Care & maintenance

How and when to clean disk/does downing loading takes place

Hello

How often depends on how much you use your computer — some do it every day, a few weeks and
much once a month. Most common is generally better if you're on the computer a lot. Yes, low-
load put files and programs on your computer, and they take place. See the space
the tips at the end of this message.

Run DiskCleanup - start - all programs - Accessories - System Tools - Disk Cleanup

You all - leave only check the minidump files if you have had serious failures.
as bluescreens, or blocks - these contain no actual useful data unless the system has been
strange problems.

Good 3rd party free utilities to help:

CCleaner - free
http://www.CCleaner.com/

Forums for CCleaner
http://Forum.Piriform.com/

Wise Disk Cleaner - free
http://free-disk-cleaner.WiseCleaner.com/disk-cleaner.htm

Also check this thread:

Performance and maintenance tips
http://social.answers.Microsoft.com/forums/en-us/w7performance/thread/19e5d6c3-BF07-49ac-a2fa-6718c988f125

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

These utilities can read the Minidump and another error collection files if you need to see what
in them there.

It is an excellent tool for displaying the blue screen error information

-Free - BlueScreenView scans all your minidump files created during "blue screen of death," collisions
and displays information about all accidents of a table.
http://www.NirSoft.NET/utils/blue_screen_view.html

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

MyEventViewer can be verified at the time of the blue screen (BSOD) within a second or so of the
time of the BSOD to provide more information about the possible cause - see TIP)

MyEventViewer - free - a simple alternative in the standard Windows Event Viewer.
TIP - Options - Advanced filter allows you to see a period of time instead of the whole of the record-
Set it for a bit before and after the time of the BSOD.
http://www.NirSoft.NET/utils/my_event_viewer.html

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

AppCrashView - free - a small utility for Windows Vista and Windows 7 which shows details
application of all accidents occurred in your system. The information breaks down is extracted from the
.WER files created by the Windows Error Reporting (WER) of the operating system component of each
time that an accident has occurred. AppCrashView also allows you to easily record the list of accidents to
text/html/csv/xml file.
http://www.NirSoft.NET/utils/app_crash_view.html

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

SPACE

Run DiskCleanup - start - all programs - Accessories - System Tools - Disk Cleanup

You may want to transfer some data, images or documents on removable media like USB keys,
External USB (my choice) or even CD/DVD readers (make multiple copies if the use of these).

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

Info:

System restore usually holds 15% of disk space and updates that are necessary for running computer
consume even more. Backup - Options of recovery and even MS updates and those of HP, Dell
or similar manufacturers use the space if your charging system. There are also overhead for the readers are not
format to their maximum capacity.

Where all my disk space? (Vista) - good writeup
http://Forum.NotebookReview.com/showthread.php?t=167983

Hard disk space Vista shrinking and reducing anomaly
http://www.mydigitallife.info/2007/07/04/Vista-hard-disk-space-shrinking-and-reducing-anomaly/

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

It will show you how disk space is being used.

WinDirStat - free - use to make sure you know what is too much space.
http://WinDirStat.info/

-Free - TreeSize tells you where precious space has gone to
http://www.Jam-software.com/treesize_free/

Also run Disk Cleanup:

Start - All Programs - Accessories - System Tools - Disk Cleanup.

Use the WinDirStat and these other tools.

DiskMon - free - an application that logs and displays all the activity of the hard disk on a Windows System.
You can also reduce DiskMon in your system tray, where it acts as a disk light, presenting a green
icon when there is disk-read activity and a red icon when there is a writing activity.
http://TechNet.Microsoft.com/en-us/Sysinternals/bb896646.aspx

Process Monitor - free - a monitoring tool for Windows that shows real-time file system,
The process/thread activity and the register.
http://TechNet.Microsoft.com/en-us/Sysinternals/bb896645.aspx

Manage - free - a utility that displays information about the handles opened for any process in the system.
You can use it to see the programs that have an open folder, or to see the types of objects and the names of all
the handles of a program.
http://TechNet.Microsoft.com/en-us/Sysinternals/bb896655.aspx

-Free - Process Explorer shows you information about the handles and DLLs processes have
opened or loaded.
http://TechNet.Microsoft.com/en-us/Sysinternals/bb896653.aspx

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

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

OpenedFilesView - Free displays the list of all the open files on your system. For each file opened,
additional information is displayed: handle value, read/write/delete access, position in the file, the
process that has the file open and more...
http://www.NirSoft.NET/utils/opened_files_view.html

I hope this helps.

Rob Brown - MS MVP - Windows Desktop Experience: Bike - Mark Twain said it right.

Tags: Windows

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                   NPIIMGION                      8.65 Concurrent Request       8.65
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    enq: TX - index contention          Concurrency           8.24       1.52
    read by other session               User I/O              7.80       1.44
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    Service        Module                   % Activity Action               % Action
    -------------- ------------------------ ---------- ------------------ ----------
    PROD           NPIWIPLR                      10.21 Concurrent Request      10.21
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                   OEXOEORD                       8.78 FRM:N11247:NPI Cus       3.80
                                                       FRM:C35809:NPI Cus       1.34
                                                       FRM:N11218:NPI Cus       1.20
                   NPIIMGION                      6.67 Concurrent Request       6.67
                   NPISLIM                        5.41 Concurrent Request       5.41
              -------------------------------------------------------------
    Questions

    (1) even if it seems he does not index unique sequence but the claim is there?
    (2) after reconstruction, we see pct_used > 110, what will happen?
    (3) prior use was 81 per cent, is higher and would lead to node splits for large indsddexes?

    Concerning
    KG

    KG says:

    Face claim to index to insert it on the big table with 27 million.
    We have solved this after purging of data to reduce the lines to 4 million and rebuild the index.
    I was against the approach to keep mind that the tree index B are self balanced do not rebuold

    First point to note - if you delete M 23 rows in a table with 27 million lines, it is probably a good idea to rebuild the table and the index to recover the space empty, unless you wait another 20 million lines to be arriviing soon and re-use of space very soon. In fact, you can use the dbms_redefinition package to extract the data you want to keep rather than a deletion. Alternatively you could actually marked as unused as an index on the table that you can get away with before to delete data and (optionally) make an area of narrowing.

    >

    Index before you purge statistics:

    SQL> select NAME,HEIGHT,BLOCKS,LF_ROWS,LF_BLKS ,LF_BLK_LEN,BR_BLKS,DISTI
    NCT_KEYS ,BTREE_SPACE,USED_SPACE ,PCT_USED  from index_stats;
    
    NAME                               HEIGHT     BLOCKS    LF_ROWS    LF_BLKS LF_BLK_LEN    BR_BLKS DISTINCT_KEYS BTREE_SPACE USED_SPACE   PCT_USED
    ------------------------------ ---------- ---------- ---------- ---------- ---------- ---------- ------------- ----------- ---------- ----------
    OE_PROCESSING_MSGS_TL_U1                3     151040   27108882     149878       4276        422      27108882   644266144  516301179         81
    
    Index stats After purge :
    
    SQL> select NAME,HEIGHT,BLOCKS,LF_ROWS,LF_BLKS ,LF_BLK_LEN,BR_BLKS,DISTINCT_KEYS ,BTREE_SPACE,USED_SPACE ,PCT_USED  from index_stats;
    
    NAME                               HEIGHT     BLOCKS    LF_ROWS    LF_BLKS LF_BLK_LEN    BR_BLKS DISTINCT_KEYS BTREE_SPACE USED_SPACE   PCT_USED
    ------------------------------ ---------- ---------- ---------- ---------- ---------- ---------- ------------- ----------- ---------- ----------
    OE_PROCESSING_MSGS_TL_U1                3      14816     4763902     14556    5644         34        4763902    82618912    90654959           110
    

    (1) even if it seems he does not index unique sequence but the claim is there?
    (2) after reconstruction, we see pct_used > 110, what will happen?
    (3) prior use was 81%, it is higher and would lead to node splits large index?

    One of the comments in one of the blogs I wrote on the index highlights a key problem: http://jonathanlewis.wordpress.com/2009/07/20/index-quiz-1/#comment-33897
    Note the LF_BLK_LEN in both cases: it is well below the 8000 bytes you get in general for an index btree, built in a block size of 8 KB. This is because the ITL list in some of the blocks sheet has grown to manage concurrent changes to the blocks, and the command ANALYZE took the biggest list ITL as typical of ALL blocks in the index. 110% and 81% are a side effect of this as Oracle took the used_space and the number of lf_blks * lf_blk_len to calculate the percenage: for example 90654959 / (5644 * 14556) = 1.1035

    You have created the index with a very large INITRANS, either a number of pads of sheets have already been under pressure concurrent insert and hit the "ITL Explosion" bug, losing a lot of inputs ITL which can not be recovered without some sort of index maintenance.

    You said that the index is not based on a sequence - but is it based on some form of monotonous increasing value (for example, a timestamp), you don't need a sequence to hit the problem you just need values that continue to increase. The problem is the number of basis 8767925 bug, fixed in paragraph 12.1 with backports available for some versions.

    Concerning
    Jonathan Lewis

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