Compression/free space in the database.

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<>

• Cant' import images of Photos because "it is not enough free space on the volume of your library to import the selected items.

  Hey guys,.

  So I tried to import some ~ 8 GB of photos on my mac, but the Photos app gives me the following message: "there isn't enough free space on the volume of your library to import the selected items. It is estimated that you need at least X.XX GB of additional free space. »

  Where X.XX represents the amount of GB it says that I need but it changes everytime that I reopen the application to attempt an import.

  My mac has currently 44.4 GB so I don't know why this issue is coming.

  Any help would be great!

  Thanks in advance,

  Andres

  Where is your library?  If it's on an external HD and how the drive is formatted?

  Have you tried to repair the library according to this document from Apple: library of your repair?

  What version of PHotos do you use?

  

• 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.

• I bought the extra memory. What I have to do something when I install the new memory? __I went to Disk Defragmenter and it always says that I have 35% of free space. The new memory will change this amount? Or is it important?

  I bought the extra memory.  I have to do something when I install the new memory?
  I went to the Disk Defragmenter, and he always says that I have 35% of free space.  The new memory will change this amount?  Or is it important?

  Monday, December 20, 2010 18:53:59 + 0000, Magallón wrote:
   
  > I bought extra memory.  I have to do something when I install the new memory?
   
   
  Generally no.
   
  How many memory currently have installed? How did you buy?
  Did you buy exactly the same type, brand, model, etc. ?
   
  Why do you want more memory? Depending on how much you have now, and
  What applications you are running, it may or may not do anything for you. More memory
  is this not better for everyone. This is my standard message on this
  Object:
   
  The amount of RAM you need to good performance is * not * a
  unique situation for all. You get good performance if the amount of
  RAM you have prevents you from using the file page in a meaningful way, and
  It depends on what applications you are running. Most of the people a typical range running
  Enterprise XP applications find that somewhere around 512 MB
  works well, others need more. Almost everyone will see poor performance
  with less than 256 MB. Some people, especially those who do things
  as modification of large photographic images, can see an improvement in performance by
  adding even more 512 MB - sometimes much more.
   
  If you currently use the page file significantly, more memory
  will reduce or eliminate the use and improve your performance.
  If you do not use the pagefile significantly, it will make more memory
  nothing for you. Reach
  http://billsway.com/notes%5Fpublic/WinXP%5Ftweaks/ and download
  WinXP - 2K_Pagefile.zip and monitor your use of the page file. Who should
  give you a good idea of more memory can help and if so, how
  lots more.
   
   
   
  > I went to Disk Defragmenter, and he always says that I have 35% of free space.  The new memory will change this amount?  Or is it important?
   
   
  You have 35% of your hard drive free. It's disk space, also called
  storage. It is not memory, what is RAM. Adding memory will not make
  any changes to the available disk space.
   
   

  Ken Blake (MS-MVP)

• The video file can be published to the specified location. Check that the publishing location is still available, that there is enough free space on the disk, and then republish the movie again.

  It happened once before, but it somehow went away after I restarted my laptop. I restarted my laptop, this time, but it has not worked.

  ~*~

  OK, so I just finished put a video together. It consists of a Hypercam 2 record (which means it's a .avi file), a PNG image, text and a song (which is a WMA file).

  ~*~

  I save the file, and then click Publish Movie. Everything goes well until the last step where the video is actually published. The window made a break for a while before you receive the following message;

  ~*~

  "Cannot complete the movie publish .

  The video file cannot be published to the specified location. "Check that the publishing location is still available, that there is enough free space on the disk and then republish the movie again."

  ~*~

  I know there are a lot of free space on the drive on my laptop (it's an Inspiron 1520), and that there is nothing wrong with any of my files. I tried to change places without result. It simply doesn't get it. It would be a great help to me if someone could tell me what is the problem :)

  ~*~

  Thank you very much

  Len

  Microsoft Windows Movie Maker is not to let me publish my movies

  Hello

  I suggest you try the steps mentioned in the link given below.

  Error message when you try to publish a movie using Windows Movie Maker in Windows Vista: "cannot complete publish movie.

  http://support.Microsoft.com/kb/930435

  Additional information:

  Solve problems with publishing a movie to your computer

  http://Windows.Microsoft.com/en-us/Windows-Vista/troubleshoot-problems-with-publishing-a-movie-to-your-computer

• What happened to my 10 GB of free space on the disk?

  I don't really know... Yesterday, I deleted a lot of films and albums of music from my pc and I am very sure that after I emptied the recycling bin, I had more than 31 GB of free space on the disk. But now... after that I just turned on my pc to start by knitting I noticed that my changed only 20.9 GB HDD space... what happened to the other 10 GB? No, I did not commit a any error with what I pressed on to empty the recycling bin and I even run windirstat just to check everything and I saw nothing wrong with all my files...

  IM using windows 7 ultimate sp1 with 100 GB hard drive (no partitions) 2 GB ram and 2.3 ghz cpu

  Hello

  Thanks for posting your query in the Microsoft Community Forums.

  I understand from the description of the problem, that after deleting a few files of the computer, the hardware space shows 20.9 GB despite 31 GB in Windows 7 computer.

  I understand this must be frustrating, but don't worry, we're here to help and guide you in the right direction.

  I suggest you try these methods and check if it helps.

  Try logging in SafeMode with network and check if the problem persists. If the problem is resolved, perform the scan anti-virus in SafeMode with network.

   

  Method 1

  Step 1

  Start your computer in safe mode with networking.

  http://Windows.Microsoft.com/en-us/Windows-Vista/start-your-computer-in-safe-mode

  Note: When, at the forefront of startup options select safe mode with network.

   

  Step 2

  I suggest you scan your computer with the Microsoft Security Scanner, which would help us to get rid of viruses, spyware and other malicious software.
  The Microsoft Security Scanner is a downloadable security tool for free which allows analysis at the application and helps remove viruses, spyware and other malware. It works with your current antivirus software.
  http://www.Microsoft.com/security/scanner/en-us/default.aspx
  Note: The Microsoft Safety Scanner ends 10 days after being downloaded. To restart a scan with the latest definitions of anti-malware, download and run the Microsoft Safety Scanner again.
  Note: The data files that are infected must be cleaned only by removing the file completely, which means that there is a risk of data loss.

   

  Method 2

  Reduce the number of unnecessary files on your hard disk to free up disk space and help your computer run faster, use disk cleanup. It removes temporary files, empty the Recycle Bin, and removes a variety of file system and other items that you no longer need.

  http://Windows.Microsoft.com/en-in/Windows7/delete-files-using-disk-cleanup

  It will be useful.

  Let us know if you encounter problems with Windows in the future. We will be happy to help you.

• Is this possible? I have less free space on the C drive, and I have exactly 56.998 space USED (s)

  I have less free space on the C drive, and I have exactly 56.998 space USED (s)... Here is the photo that explains everything...

  http://i45.Tinypic.com/eklpja.PNG
  P.S 
  I recently installed a new Windows 7 because my PC was crushed.

  Adding sizes show in various properties of the folder does not show the actual space consumed.

  This free utility can reveal information relevant and that is using the space

  http://www.Jam-software.com/treesize_free/

• How to extend the partition that has free space on the left with diskpart

  I bought an SSD and made a second partition on my HARD drive to transfer my data. I had planned to clone and move the light to my SSD partition, but read that I was better to do a new install. I made a new installation on the SSD drive, deleted the old partition of Windows 7 and went to add to the data partition unallocated space (unallocated space is to the left of the partition). I know that you can not do this with disk management, but I've done it before on my laptop Windows 7 by using diskpart. I found an article earlier about how use diskpart to do what disk management may not, but I don't know how or where I found it.

  I know I can do it with applications 3rd party like GParted, but knowing that it is possible, but don't remember how to do it with diskpart is driving me crazy. Can someone help me?

  Hi Schwaka,

  As a general rule, it is very easy to extend the partition when the free space is right behind, but what can you do with the space left? Most people will feel that it is really a great difficulty.

  Do not worry! Here I recommend you an easy to use, software AOMEI Partition Wizard Server Edition. It is so common among computer users and most of the people speak highly.

  Your problem, there are two choices for you. We have to move the space unallocated behind, and the other is to merge the free space on the data partition. Both functions may not be permitted in Windows 7 disk management. In addition to the two features, more functions are supported to manage your drive.
  

  Have fun with it!

  Best wishes!

• Disco of VmWare Converter problema su spazio - ERROR: failed to create a snapshot of a volume of the source. Possible causes include not seen all NTFS volumes on Windows XP or Windows 2003 source systems with no is not enough free space on the disk.

  Buongiorno,

  Devo connvertire con vmware converter one Nt Server con AC 450MO di spazio libero su disco C: ntfs file system e

  Ricevo this error:

  ERROR: Impossible to take snapshots of a volume of the source. Possible causes include not seen all NTFS volumes on Windows XP or Windows 2003 source systems with no is not enough free space on the disk.

  He problema e che no ho the possibility di līberō altro spazio.

  Some suggestions?

  Grazie in pre-empted.

  Anni fa it era questa versione di VMware Converter: https://dl.dropboxusercontent.com/u/2197180/coldclone.3.03.iso che permetteva the clonazione a freddo. :-)

• determine the free space of the tablespace

  Hi all
  
  How to determine free space of the tablespace?

  Can use this:

  select tablespace_name,
  case when sum(bytes) >= 1073741824 then round(sum(bytes)/1073741824,2)||'gb'
       when sum(bytes) >=1048576     then round(sum(bytes)/1048576,2)||'mb'
       when sum(bytes) >=1024        then round(sum(bytes)/1024,2)||'kb'
       else sum(bytes)||'bytes'
  end free_space
  from
  (select tablespace_name, bytes from dba_free_space
   union all
   select TABLESPACE_NAME, 0 from dba_tablespaces where CONTENTS != 'TEMPORARY' -- this will add full tablespaces
   union all
  select tablespace_name, maxbytes-bytes
   from dba_data_files where AUTOEXTENSIBLE='YES' and maxbytes>bytes)
  group by tablespace_name order by sum(bytes);
  

• 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)
  

• 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...

• How to free up disk space for the database file

  Hi experts BDB.

  I use bdb4.6.21 transaction Btree access method, found that after vacuum db db-> truncate, the size of the db file has changed. How to free up disk file db space? It can be configured?

  Thank you

  Min

  Hi Min,

  What Mike says is that you do not expect that the empty space after an operation of truncation (for example a delete or update that empties a page) in the database (empty pages) to return to the file system and therefore to see the physical file size decreases.

  The next section of the documentation explaining this: required disk space

  Space released by removing the key/data pairs in a Btree database or Hash is never returned in the file system, even if it is reused when possible. This means that the databases Btree and hash are to develop alone. If enough key is deleted from a database which shrinks the underlying file is desirable, use the DB-> compact() method to recover disk space. Alternatively, you can create a new database and copy the folders of the former into it.

  
  

  So, as Mike suggested, you can dump and reload the data into a new database, or copy data from the existing/old database to a new (to remove the old database and rename a new one the old name), or you can try to compact the database using the method compact().

  If you use compact(), then in order to force the return of empty for the file system pages when possible, use the DB_FREE_SPACE flag and try to avoid using an explicit transaction (use a NULL tnxid pointer, so this BDB will use internally of several transactions that will be engaged periodically to avoid locking large sections of the tree).

  When you use the compaction in order to free up space and return pages from database empty in the file system that it is generally recommended to repeat Compact with a value low 'compact_fillpercent '.  In addition, the following output statistics fields in the structure DB_COMPACT, compact_pages_truncated and compact_pages_free should be examined to determine if there is a point, continuing to run the compaction with the same compact_fillpercent.  If the values are strict positive it is then compact() calling again with the same compact_fillpercent (and specify the DB_FREE_SPACE flag).  The compact algorithm allows a single pass on the pages of the database;  pages so not empty at the end of the file will prevent the free pages (which are placed on the free list) to be returned to the file system.

  Kind regards

  Andrei

• Script of free space for the physics of the standby database

  I need to determine how much free space I have in my physical storage spaces of the standby database. Is there a query for this? Remember that dba_ views are not available in a mounted single standby database so I'm pretty well limited to using the views v$. Thank you

  Why do you think you have to check the free space into a storage ensures physical ?
  You cannot create all segments anyway.

  Kind regards
  Uwe Hesse

  http://uhesse.WordPress.com