Multiple datafiles per tablespace in 9i?

Is it recommended to have multiple datafiles per tablespace?

Is it recommended to have multiple datafiles per
tablespace?It all depends on your particular storage needs. You could have a single datafile at maximum capacity for your tablespace, just ensure you can store it and in case you have to move it, it could be affordable.
There are DBA's who use several datafiles for a single tablespaces, this reduces the single point of failure possibility and allows a more flexible datafile maintenance.
Performance is the same for, except for the checkpoint process, the more datafiles, the more effort to update datafile headers.
~ Madrid

Similar Messages

  • Resize Tablespace having  multiple datafiles...

    Hi All,
    Is there any way to resize the tablespace having multiple datafiles? Tablespace having multiple DBF can not be resized like we did with alter database datafile ...resize command.
    Please let me know if anyone having any idea.
    Thanks in advance.

    But as of now I have 4 DBF in a single Tablespace and all are having more than 25G in a size. And I can see many of the free blocks in all the files at the end If the free blocks are at the end, what prevents you from resizing the datafiles?
    when data are inserting in the DBFs its not only spread to single file and once its reach to max size then only moved to second DBF, its scatter with the all the allocated DBFs of that particualr Tablespace. You can downgrade to 9i! The out-dated method you are after was deprecated with 10g. Why do you want to ignore parallelism and fill up one datafile sequentially until it reaches maximum size before putting data in another?

  • Command to add multiple datafiles in multiple tablespace in one time.

    Send me command to
    command to add multiple datafiles in multiple tablespace in one time.

    Just list the files separated by a comma.
    SQL> alter tablespace example
    2 add datafile 'e:\oradata\scratch\example02.dbf' size 100m,
    3 'e:\oradata\scratch\example02.dbf' size 100m;
    Tablespace altered.
    SQL>
    You will have to use more then one command to add datafiles to multiple tablespaces.

  • Tablespaces with Multiple Datafiles

    I've got a Version 7.3.3.4 tablespace with multiple datafiles. There's a lot of object fragmentation. I want to be able to
    drop and recreate many (but not all) of the objects in this tablespace but exercise some control on which objects go to
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    to datafiles in a "round robin" fashion. I'd like info on exactly how this process works and if I can have a more direct effect
    on where objects are placed within the tablespace?
    Thanks,
    Paul Hargreaves
    [email protected]

    Hi,
    I am interested by having more information about tablespaces and how they are fragmented.
    I could, perhaps help you first by telling you that there is a ALTER command for coelescing space in ORACLE 7.3.4 :
    ALTER TABLESPACE tablespace COALESCE ;
    Of course you should have the permissions (ALTER TABLESPACE)
    This command is for the entirely tablespace ...
    In fact, i need a query that gives me for each tablespaces, how are they fragmented (with segment_name ..).
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  • Adding No. of Datafiles to TableSpace

    Hi All,
    I have doubt regarding adding no. of datafiles to Tablespace. I wanna connect my application to Oracle10g database. As a DBA I am going to allocate on separate Tablespace to this new Application. As time will pass the data acumulated by the application would reach in GBs, So how should I control the datafile???
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    What policy should I follow....
    Regards,
    Darshan

    Hi,
    There is no issue in creating multiple datafiles while creating database or adding them later. If space is no constraitn for you then you should create multiple datafiles during creation of database.
    Also create then with AUTOEXTEND clause and you don't have to put this clause OFF if you create it with MAXSIZE parameter. It's always better tot have MAXSIZE parameter defined because this will not allow your datafile to grow bigger then the MAXSIZE parameter size. Here is example of adding a datafile to tablespace with MAXSIZE clause;
    ALTER TABLESPACE users
    ADD DATAFILE '/u02/oracle/rbdb1/users03.dbf' SIZE 10M
    AUTOEXTEND ON
    NEXT 512K
    MAXSIZE 250M;
    After defining the MAXSIZE, keep a close eye on growth of data in datafile and when its near to fill add a new datafile to tablespace and keep this cycle on....
    Regarding your second question :
    You are write that data is written 2nd to datafile when first one is full. But you try to validate this point running database then sometimes you will find that 2nd datafile is consuming more space then 1st, even have 1st datafile is sufficient empty. This is due to fact od frequent deletions in the tables who resides in datafile.
    Hope that you got some hints......

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    "id": "bp-717ff5d6-7edf-49c7-956f-247e52140712",
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    "graphics": {
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    "driverDate": "8-21-2012",
    "adapterDescription2": "NVIDIA GeForce GT 650M ",
    "adapterVendorID2": "0x10de",
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    "adapterRAM2": "2048",
    "adapterDrivers2": "nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um",
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    "direct2DEnabled": true,
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    "webglRenderer": "Google Inc. -- ANGLE (Intel(R) HD Graphics 4000 Direct3D9Ex vs_3_0 ps_3_0)",
    "info": {
    "AzureCanvasBackend": "direct2d",
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    "AzureFallbackCanvasBackend": "cairo",
    "AzureContentBackend": "direct2d"
    "javaScript": {
    "incrementalGCEnabled": true
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    "NSPR": {
    "minVersion": "4.10.6",
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    "NSS": {
    "minVersion": "3.16 Basic ECC",
    "version": "3.16 Basic ECC"
    "NSSUTIL": {
    "minVersion": "3.16",
    "version": "3.16"
    "NSSSSL": {
    "minVersion": "3.16 Basic ECC",
    "version": "3.16 Basic ECC"
    "NSSSMIME": {
    "minVersion": "3.16 Basic ECC",
    "version": "3.16 Basic ECC"
    "userJS": {
    "exists": false
    "extensions": [
    "name": "Norton Toolbar",
    "version": "2014.7.2.6",
    "isActive": true,
    "id": "{2D3F3651-74B9-4795-BDEC-6DA2F431CB62}"
    "name": "Norton Vulnerability Protection",
    "version": "12.2.0.5 - 1",
    "isActive": true,
    "id": "{BBDA0591-3099-440a-AA10-41764D9DB4DB}"
    "name": "Troubleshooter",
    "version": "1.1a",
    "isActive": true,
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    "name": "Windows Media Player Extension for Firefox",
    "version": "1.1",
    "isActive": true,
    "id": "jid0-nRwp7VvCqZcSRTppwWz2npqGEKw@jetpack"
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    "version": "3.5.3",
    "isActive": false,
    "id": "[email protected]"
    }

    Was discussed here - https://support.mozilla.org/en-US/forums/contributors/709022 - in Feb 2013. And Bug #738661 was filed in March of 2012, with the consensus being.
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    '''Additionally, I don't see much point in keeping this bug in the NEW state if it's unreasonable to expect that we'll ever fix this."'''

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