Calculation of the free space in a data file

Similar Questions

• Calculate the free space of the lob segment / reclaim space?

  Friends...

  DB: 11 GR 2

  OS: Linux

  I am trying shrink lob segment and recover the free space between the business segments.

  This area in Oracle DB is new to me so try to learn and to shrink the segment.

  I went through various metalink doco (386341.1) but not be able to get answers for below...

  Issues related to the:

  1. how much free space is available in the lob segment?

  2 can I assume 'no LOB DATA' as the free space currently and even will be recovered once the segment will be shrunk?

  3. no disadvantage of using "ALTER TABLE... SHRINK SPACE.

  4. is it true if storage segment is 100 GB as many redo will be generated when trying to alter table... shrink the space?

  I'm following the steps below.

  1 find Segment name-> sys_lob123

  2. find the size of storage - > 100 GB

  3. find the size of the LOB data-> 70

  4. find the size of the data not LOB-> 30

  2. the storage size

  Select 'storage' from dba_extents bytes

  where nom_segment = 'sys_lob123. '

  100 GB

  3. the size of the LOB

  Select dbms_lob.getlength (col_lob) in the table_lob;

  70 GB

  4. the size of the LOB data not

  100-70 = 30 GB (i.e. #3 - #2)

  Thanks in advance and enjoy your time looking into this...

  Use DBMS_REDEFINITION to reorganize the LOB segment, it is the best way to retrieve a LOB segment space. Also use the clause "MEANS of COMPRESS" and SECURE LEADER, creating the temp table. There is no reason that you can use the BASIC FILE. It's online process, which means that your app can stay up to... However, make sure that monitor you the database when executing redef, as it can cause conflicts and slow down your application, in which case you must kill the reorg...

  If this process is not feasible or overwhelms you, "ALTER TABLE MOVE" is another option.

  With 'Displacement of Alter table', you need to rebuild all indexes after you move the LOB segment. Don't forget this is an offline process and your application needs a time out while you do this.

  Here is the query to list the 10 LOBs albums in your database-

  fixed line 160

  Col a20 PROPRIETARY format

  Col TABLE_NAME format a30

  Col COLUMN_NAME format a30

  Col nom_segment format a30

  size col 999 999 999 format

  SELECT *.

  FROM (SELECT b.owner,

  b.table_name,

  b.column_name,

  a.segment_name,

  SUM (a.bytes) / (1024 * 1024) "size".

  FROM dba_segments a, b dba_lobs

  WHERE a.segment_name LIKE '% SYS_LOB '.

  AND a.segment_name = b.segment_name

  AND a.owner NOT IN ('SYS', 'SYSTEM', 'GENERAL', "OUTLN")

  B.owner GROUP,

  b.table_name,

  b.column_name,

  a.segment_name

  ORDER BY DESC 5)

  WHERE ROWNUM<>

• Cannot use disk utility to create the partition of the free space on the external USB drive.

  I have a red 3 TB Western Digital drive in a USB hard drive docking station.

  The reader is GPT, and I have two volumes on it (a single volume is "Microsoft reserved", another volume is NTFS).

  The other part of my drive is 1.5 TB of free space. I want to create a new partition with free space so that I can put backups Time Machine encrypted external hard disk.

  I checked free space on the drive with my Windows machine:

  
  DISKPART> list disk
  
  Disk ### Status Size Free Dyn Gpt
  
  -------- ------------- ------- ------- --- --- 
  
  Disk 0 Online 167 GB 20 GB
  
  Disk 1 Online 465 GB 0 B *
  
  Disk 2 Online 2794 GB 1526 GB *
  
  DISKPART> select disk 2
  
  Disk 2 is now the selected disk.
  
  DISKPART> list part
  
  Partition ### Type Size Offset
  
  ------------- ---------------- ------- -------
  
  Partition 1 Reserved 128 MB 17 KB
  
  Partition 2 Primary 1267 GB 129 MB 
  
  DISKPART>
  

  DiskPart displays 2 partitions - a 128 MB and the other GB 1267 with 1526 MB of free space.

  I took the hard drive of my MacBook Pro running OS X El Capitan 10.11.3 and pulled towards the high disk utility, but for some reason, that it does not resemble the disk utility it is to see the free space, so I can't create a new volume.

  Here are a few screenshots:

  ... of the physical disk in disk utility (notice how it doesn't seem be all unallocated space on the disk to create a new volume):

  

  ... of the NTFS volume in disk utility:

  

  ... of information for the drive in disk utility:

  

  ... of information for the NTFS volume in disk utility:

  

  ... of the partitioning settings page. Notice how the sign is grayed out (I can't create another partition):

  

  

  I'm a new Mac user. My company recently gave me a Mac, so the first thing I want to do is to create a new partition on this external USB drive to put backups Time Machine figures on it.

  In the research I did find a way to do it on a mac computer without erasing the drive and starting over. But you can go to your windows computer and partition the free space of disks. Then use the mac to set the free space as mac os extended journaled. Here's what I found. http://www.PCWorld.com/article/2066191/how-to-partition-a-hard-drive.html the only other way would be to copy the file on the external drive, somewhere, so you can delete it and re partition for windows and mac. Then reinstall windows files. I'm not familiar with windows systems.

• How to erase the free space on my Mac Book Pro

  How to erase the free space on my hard drive?  I have a Mac Book Pro, built late 2013.

  Why do you do this?

• How can I delete a partition and get all the free space?

  I have a partition on my computer, Local C drive and the Local disk D.  C drive is extremely low, free space and disk D is very high with free space. I am trying to delete the partition and have all the free space from D to C. is there someone who can help me maybe?  It would be greatly appreciated!

  Download the free Easeus Partition Master of http://www.easeus.com .  Keep in mind that there may be files on D: to restore factory settings, so do not delete if this is the case.

  I hope this helps.  Good luck.

• What happens on the free space of disks defragmenting the disc.when I used it is reduced. is this real case for all systems?

  What happens on the free space of disks defragmenting the disc.when I used it is reduced. is this real case for all systems?

  Defragmenter free space but can free report incorrect running after the space.

  Run disk cleanup before defragmenting...

• If my insert takes the free space above the pctfree?

  Hi guys,.
  
  If I have my pctfree set at 25%, my block is currently used by 70%, and I do an insert that will leave free of only 5%, Oracle will migrate the line that I inserted, while 25% is still free?
  
  Thank you

  OGUY,

  Oracle will string your line. Migration is happening with the Update statement, not with the insert command. If you insert a line that exceeds the free space of the block, oracle will be chaining line in multi parts be stored.

  HTH
  Aman...

• What determines the maximum size of a data file store?

  I have two SAN devices that serve as warehouses of data for virtual machines.  When you look in the view of data warehouses, the Configuration tab, selection of a host (although a data store is selected in the tree view in the left pane), then selcting properties for this data store.

  On a data store the total capacity is 600 GB, VMFS3.33, Max File Size 256 & Block Size 1 MB

  On the other data store the total capacity is 1.42 to, VMFS3.46, Maximum File Size 1024 GB, & block size 4 MB

  Of course, I understand that the amount of free space in a data store can limit the size a file size may be, but I wonder what are the other factors.

  It is the block size when you format first. If you need more large file size the only way again is to reformat. http://KB.VMware.com/kb/1003565

• I'm unable to reclaim space after deleting data files.

  Dear all.
  
  I'm unable to reclaim space after deleting data files.
  
  Scenario:
  
  One of my mount point has reached full growth of undotablespace (undotbs2), so I spent again (undotbs3) and deleted the old.
  Problem 1.
  Failed to retrieve space after removing the undotbs2.
  Problem 2.
  Dial-up Mount also become fully...:)
  
  The steps that I followed for the switching of the cancellation:
  
  BANNER
  ----------------------------------------------------------------
  Oracle Database 10 g Enterprise Edition release 10.2.0.3.0 - 64bi
  PL/SQL version 10.2.0.3.0 - Production
  CORE Production 10.2.0.3.0
  AMT for IBM/AIX RISC System/6000: Version 10.2.0.3.0 - production
  NLSRTL Version 10.2.0.3.0 - Production
  
  
  SQL > show Cancel parameter
  VALUE OF TYPE NAME
  ------------------------------------ ----------- ------------------------------
  UNDO_MANAGEMENT string AUTO
  UNDO_RETENTION integer 32400
  undo_tablespace string UNDOTBS2
  
  
  SQL > select BYTES/1024/1024, FILE_NAME in dba_data_files where nom_tablespace = 'UNDOTBS2 ';
  BYTES/1024/1024
  ---------------
  FILE_NAME
  ------------------------------------------------------------------------------------------------------------------------------------------------------
  45688.125
  /U04/oradata/RADPRDMH/undotbs02b.dbf
  6268
  /U04/oradata/RADPRDMH/undotbs02a.dbf
  
  
  
  CREATE UNDO TABLESPACE undotbs3
  DATAFILE ' / u05/oradata/RADPRDMH/undotbs03a.dbf'
  SIZE 5000M AUTOEXTEND ON;
  
  
  ALTER SYSTEM SET UNDO_TABLESPACE = undotbs3 SCOPE = BOTH;
  
  
  DROP TABLESPACE UNDOTBS2 INCLUDING CONTENT AND DATA FILES;

  Only solution is umount the point of editing or the db bounce. It is because of 'SEMAPHORE '.

  Semaphores are sharable resources who take a non-negative integer value. They are manipulted by the P (waiting) and V (signal) functions that decrement and increment the semaphore, respectively. When a process needs a resource, a "waiting" is issued and the semaphore is decremented. When the semaphore contains a value of zero, the resources are not available and the calling process turns or blocks (if applicable) until resources are available. When a process opens a resource controlled by a semaphore, it increments the semaphore and the waiting process are advised.

• How do I reduce the data file after the moving images to another data file

  All,
  
  I did a test of simepl to see how should I reduce my data file after the transfer of the objects thereof.
  
  I had an image in my data file USER_image, which is about 9 GB in size. I created the new data under the new tablpespace file and moved all the images in this new space of tables. So my old tablespace of image with its data file is now empty. At least there is not all user objects.
  
  Now I tried to resize the old datafile (USER_image) to a smaller value, but I keep this error
  "ORA-03297: file contains data beyond the value required to RESIZE.
  
  The file size is 9 GB and I tried to resize to 8 GB but it still does not allow me.
  
  Is it possible to resize a data file after moving all its purpose?
  I'm something wrong or missing something?
  
  Thanks in advance.

  If you old image tablespace is indeed empty (you need to run a statement against DBA_SEGMENTS to check) then you can bring it, data files included.
  After this, you can create a 'new' tablespace with the old name and desired data file sizes.

• Ability to store data about the free space is not the same in VMware and 3PAR

  Hello

  I'm running vSphere version 5.1.0 Server build 799731 and all my ESXi hosts running the same version: 5.1.0 799733.

  I use 3PAR as a storage system for my VMware environment, but on some of my LUN created, I get a different number on what is currently available as a free space on the LUN.

  On a LUN (LUN2_R5), vmware says that is has a capacity of 3 to and free pace on TB 2.08 (and it has been updated this morning).

  But if I look in my view of 3PAR system, the same number of unit logic (LUN2_R5) has a size of 3 TB, but the size of the user used in 85% (2.6 TB of data).

  If I do a look of VMware in the LUN, corresponds to the size on the LUN with the VMware view server, but I do not understand why 3PAR has another number.

  Can you help me?

  Kind regards

  Carl-Marius

  Your storage system only "knows" what's on the VMFS file system. As soon as the space is allocated, it is marked as used from the point of view to the storage.

  André

• ESXI 4.1, 348481 Question about data store, not be able to use all the free space?

  I am working on installing ESXi 4.1 on a Dell R710 with 3.7 to with SATA, RAID 5 disks. My problem is when I'm going to create my store of data it shows I have 3.7 TB of free space. I told him to use all but the data store comes out 1.63 TB. I deleted that and made a 1 TB data store, but when I went to create a new one he would not give me the ability to use the remaining free space. I'm really green when it comes to the implementation of VMWARE for any help would be greatly appreciated.

  Thank you, Don

  Hello.

  The maximum size for a single volume must be 2 TB - 512 bytes, as described in KB 3371739.  Use the RAID Dell utilities to carve up the storage volumes of that size or smaller.

  Good luck!

• check the free space on the data store before making svmotion

  I'm trying to understand how to check free space on the data store until the proceeds of the svmotion.

  Example:

  -must first check that that sizeof (VMs to be moved) < sizeof (destination) - 50 GB before in terms of the

  -should leave a 50 GB buffer so that the script ends when all the VMS are moved from source data store or there are only 50 GB left on the source data store

  -must move VM to store data source to the destination data store 2 at a time, until the completion

  -must create a local log file, and then send this log file using the relay smtp server.

  I just started using powershell and have played with different things for about a week. I'm trying to understand this problem, anyone has advice or suggestions for me?

  Any help would be greatly appreciated...

  Hello

  Yes, the $vmname is empty, change the line as below

  Move-VM -VM (Get-VM -Name $vmm.Name) -Datastore (Get-Datastore -Name $DSname)
  

• How can I get the 'free space' in my SSD back?

  I tried to install windows via boot camp on my macbook air 2013 Wizard but I got an error during partitioning and restarting the laptop now I'm stuck with my Macintosh HD impossible to return to full capacity. So I tried to search the net to find answers, but I could not find. I have about 55 GB of free space, how could I get it back? I'm also on El Capitan. My ssd is 250 GB and macintosh that HD used to identify all 250 now it is stuck at 199 - ish. Thank you!

  Have you tried to use Boot Camp Assistant to delete the partition that it created? If you do not, then you should give it a try. If instead you tried to solve it using disk utility, then you have garbaged s disk RDB. Either you can take a long time to find out how to solve this problem using the Terminal or you can clone your OS X volume to another disk using disk utility or Carbon Copy Cloner, boot from the clone, erase your internal drive, the clone of restoration on the internal drive, then restart your computer from the internal drive.

  Step 1: Fix the hard disk and permissions

  Boot from an OS X install disc

  1. Insert the OS X installation disc into the optical drive.

  2 restart the computer.

  3. immediately after the ring, press and hold the C"" key.

  4 release the button when the spinning gear under the Apple grey dark

  logo appears.

  5. wait for the installer to finish loading.

  Boot from a recovery HD:

  1. reboot the computer.

  2. immediately after the ring, press and hold the

  'ORDER' and the set of keys 'R '.

  3. release the keys when appears the utilities Menu.

  After the installer loads, choose your language and click on the button continue. When the menu bar appears, select disk utility from the menu of the Installer (the menu utilities for Tiger, Leopard or Snow Leopard).

  For Lion or later select disk utility in the main Menu of public services.

  After disk utility loads select your entry from hard drive (to mfgr. ID and Player size) of the list on the left.  In the disk utility status area, you will see an entry for the S.M.A.R.T. status of the hard drive.  If it does not say "Verified" then the hard drive is faulty or has failed. (State SMART is not reported on external drives Firewire or USB). If the drive is "verified", then select your OS X volume in the list on the left (subentries under the entry for the road), click the first aid tab, then click the repair disk button. If THE reports any errors that have been corrected, and then run repair disk again until no errors are reported. If no errors are reported, click repair permissions. Wait until the operation is complete, then exit FROM and return to the installer.

  If Disk utility reports errors, that it can not solve, then Disk Warrior or Tech Tool Pro to repair the drive. If you do not have one of them or none of them can fix the disc, then you will need to reformat the hard drive and reinstall the OS X.

  Second stage: Remove the old drive and install the new drive.  Place of the old drive in an external USB enclosure.  You can buy one at OWC , which is also a good supplier for the readers.

  Step 3: boot from the external drive.  Restart the computer and after the buzzer, press on and hold down the OPTION key until the Boot Manager appears.  Select the icon of the HD to the external hard drive recovery, and then click the arrow pointing down.

  Fourth step: new preparation of the hard drive

  1. open utility disk in the utility Main Menu, then click on the continue button.

  2. the disk utility charges and then select your new hard drive (it's the entry with the)

  MFGR. ID and size) from the list on the left. Note the SMART status of

  the reader in the status area of THE.  If it says not "verified" and then the player

  is failing or has failed and will need replacement.  Otherwise, click on the

  Tab in the main window of the disk utility partition .

  3. in the title of the Volume entitled plan defined the number of partitions from

  the drop to one. Set the type of Mac OS Extended format

  (Journaled). Click the Options button, set the partition scheme

  GUID then click on the OK button. Click on the Partition/apply button and

  Wait until the process is completed.

  4. Select the volume you just created (it's the auxiliary input under the)

  entry by car) from the list on the left. Click on the Erase tab in THE MAIN

  window.

  5. set the type of format Mac OS extended (journaled). Click on the

  The button options , check the box for zero data and click OK to

  return to the window to erase it.

  6. click on the delete button. The formatting process can take up to several

  hours depending on the size of the disk.

  Fifth step: clone the old disk to the new disk

  1. Select the destination volume in the list on the left.

  2. click on the tab restore in the main window of THE.

  3. check the box labeled destination Erase.

  4. Select the destination volume in the left list and drag it to the

  Destination entry field.

  5. Select the volume of the source of the list on the left and drag it to the

  Input source field.

  7. check you correctly, then click on the restore button.

  Destination means the new internal drive. Source means the old external drive.

  Step 6: open preferences Startup disk and select the new internal volume.  Click restart.  You should boot from the new drive.  Eject the disk and disconnect it from the computer.

• where the free space is managed for automatic segment management space

  Hello
  I am preparing for OCA and arrived by a question. which
  
  Q: with management automatic segment-space, where free space is managed?
  
  A. to the extent of a created tablespace
  B. in the control file
  (C) in the data dictionary
  D. in the undo tablespace
  
  Answer mentioned: D
  
  But as I know that the news of free space for automatic segment space management are bitmaps stored in the header of the segment.
  
  Please help clarify...
  
  Thanx.
  
  Ashutosh

  Dear Ashutosh,

  Undo tablespace does not support segments and segment car space management can be applied to the locally managed tablespace. Segments of cancellation are dealing with the management of the undo tablespace IF you set undo_management auto. Otherwise the system tablespace and rollback segments will load to cancel (not recommended)

  Dictionary managed tablespaces store the information in the data dictionary and controlfile doest not manage free space here and I assume that the answer to this question is A :) I hope I'm not wrong! :)

  Hope that helps.

  Ogan