It help performance?

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• Feature helps performance call (COLLECTION ITERATOR PICKLER FETCH)

  11.2.0.3

  Solaris 10

  I need assistance with our implementation of the policy of restricting access. From our plans of execution and trace files, we see our political function run when querying tables restricted. This, of course, is planned and is done in a hash against the returned results join by the query . The function fills a set IDs based on the roles that the user has and pushes those predicates against object_1.

  -------------------------------------------------------------------------------------------------------

  | ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

  -------------------------------------------------------------------------------------------------------

  |   0 | SELECT STATEMENT |                  |  5331 |   786K |  1358 (21) | 00:00:03:

  |*  1 |  HASH JOIN RIGHT SEMI |                  |  5331 |   786K |  1358 (21) | 00:00:03:

  |   2.   COLLECTION ITERATOR PICKLER FETCH | GET_PERMISSIONS | 16360. 32720 |    20 (10) | 01:00:00 |

  |   3.   TABLE ACCESS FULL | OBJECT_1 |   634K |    90 M |  1302 (19) | 00:00:03:

  -------------------------------------------------------------------------------------------------------

  The problem we have is with reports where the optimizer find it more effective to make an IMBRIQUEE LOOP between an object and the object of access restricted. The function is then called as as many times as the operation of nested loop runs. When a report may take a few seconds, it will be take minutes to complete because the function is called thousands of times. These reports are very long and complex but below is an example where I forced the nested loop (query takes too long without additional predicate).

  SELECT / * + USE_NL (obj1, obj2) * /.

  Ob1.ID

  Of ob1, ob2 object_2 object_1

  WHERE ob1.obj2_id = ob2.id (+) AND obj1.obj_name IN ('SOME_VALUE');

  ---------------------------------------------------------------------------------------------------------

  | ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time     |

  ---------------------------------------------------------------------------------------------------------

  |   0 | SELECT STATEMENT |                  |  3620 |   190K |   137 (2) | 01:00:00 |

  |   1.  NESTED EXTERNAL LOOPS |                  |  3620 |   190K |   137 (2) | 01:00:00 |

  |   2.   TABLE ACCESS BY INDEX ROWID | OBJECT_1 |  3620 |   123K |   135 (1) | 00:00:01 |

  |*  3 |    INDEX SKIP SCAN | OBJECT1_FK_I |  3620 |       |    22 (0) | 01:00:00 |

  |   4.   SEE PUSHED PREDICATE. OBJECT_2 |     1.    19.     1 (0) | 01:00:00 |

  |   5.    SEMI NESTED LOOPS.                  |     1.    19.    21 (10) | 01:00:00 |

  |   6.     TABLE ACCESS BY INDEX ROWID | OBJECT_2 |     1.    17.     1 (0) | 01:00:00 |

  |*  7 |      INDEX UNIQUE SCAN | OBJECT_2_PK |     1.       |     1 (0) | 01:00:00 |

  |*  8 |     COLLECTION ITERATOR PICKLER FETCH | GET_PERMISSIONS |   137.   274.    20 (10) | 01:00:00 |

  ---------------------------------------------------------------------------------------------------------

  We have reports where the function is called more than 100 000 times and can take 12 minutes additional to complete. I'm not the developer of these reports or our policies, but I do my best to help in tune. I can force it to use hash joins, where possible, and the time of the request is excellent. There is, Unfortunately, thousands of these reports with different degrees of performance degradation because this function so that the developers are wondering if there are other alternatives. Is there a way to tell the optimizer to use of hash joins when dealing with this function? I looked at using different policy types (currently "SHARED_CONTEXT_SENSITIVE"), but neither contributed to improve performance. I've been all over the internet and have not been able to find a similar situation. I tried to be comprehensive, but I do not know I missed some vital information, then please let me know if I can explain it. Thoughts appreciated.

  Thank you.

  CREATE OR REPLACE FORCE VIEW SOME_SCHEMA. SECURITY_ID_TEMP

  (

  ID,

  CONT_CN

  )

  AS

  SELECT id, cont_cn

  TABLE (CAST (some_pkg.get_ids AS rls_array)) t;

  And this latter view is probably what is causing the problem. That's what I said in my answer:

  A possible explanation is that your political function is a predicate that uses a collection.
  . . .
  Probably the political predicate sometimes involves a small number of elements and many other times.

  And it is the predicate that you just posted:

  IF ii_user_is_exempt (some_user)

  THEN

  predicate: = NULL;

  ON THE OTHER

  predicate: = 'security_id in (select id from security_id_v);

  END IF;

  RETURN of predicate;

  The policy predicate is querying a view based on a collection. How the optimizer supposed to know how "rows" are in this collection 'rls_array' which is used as if it were a table?

  As you return a NULL predicate in some cases. I've never tested it, but I would warn against it. See the doc of security

  http://docs.Oracle.com/CD/E25054_01/network.1111/e16543/VPD.htm#CIHBEIFC

  Creating a function to generate the dynamic WHERE Clause

  To generate the dynamics WHERE clause (predicate), you must create a function (not a procedure) which defines the restrictions you want to apply. In general, the security administrator creates this function in its own schema. For a more complex behavior, such as including other functions or adding controls to track logon attempts, create these features within a package.

  The function should have the following behavior:

  • It takes as arguments a scheme name and a name of object (table, view, or synonym) as inputs. Set the input parameters to contain this information, but do not specify the schema name and object themselves within the service. The strategy that you create with the DBMS_RLS (described in "creating a policy to attach the function to the objects you want to protect") provides the namespace of the schema and object to which the policy applies. You must create the parameter for the schema first, the setting for the object.
  • It must provide a return value for the predicate in the WHERE clause that will be generated. The return value for the WHERE article is always a VARCHAR2 data type.
  • It must generate a valid WHERE clause. This code can be as simple as the example in "tutorial: creating a Simple Oracle virtual private Database Policy ', in that its WHERE clause is the same for all users who log on.

  I wonder the use of this collection as part of your policy mechanism.

  TABLE (CAST (some_pkg.get_ids AS rls_array)) t;

  First - each user has its own State of package. This means that each user has its own collection; This isn't a master collection (ID game) that is shared by all users. A real table, is where the data will be shared by all users should exist.

  Second - this function 'get_ids' (I guess this is a feature rather than a grouping variable?) may actually be to interview one or more tables every time it is called. This means that EACH query that performs a user must first call that 'get_ids' that works while it asks a few real tables to obtain information and make a collection.

  Even if a required collection to be used it must be created ONCE and then come back as needed.

  This security architecture raises some red flags for me. It's the first thing that I looked at.

  Yes, I know, any changes that might involve serious implications and require a substantial analysis, testing and implementation. But my suspicion is that where the root of the problem.

  My assumption is at this time that your collection of 'rls_array', used as a table, is the cause of the problem. Oracle does not have statistics on the result set of this "table", and of one query to another, has no way to know if the number of 'lines' changes significantly.

  Oracle could use some dynamic sampling to try to estimate things and inspiring that sampling is changing the execution plan. You could try to find a query which causes problems and to see how the number of items in collection compares the number of a normal query.

  Short of this thorough/fix analysis which I think is necessary, your best bet may be to investigate pinning on an implementation plan; forcing the use of a basic plan for this query little matter that runs it.

  If you want to study Sql Plan Management and this way opens up a new thread for this issue/question and provide a link to the current thread.

  Here is an article from Oracle to become familiar with SPM

  http://www.Oracle.com/technetwork/issue-archive/2009/09-Mar/o29spm-092092.html

  And here is sample thread "How to force Oracle to use an implementation Plan" to give you an idea of the use of the mechanism.

  https://community.Oracle.com/thread/991149?TSTART=0

  See Jonathan Lewis's response in this thread.

  There are many other threads and documentation, SPM, if you want to continue that.

• Reinstall 10.7.5 to help performance

  Late 2009 iMac 10.6.1 when new, now running 10.7.5 with 8 GB of memory and 2 TB of disk running

  My Mac worked slowly for a while. Check memory, CPU etc. in the activity monitor shows no reason for this.

  I want to reinstall the OS X 10.7.5 menu utilities in OS X, but I have no USB or disk with 10.7 on it.

  Given a stage to try and BONE cleaning is to wipe the drive, then I suppose I'll have 10.7 on some media.

  I believe that the steps would be:

  1. all save, deauthorise apps

  2 restart the Mac in recovery mode

  3 erase/format the disc extended journaled format

  4 reinstall OS X

  Who would bring back me to 10.6.1 that came with the Mac, so I have to upgrade to 10.6.8 then 10.7 as soon as I got it on a media, and then work my back to 10.7.5

  So, how I 10.7 or y at - it an easier way to get my Mac running as it was when new?

  Thank you.

  Frank.

  With 8 GB of memory and a HD 2 to (assuming that it has enough free space available on it) and your Mac must perform well. Mac in general do not need 'clean up', but they have a third-party software installed that can cause performance problems. Before you go to the backup, erase, re - install, upgrade to Lion road you can download and run EtreCheck and post the contents of his report here. Can anyone identify if there is a probable cause of software to your problem:

  http://etrecheck.com/

• If replaced missing antifr.dll file will help performance

  When power on get an error indicating that the file antifr.dll is missing and if replaced set the bad performance of the pc.

  Hi PattyOlbrys,

  Have you recently deleted or had no problem with security Radialpoint TITANIUM managed? What is your currently installed AV.

• Need help: performs an attribute-level Validation

  Hi refugees,

  In the OPS how to perform Validation of the attribute levels?

  How to compare the values of two attributes?

  My requirement is I Amountfrom and Amountto articles in the area of Table having 10 records...

  validation is here amounted to must be greater than the quantity of, so for that I need to perform validation in the class of EOImpl...

  To do this, I need to read the value of AmountFrom and compare with AmountTo...

  Here, my question is, how to read the value of AmountFrom...

  Its urgent...
  

  1. Please... Give your valuable suggestions...

  Thank you

  Jaya

  It's really nice

  In addition, close threads once your problem solved.

• Need help - Performance & Tuning

  Hey all,.

  I was wondering if someone could provide all the documents on the Performance and optimization of standards

  Thank you!

  Here are a couple of things worth looking at

  http://communities.VMware.com/servlet/JiveServlet/download/10352-1-28235/vSphere4-performance-troubleshooting.PDF

  but for VI3

  http://www.VMware.com/PDF/vi_performance_tuning.PDF

  and technical guides

  http://www.VMware.com/VMTN/resources/

• Downloaded the file to printer to help performance

  Downloaded from windows update for my printer and now the printer does not print anything

  Downloaded from windows update for my printer and now the printer does not print anything

  Access the site web printer and download the latest drivers for your printer, update may have installed bad drivers.

  OR do a system restore to a date preceding the update.

• Equium L20: very slow performance - how do I speed it up?

  This is probably a really stupid question, but I'm not a techie. My L20 got really really slow... it has never been super fast at first, but now it's really bad.

  I defrag and clean the drive regularly (once a fortnight) and it's really only used to access the interest for the moment.

  Any advice on how to speed up a bit?
  Regards Robert

  To be honest, you did the right thing. Defragmentation and HDD cleaning should help performance.

  It will be interesting to know what is CPU and HARD disk activity while surfing the Internet. Have you noticed ongoing activity of HDD or maybe high CPU load?

• improve system performance slow slow start

  I have a HP Netbook, Mini210 - 1018CL
  I can, t activate the account Windows Firewall assumes that because he, s not active administrator.
  Account main is fine, the firewall is turned on

  Hello

  1. which version of the Windows operating system is installed on your computer?

  2. what happens when you try to turn on the firewall?

  3. do you get an error message?

  4 Aare you the administrator of the computer?

  5 are you facing performance issues or slow start up when starting up?

  If you are the administrator, you must grant the appropriate permissions to make the changes. You can make changes only in being logged on as administrator.

  I suggest you to go through the steps mentioned in the link and the Coachman.

  What are user account control settings?

  http://Windows.Microsoft.com/en-us/Windows7/what-are-user-account-control-settings

  See also:

  Firewall: Frequently asked questions

  http://Windows.Microsoft.com/en-us/Windows7/firewall-frequently-asked-questions

  Performance and maintenance

  http://Windows.Microsoft.com/en-us/Windows7/help/performance-maintenance

  http://www.Microsoft.com/athome/Setup/optimize.aspx

  http://support.Microsoft.com/mats/slow_windows_performance/en-us

  These links are applicable for Windows Vista and Windows 7.

• I can't log on to windows xp after that I erased the validation process. I get messages contradictory screens saying that I need to activate windows, then windows is already activated. Help, please

  I'm trying to get past the log on screen in Win XP.  I activated my copy of XP, but when I try to go into windows, it comes back with a message "you must activate Windows first.  When I try to activate (again), it returns a message "Windows is already activated.)

  Anyone know what is happening?
  Thank you
  Tom

  Hello TomRothweiler

  The steps also included Charles method 1: Guided Help to remove the script that interferes with Windows activation. 
  "The requirements to install and to use this guided help.

  • You must be logged to Windows using an administrator account to install and to use this guided help.
  • You must run Windows Server 2003, Windows XP Home Edition, Windows XP Professional, Windows XP Media Center Edition or Windows XP Edition Tablet PC to install and to use this guided help. »
  The requirements for this stage, it seems you don't need the disk but only download Guided Help and automatically executes the steps for you:
  Method 1: Guided help to remove the script that interferes with Windows activation

  Guided Help is available to remove the script that interferes with Windows activation. Guided Help can automatically perform the steps for you. The actions that this Guided Help performs cannot Ωtre annulΘe after that Guided Help is finished. For more information about guided help, click on the number below to view the article in the Microsoft Knowledge Base: 915092 description of Guided Help for Microsoft Knowledge Base article

  You don't need to refer to the Charles link, I posted the download for you. Click on it to run it and let us know if it helps. Thank you.

  Download Guided Help

• Performance HP tools open in Notepad

  HP Pavilion a6400f Desktop PC running Windows Vista when I click Start, click Help and Support, click on (hp get help performance and maintenance) click performance tools. It is a new problem, MOST OF THE PERFORMANCE TOOLS OPEN WITH ILLISIBLE NOTEPAD.

  Welcome to the HP forum lphil,

  Easy solution:

  If you're lucky, maybe just the name of the file has changed: in other words, the executable file name extension has been changed from filename.exe to filename.exec or file name. "some thing-other-than-"exe"

  IF this is the case, you can change the .exe file extension and you're gold.

  ======================================================================================

  Fixes registry and tools to fix file Associations

  Here's a possible solution - based on "MicrosoftFixit50850".

  Exe files open with Notepad

  You can look at the following:

  How to fix corrupted - file associations

  Restore the Type Associations by default Windows 7 file Extension

   

• How to enable DMA mode? Performance says I'm in PIO mode?

  I have problems with slow performance. I ran Microsoft fix and told me of programs run in mode PIO (programmed input/output). turn on the DMA (direct memory access) mode will help performance. I don't know how to do in this regard.

  Check in device - ATA/ATAPI IDE controllers Manager, check the properties of each channel, tab advanced settings to a checkbox enable DMA.

• Vista performance test

  all my rankings are 5.9 on the performance test, but my memory is 5.6.i have 4 GB, channel double sli memory 800mz and oc my fsb to 1333mz.how can I improve my memory? I read that vista 32 only supports memory.so total 4g add more ram will not improve this right? any advice would be great.
  Thank you
  gtw3

  Hello

  There are a few things you can do to make the system more fast/more attentive.

  Be careful that a lot of these programs and services really needs to run and often remove some
  contributes little to the speed of the machine while making the less friendly machine to use.

  How to troubleshoot a problem by performing a clean boot in Windows Vista
  http://support.Microsoft.com/kb/929135
  How to troubleshoot performance issues in Windows Vista
  http://support.Microsoft.com/kb/950685

  Optimize the performance of Microsoft Windows Vista
  http://support.Microsoft.com/kb/959062
  To see everything that is in charge of startup - wait a few minutes without doing anything - then right click on the task - bar
  The task manager - take a look at stored by - Services - process - it is a quick reference (if you have
  a small box in the lower-left - show for all users can check only).

  How to check and change Vista startup programs
  http://www.Vistax64.com/tutorials/79612-startup-programs-enable-disable.html

  A quick check to see that load method 2 is - using MSCONFIG and then display a list of the people here.

  Method 1 using Windows Defender will tell you more specific information about each program.

  ---------------------------------------------

  It's a little more complicated that you might have a few running services that you can do without.
  Be careful by disabling a service may impact the ability of other agencies to run and cause problems of
  on the road.

  Also some programs add services that might not really need to start automatically. You can
  often these type services put manual to reduce their impact on performance.

  To see these compare these in Start - type in the search box-> find Services at top right click RUN AS ADMIN
  to those of the default Vista as indicated here by BlackViper. Ignore and who are on the disabled (which do not run) or
  Manual (which work only on request) - for any automatic or automatic delayed start you can post here if
  you need help to decide if you should run. Some of these can be assigned to manual and stop so that the calling program can run them as needed.

  BlackViper made also some improvements to default windows services but I wouldn't do those unless you
  really understand the full meaning of change a default service. Then use it as a tool to compare.

  Windows Services - list by default.
  http://www.blackviper.com/WinVista/servicecfg.htm

  -----------------------------------------------------------

  Here are some tools that will help in the future that gain you experience even if the methods above will do what
  you have to do for now.

  Window Watcher - free - do you know what is running on your computer? Maybe not. The window Watcher says it all.
  reporting of any window created by running programs, if the window is visible or not.
  http://www.KarenWare.com/PowerTools/ptwinwatch.asp

  Many excellent free tools and an excellent newsletter at Karenware
  http://www.KarenWare.com/

  Process Explorer - free - find out what are the files, registry keys and other objects processes have opened, the dll
  they loaded and much more. This exceptionally effective utility will show you even owned by each process.
  http://TechNet.Microsoft.com/en-us/Sysinternals/bb896653.aspx

  Autoruns - free - see what programs are configured to startup automatically when your system boots and you
  opening of session. Autoruns also shows you the full list of registry and file locations where applications can configure auto-
  start the settings.
  http://TechNet.Microsoft.com/en-us/sysinternals/bb963902.aspx
  Process Monitor - Free - monitor the system files, registry, process, thread and DLL real-time activity.
  http://TechNet.Microsoft.com/en-us/Sysinternals/bb896645.aspx

  There are many excellent free tools from Sysinternals
  http://TechNet.Microsoft.com/en-us/Sysinternals/default.aspx

  WhatsInStartUP - free - this utility displays the list of all applications that are loaded automatically when Windows
  starts. For each request, the following information is displayed: Startup Type (registry/Startup folder).
  The command - line String, product name, file Version, company name, location in the registry or the file system, and
  more. It allows you to easily disable or remove unwanted programs that runs in your Windows startup.
  http://www.NirSoft.NET/utils/what_run_in_startup.html

  There are many excellent free tools to NirSoft
  http://www.NirSoft.NET/utils/index.html

  -------------------------------------------------------
  Another thing that helps performance is updated drivers - Vista like the updated drivers.

  This is my generic how updates of appropriate driver:

  For drivers, visit manufacturer of emergency system and of the manufacturer of the device that are the most common.
  Control Panel - Device Manager - Display Adapter - note the brand and complete model of your
  video card - double - tab of the driver - write version information. Now click on UPdate Driver (this
  cannot do anything as MS is far behind the certification of drivers) - then do a right click - Uninstall - REBOOT
  This will refresh the driver stack.

  Repeat this for network - card (NIC), Wifi network, sound, mouse, and keyboard if 3rd party with their
  own the software and drivers and all other main drivers that you have.

  Now go to the site of the manufacturer of system (Dell, HP, Toshiba as examples) (restoration) and then of the manufacturer of the device
  (Realtek, Intel, Nvidia, ATI, for example) and get their latest versions. (Look for the BIOS, Chipset and software)
  updates on the site of the manufacturer of the system here.)

  Download - SAVE - go to where you put them - right click - RUN AD ADMIN - REBOOT after each installation.

  Always check in the Device Manager - tab drivers version you install actually shows up. This
  because some restore drivers before the most recent is installed (particularly that audio drivers) so install a
  pilot - reboot - check that it is installed and repeat if necessary.

  Repeat to the manufacturers - BTW on device at the DO NOT RUN THEIR SCANNER - manually check by model.

  Look at the sites of the manufacturer for drivers - and the manufacturer of the device manually.
  http://pcsupport.about.com/od/driverssupport/HT/driverdlmfgr.htm

  How to install a device driver in Vista Device Manager
  http://www.Vistax64.com/tutorials/193584-Device-Manager-install-driver.html

  If you update the drivers manually, then it's a good idea to disable the facilities of driver in the Windows updates,
  This leaves ONE of Windows updates, but it will not install the drivers who are generally older and cause
  questions. If updates offers a new driver and then hide it (right click on it) and then go look for new ones
  manually if you wish.

  How to disable automatic driver Installation in Windows Vista - drivers
  http://www.AddictiveTips.com/Windows-Tips/how-to-disable-automatic-driver-installation-in-Windows-Vista/
  http://TechNet.Microsoft.com/en-us/library/cc730606 (WS.10) .aspx

  ------------------------------------------------------------------

  ReadyBoost can help, more RAM, and ReadyBoost is even better and RAM is pretty cheap these days.

  The max supported in Vista readyboost drive is 4 GB - if you get a larger drive 4 GB you can use the
  rest for storage.

  You need a very fast car and pay little attention to the demands of the manufacturers that they are ready for ReadyBoost as
  even some slow readers claim that.

  ReadyBoost does make a difference
  http://www.PCSTATS.com/ArticleView.cfm?articleid=2160

  How to find clues of speed readyboost
  http://www.techcrater.com/2007/04/06/how-to-find-ReadyBoost-speed-rating/

  Flash memory speed list
  http://www.techcrater.com/2007/04/05/ReadyBoost-Flash-memory-speed-list/

  I use a SanDisk titanium and it does pretty well - check speed ratings users get to the Techcrater to
  help to choose the brand.

  Hope these helps.

  Rob - bicycle - Mark Twain said it is good.

• I have two 2 physical HDD (logic 1 = 2 partitions, 1 with partion unique); on all the page files will improve performance, or is an annex of page file?

  My laptop has two 2 750 GB HDD (plus a 8 GB SSD Express Cache). The first HARD disk is partitioned into 2 letters two logical sectors (~ 275 GB & 375 GB {more system/recovery NTFS partitions 2}), assigned drive C (main system partition), and D (logical partition) and the second physical disk E (750 GB). Win7Pro64 created a pagefile managed system on the C drive, but not on readers D & E. Y has an advantage, or more importantly, a disadvantage to the creation of swap files on the D & E readers?

  I am not opposed to using all the 375GB logical partition on drive D as a swap file if this can help performance, and/or create a pagefile on the E drive the same size as on the C drive, once again, to help performance.

  Can someone help me with the best approach?

  Also, I have an Intel i7-3610QM with 16 GB of RAM and a GPU Nvidia GeForce GTX G675M with 2 GB of RAM.

  Thank you.

  Hello

  The best option is to let Windows control the pagefile.

  Here's more information: http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/optimal-page-file-size/3c68f053-1248-48c9-bd10-72874834d595

  I hope this helps.

• Slow performance with laptop computer Windows 8.

  Separated from this thread.

  Nothing don't you suggested worked. I have a new laptop with Windows 8. I am extremely disappointed by my experience of this new version of windows. Maybe if I had a necessary step for companies their tablet, maybe I'd be this. However, I want my old rear windows. It of a joke and does not print the user of the operating system. Nothing is intuitive and even your description on how to do was not easy to follow.

  Hello Jennifer,

  I understand your frustration level, but if you give us the opportunity to help you with this problem, I'll try my best to help you with this. I would be grateful if you could provide the following information:

  1. What exactly is the problem that you are facing? D o you have problems to access the applications installed on the hard drive or access the Internet?
  2. What is the brand and model of the computer?

  You can try the following methods and check if they help:

  Method 1:

  Is one of the best ways that you can improve the performance of your PC by optimizing the hard disk. Windows includes features to help optimize the different types of readers who use PCs today. Any player from your PC uses, Windows automatically selects the optimization that is suitable for your car.

  Improve performance by optimizing your hard drive:

  http://Windows.Microsoft.com/en-in/Windows-8/improve-performance-optimizing-hard-drive

  Important: while performing the check disk on the hard disk, if bad sectors can be found, then check disk will try to repair this sector. All the data available in this area may be lost.

  Method 2:

  A quick way to check if your PC has a virus is to use Windows Defender. This malware protection is provided with Windows and helps identify and remove viruses, spyware and other malicious software.

  How can I find and remove a virus? :

  http://Windows.Microsoft.com/en-us/Windows-8/how-find-remove-virus

  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.

  Additional information.

  Performance & maintenance:

  http://Windows.Microsoft.com/en-us/Windows/performance-maintenance-help#performance-maintenance-help=Windows-8&V1H=win8tab2&V2H=win7tab1&V3H=winvistatab1

  Hope the suggestions help above. Please return with the required information.