Server Administration :: Freeing Tablespace - Returning To Initial Size?
May 9, 2010
Here is my problem : I create a tablespace named ts_photos.I create then a table on this tablespace.Then I insert some blobs records.The space grows up to 2 Gb.
I perform a truncate statment. Then the space grows up to 4Gb.I re-insert the same records and the size stays in 4Gb.The database in in archivelog mode. How can I return to the initial size (2Gb of effective data) : should I drop the tablespace and recreate it?
I need to create table A. which will going have more than 8L records. Daily this table A will truncate and reinsert all 8L records. Also number of records(8L) will we increase 50K per month. what should be storage clause parameters . Mainly initial and next extent.
I have executed the below statement to move a bulk of table from source table space-SHOP3_DATA to destination tablespace -LINUX_CATA. Before executing the statement the source table space was having 85% full message . While executing the statement this is giving the error for the source tablespace means the the tablespace is getting consumed in the source TS. Currently no-one is using the tablespace SHOP3_DATA' . If I add datafile to the SHOP3_DATA the problem may be solved but why the space is getting consumed in the source. Now the tablespace SHOP3_DATA is 95% full
SQL> alter table LINUX_CATA.TST_FOLDERS move tablespace LINUX_CATA; Table altered. SQL> alter table LINUX_CATA.TST_SEARCH_TESTS move tablespace LINUX_CATA; alter table LINUX_CATA.TST_SEARCH_TESTS move tablespace LINUX_CATA * ERROR at line 1: ORA-01658: unable to create INITIAL extent for segment in tablespace SHOP3_DATA
As the undo segments are used in round robin fashion, Is it possible that with varying load (concurrent users, size and number of transactions), the size of Undo tablespace on a particular day is less than the Undo tablespace size few days back, by any chance?
As a basic understanding I know that Undo is preserved for read consistency and transaction, instance recovery So if there are lot of transaction on a database on 05 Feb and before that, but there aren't any transactions on 6,7,8,9, then on 10th Feb can we see the Undo tablespace size is less than that of 05 Feb?
In the following case when data belonging to table is not required for any queries, transactions, even then the undo size is not restored upon dropping the table.
As such for large operations and batch processes shall we keep undo tablespace with files as 'Autoextend' with 'Maxsize' as 'Unlimited'?
I want to increase the size of the tablespace but when i login as sysdba or admin user i can just see the 21 tables in the dba_tablespaces or user_tablespaces. I want to see the tablespaces related to the application.
we have a tablespace of size 900 GB where 90% of space is occupied by two tables having BLOB data and now i need to drop these two tables and then to recover the space, i need to resize the tablespace (datafiles).
I found some of the tablesapces whose used% exceeded 80%.Based on this output i thought of increasing the datafile.But there are many tablespaces of DATA1 whose autoextensible column some are set to NO, and some are set to YES. I believe we dont need to bother about the tablespace whose Autoextensible column set to YES as Oracle will automatically manage until the Maxsize of it. But some tablesapce of DATA1 are set to NO. Should i recommend to add size for this DATA1 tablespace whose autoextensible are set to YES/NO or leave it as it is.
Please see the column below.
Quote: FILE_IDTABLESPACE_NAMESIZE(M)USED(M)FREE(M)MAX(M)AUTOEXTENSIBLE% USED 59DATA13276732741.1325.7532767YES100 60DATA13276732741.6925.1932767YES100 61DATA1327673274026.8832767YES100 76DATA13270032193.31506.560NO98 77DATA13270030858.51841.380NO94 78DATA13270029476.563223.310NO90
i written this code i m facing ORA-04030: out of process memory when trying to allocate 16408 bytes error
/* Formatted on 2011/11/26 11:52 (Formatter Plus v4.8. */ DECLARE row_id varchar2(50); v_batch_id temp.batch_id%TYPE; v_slab_id temp.slab_id%TYPE; flag NUMBER (2); num varchar2(50) := &row_id;
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.
while importing data i got this error in my log file.and i cannot import my data successfuly
in my log file error i found like this
ORA-01658: unable to create INITIAL extent for segment in tablespace USERS IMP-00017: following statement failed with ORACLE error 1658: IMP-00003: ORACLE error 1658 encountered ORA-01658: unable to create INITIAL extent for segment in tablespace USERS IMP-00017: following statement failed with ORACLE error 1658:
i can import my data using imp utility using this syntax
C:UsersAdministrator>imp tiger/****@tcs file=E:DUMP s. dmp log=E:DUMP s.log fromuser=tiger121 touser=tiger statistics=none
this my user tiger default tablespace its uses and its a auto extend on and locally managed tablespace,and i have enough space on my drive also.
I've read the documentation that describes the storage management.I create a tablespace as:
CREATE TABLESPACE MY_TABLESPACE_NAME DATAFILE 'path/filename1.dbf' SIZE 3000M AUTOEXTEND ON NEXT 200M MAXSIZE 4000M LOGGING ONLINE PERMANENT EXTENT MANAGEMENT LOCAL UNIFORM SIZE 1M BLOCKSIZE 8k SEGMENT SPACE MANAGEMENT AUTO FLASHBACK ON;
As the extent management is local, does it mean that any storage clause of the objects (tables, indexes etc.) placed in it isn't taken into consideration? I mean in a case of placing a table in the mentioned tablespace that has a storege parameters defined as follows:
1. what will be the initial extent size? 1M or 100M? 2. what will be the next extent size? 1M or 20M? 3. will the maxextents parameter be taken into consideration? 4. when i'm sure the tablespace is dedicated to keep only one object [MY_TABLE], what should be the relation between the initial datafile size [filename1.dbf] and the initial extent size? Should they be iqual or doesn't matter? 5. as the SEGMENT SPACE MANAGEMENT is AUTO, the PCTFREE param doesn't make sense, right?
i have a tablespace which contains 121 datafile(max limit reached) as a dba what we have to do?
creating a new tablespace with a datafile and assign the users to the current tablespace which i created now.iif the above process is correct,after some time the tablespace which was filled up got freed up.now can i give the access to the users previous (i.e. freed up tablespace) and current tablespaces
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production PL/SQL Release 11.1.0.7.0 - Production CORE 11.1.0.7.0 Production TNS for Linux: Version 11.1.0.7.0 - Production NLSRTL Version 11.1.0.7.0 - Production
My os version is
Linux damdat01 2.6.18-128.7.1.el5 #1 SMP Wed Aug 19 04:00:49 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
My database is OLP system.
My question is what are the advantages and disadvantages having one single tablespace versus multiple tablespace?
Easy to maintain when you have single tablespace. but hard to track the IO issues if you have one single tablespace.
I have one database which is recently upgraded from oracle 8.1.5 to oracle 10.2.0.4.The database is having around 300 tablespace and total size of the database is 1.5 TB.
The database was created in oracle 8i and all the teblespace were DMT(Dictionary Managed Tablespace) .Usually after up gradation all the tablespace are in DMT mode. Now my requirement is to convert all the tablespace into LMT (Locally Managed Tablespace) so that I can AVAIL ALL THE FEATURES OF LMT.
This database is a mission critical database and very less downtime can be allowed.
I am working to understand the space allocation of table with the value we provided with the data type. For that I have created a table with varchar2 and length 50. Size of table created is of 65536 Bytes. This is when we don't have any insertion in the table. Later when we insert some rows, total size if the segment still remain same that is 65536 bytes.
Now again when I created table with varchar2 and length this time is 500 but still it is created with same size that is 65536. So can you just explain, on what values segment size depends on and how the length effect the size & space allocation.
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
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 noticed my DB is generating a lot of "small" .arc files and I am usure why. As you can see from the v$log query my log file size is set to 50MB. But yet BLOCKS*BLOCK_SIZE never adds up to 50MB.
Is there anything else I can look into to see how to make the .arc files larger?
I am using oracle 10g with sga_max_size =4GB and db block size 16k. Now i am creating a tablespace with block size 32 kb , whats value i select for the parameter db_32k_cache_size.
Is there any standard way to calculate the value of this parameter.
