percentage of space used in a block.Eg if a table size is 100 blocks,How Can I check the percentage of used space in block.
Erroneously created datafile, re: "/path/../large_rbs_03.dbf" was created under the SYSTEM tablespace which is supposedly be in the LARGE_RBS tablespace.
How do I make the said datafile be under LARGE_RBS?
I have a database of branch A whose files are located in E: Drive. I want to download it in branch B.I placed all the files of Branch A in D: Drive of Branch B. When i start the database i was getting controlfle error. I made required corrections in initorcl.ora. Now when i start the Database,its mounted, but I am getting ORA-01157: Cannot identify datafile 1. I tried to rename the file, but the "alter database rename file1 to file2;" option is not working.
Is there a way to find out when a datafile for an undo tablespace with autoextend enabled actually extended? I've done a few tests, and nothing is written to the alert log or any trace file that I've found. I can't find any V$ or DBA view that will give me the history of a file's size.
We need to find when any datafile was resized ( if at all)in a tablespace. Actually, by noting the created date from v$datafile , we used to know the data growth in a tablespace. Now as the number of datafiles have increased, we want to resize them. This diagnostinc have to be done without changing/adding anything in DB.
I was reading the documentation for oracle 11gr2, with reference to URL>.....
The following examples show how to correctly choose the cluster key and set the HASH IS, SIZE, and HASHKEYS parameters. For all examples, assume that the data block size is 2K and that on average, 1950 bytes of each block is available data space (block size minus overhead).Note that 34 hash keys are assigned for each data block
how they arrive at 34 hash keys because another portion of the document states
This space determines the maximum number of cluster or hash values stored in a data block. If SIZE is not a divisor of the data block size, then Oracle Database uses the next largest divisor.
if that is the case, then number of hash keys should be 1900/55 = 34.55 which should have rounded up to 35.
I mistakenly added a datafile to a tablespace which is asm, however the datafile was created in a default location and not the asm location:
alter tablespace pdaiidata1 add datafile '<filename>' size 2048M;
What I should have done:
alter tablepsace <tablespace_name> add datafile '+DATA1' size 2048M;
Is there any way to move this filesystem datafile into the asm tablespace? In previous Oracle versions, I've taken a tablespace offline, moved a datafile, renamed it, then brought the tablespace back online. Can I do something similar here in this situation?
This facility has one last 10g database and a very problematic tablespace and last datafile associated with it. The tablespace was set up with INITIAL_ EXTENT of 131,072 (128K) instead of the more 'normal' 4,194,304 (4M) and NEXT_EXTENT of 262,144 (256K) instead of 4,194,304 (4M).
More worryingly, the datafile has INCREMENT_BY set to 1 (8K) instead of 1,280 (10M) or 2,048 (16M).Has anyone ever updated sys.ts$.dflinit and sys.ts$. dflincr to modify the INITIAL_EXTENT and NEXT_EXTENT, and sys.file$.inc to modify the INCREMENT_BY?
