Strange behavior of scan picture

Hi you all the gurus vigilant oracle out there...

I need some help/tips on an update that I'm running that takes a lot of time. Oracle RDMBS is 11.2.0.1 with advanced compression option.

I'm currently updating all lines in a table to a value of 1 to 0. (update mistaf set b_code = '0' ;)
The column in question is a char (1) column and the column is not indexed. The table is a heap large enough with 55 million lines to update and its size is about 11 GB. The table is compressed with compress for OLTP option.

What is strange to me, is that I can clearly see that performs a full table scan, but I see no db file read straggling, as I expect, but instead, I see only db file sequential reads. I guess that's maybe the reason for its long runtime (dbconsole estimates 20 full hours watching followed sql).

All views on why Oracle would do db file on a FTS sequential readings? And don't you think that this could be the reason why it takes so long to complete?

More info: I started the update and left the work and the next morning, I saw that the update was not yet finished that I realized that I had a bitmap on the updated column index. I abandoned the index and started the update once more... It seemed to run at the beginning before rapildy performance declining very quickly...


Thanks in advance for any help!

MrShh wrote:

I need some help/tips on an update that I'm running that takes a lot of time. Oracle RDMBS is 11.2.0.1 with advanced compression option.

I'm currently updating all lines in a table to a value of 1 to 0. (update mistaf set b_code = '0' ;)
The column in question is a char (1) column and the column is not indexed. The table is a heap large enough with 55 million lines to update and its size is about 11 GB. The table is compressed with compress for OLTP option.

What is strange to me, is that I can clearly see that performs a full table scan, but I see no db file read straggling, as I expect, but instead, I see only db file sequential reads. I guess that's maybe the reason for its long runtime (dbconsole estimates 20 full hours watching followed sql).

All views on why Oracle would do db file on a FTS sequential readings? And don't you think that this could be the reason why it takes so long to complete?

More info: I started the update and left the work and the next morning, I saw that the update was not yet finished that I realized that I had a bitmap on the updated column index. I abandoned the index and started the update once more... It seemed to run at the beginning before rapildy performance declining very quickly...

You're not an OLTP update, is not surprising that there's something wrong with your "compress for OLTP. Add to that you did a partial update, put an end to the query, (probably causing a massive cancellation) and started:

Just guessing here, but when you update each row, Oracle has decompress the line and does not re - apply the compression on the update. Then he concludes he cannot rewrite the line in the block, so the line moves. The restoration does not return the blocks in their compressed State, so on the second run you continue to follow the migrated rows - by reading one piece - to repeat the update.

Concerning
Jonathan Lewis

Tags: Database

Similar Questions

  • Strange behavior with Scan function

    Hi, I see some weird behaviors with the scan function.  Here's a code (for Interactive execution) window which illustrates what I'm struggling with:

    #include 
    static double value;//    1234567890123456static char buffer[20] = "-  24.612 g    ?";
    static int scanneditems;
    static unsigned char sign, stable;
    static char unit[6];
    
    scanneditems = Scan(buffer, "%s>%c[u]%f%c[d]%s[w5y]%c[u]", &sign, &value, unit, &stable);
    

    The buffer I'm scanning has five parts.  The first character is a sign, the next 8 characters is a floating point number, then there is a space that just throw, then five characters is a string that describes the unit, and the last character is a question mark if the reading is unstable or a space otherwise.  The problem is with the last character.  When I run the above code, the value of the variable 'stable' is 32 (space), when I expect a 63 (question mark).  The other points seem to parse correctly, including the double value and the 'unit' char array that contains [g] [space] [space] [space] [space], which is exactly what I expect that it contains.

    It seems I'm missing something obvious, probably something to do with the way that the scan function manages the spaces, but I just can't understand what it is.  Thank you.

    I'm not sure about how Scan treats spaces, but if you check NumFmtdBytes () after the scan you see 12, which means that it has scanned only the 'g' (fill the rest of 'unit' with spaces according to the modifier there) and read the character immediately following the stability.

    This line correctly reads the entire string and returns bytes 16 analyses by the function, which is what is expected.

    scanneditems = Scan (buffer, "%s > %c [u] %f %c [d] %s [-w5t] [u] %c", & sign, & value, unit, & stable);

  • HP Pavilion Slimline s5304y strange behavior and stops randomly

    To start, here is my card:

    HP Pavilion Slimline s5304y

    Windows 7 Home Premium 64 - bit SP1 Build 7601

    AMD Athlon II X processor 2 215

    4 GB of RAM, blah blah blah

    Here are the symptoms:

    -Win7 starts to act strangely, when the keys are depressed they'll keep recording (like that, but forever)

    -Then it will attempt to force the closure but I keep open Word 2007, which will block the closure and I gives me the option to cancel or to force stop word.

    -J' I usually Cancel to see what it does, sometimes it continues to operate normally, sometimes, attempts to stop become more frequent until it ask no more, and Word cannot veto the shutdown request.

    -When I look at the Event Viewer system, he says he is told what USER (me) has launched the stop, as if it were normal.

    -A little more digging in the event viewer application section says that before stopping, "HP Support Assistant Service" had a "PowerEvent handled successfully by the service" with EventRecordID of 10883.

    -Meet system Event ID 109

    Microsoft-Windows-Kernel-Power

    EventRecordID 45150

    -Meet

    "The process C:\Windows\System32\winlogon.exe (USER) has launched the power off computer USER for the user NT AUTHORITY\SYSTEM account for the following reason: no title for this reason could be found.

    Reason code: 0x500ff

    Type of closure: power off

    EventID: 1074

    [Qualification] 32768

    There is no indication that something went WRONG minidump, no discharges of any sort, sfc/scannow ran own just like chkdsk, memtest, tester of windows 7 and all other diagnostic tools.

    He did it before, but very rarely, so I thought nothing of it (which happened in the spans of the months apart) but now happened several times a day.

    Recent software additions:

    Installing the software and drivers Lexmark Prospect Pro205

    -Updated Nvidia graphics drivers Geforce 6150SE nForce 430 to 8.17.12.9573 and it's Helper service ver 295,73

    What I did to try to rectify the situation:

    -Scanned with each virus/malware free scan in existence - deleted an infected file from Java Java/CVE-2011-3544. O operate. And another unrelated to the advertising program.

    -Updated HP Assistant and Advisor

    -Updated several times with various updates for windows 7

    -Clean the case thought it was overheating, but nope - clean as a whistle, normal running time

    -Good fans checked

    -Extract from food - looked good, constant voltage

    I haven't checked the power extension cables. I heard there is a problem with shorting out on the 24-pin extensions, but I didn't have an extension of 24 pins on the power cables.

    I've heard others have had problems with HP stopping randomly with a strange behavior, so I wanted to see what you guys have to say.

    Could this be problems of power with my house? The wiring is old... Or more likely is a short circuit in the cable/PSU?

    How can I easily repair/test of this theory?

    -All right, so the system restore has nothing but destroy some files, because I couldn't not correctly backup the drive between the random stops.

    However, I found the solution to my problem, that you won't believe.

    Short answer: I replaced the stock HP keyboard (model KU-0841) who seems to have been short.

    The long answer:

    -When the computer kept shutting down even in safe mode after a destructive recovery, I started watching again material.

    -Noticed my typing would sometimes record, sometimes just go crazzzzzzzzzzzzzzzzzzzzzzzzzzzy (like this).

    -Then comes the keyboard no longer works. Thus, while the veto stops with WORD 2007 and using the keyboard on the screen in Win7, I thought it was a terrible virus - it wasn't.

    -When I unplugged the USB keyboard it's a strange electric 'bzz' sound, like what you hear when static is unloaded. It turns out that the USB port has been be short-circuited by the keyboard.

    On the keyboard and the USB plug was going well, so I don't know who is to blame again, however - if someone is having the same weird problems with events of the power of the nucleus and 1074 with 0x500ff errors-try to check your hardware.

    After replacing the keyboard, everything works perfectly.

  • Strange behavior of PE10 do not ask for disks 2 and 3.

    My computer complies with the system requirements and I have a brand new PE10 "closed". The box has three discs. I installed disc1 and serial number and told me not to install the other two disks. Installation was surprisingly closed. There is a shortcut on the desktop PE10 and PE10 is located in the Program Files folder. I can open PE10 with the shortcut on the desktop and everything seems to be there.

    I felt very uncomfortable so I uninstalled disc1 and reinstalled with the same results. I used PE4 for many years, so I'm used to Adobe Photoshop Elements. I have dozens of files in MY PICTURES, I want to implement PE10 but I didn't in case something is wrong.

    Can someone explain why, I was told not to install dics 2 and 3?  Are they necessary?

    cogleylane

    From: 99jon

    Sent: Thursday, April 12, 2012 14:23

    To: cogleylane

    Re: Strange behavior of PE10 asking only not for disks 2 and 3.

    Re: Strange behavior of PE10 asking only not for disks 2 and 3.

    created by 99jon in Photoshop Elements - discover complete discussion

  • strange behavior while I work on my form.

    Hello world
    I realize strange behavior while I work on my form.
    I realize that the number of tables are becoming bigger and bigger.

    I did a check in sql liked and realized that there are other tables system inside... I remember for my project, I started an own database.

    http://img18.imageshack.us/img18/779/oracle.th.gif


    can someone tell me if I have to remove them? and if so, how to remove?
    and also how can I prevent it from happening?

    Edited by: diskhub may 7, 2010 01:02

    Hello

    I realize strange behavior while I work on my form.
    I realize that the number of tables are becoming bigger and bigger.

    I couldn't see any problem form here. I think it has to do with the database. But seeing the picture I think you use the 10 g or version and you dropped some tables. Database is in the Recycle Bin you can delete from the Recycle Bin by using...

    PURGE RECYCLEBIN;
    

    can someone tell me if I have to remove them? and if so, how to remove?
    and also how can I prevent it from happening?

    This statement will drop the table and will not keep in the trash of db.

    DROP TABLE TABLE_NAME PURGE;
    

    But personally I would not not to use because in error table is deleted if we can use flashback to go back. But there are also some restrictions.

    If the link below also.
    http://www.Oracle.com/technology/pub/articles/10gdba/week5_10gdba.html

    -Clément

  • Strange behavior Navigation bar

    I am designing a web page for not-for-profit organization.

    Unfortunately, I'm running into some strange behavior problems with the navigation bar.
    The tabs in my run from the left navigation bar. The links to the left of the link, which is never active links are visited through the navigation bar, stop working. For the life of me I can't understand why!

    The pages are arranged so that each page has three html files. File of a single body, a single navigation bar with its tab file respective hilighted and a small file that simply loads the two, one above the other. The tabs in the navigation bar are related to the file then load the body and navigation (of course). Click on a tab to the right of the current tab loads everything perfectly. However, if the active tab is the tab more right, the tabs on the left no longer work correctly. They seem to recharge of the navigation bar, but the body is left behind and the URL always seems to be the right-most tab.

    Here is an example of my current site: current Site
    Through the four tabs at the top, you can quickly see things go wrong.
    The drop down menu allows access to the same pages that the navigation bar won't load.

    If you could please take a look at the site and respond with comments or suggestions as to what could go wrong or that I could do about it, I would be very grateful.

    Note that I already read something about strange navigation bar behavior caused by names starting with the picture number. This is not what is happening here, as are the names of my image "image 1" etc.

    Also note that I use dreamweaver8

    Thanks in advance for your help.

    -Paul M
    -Transitions for youth
    [email protected]

    They are all coded the same. Some have target = "_top" and it varies from one page to the next.

  • Firefox crashes (and other strange behaviors) due to gifs

    From a recent update Firefox displayed a strange behavior that surrounds the gifs. Sometimes, after viewing pages with a large number of gifs or several very large gifs, Firefox will do things like not animate gifs, or even do not load the images at all, an and will not stop until I have restart Firefox. What's more concerning is that sometimes in these situations, Firefox will simply hang and stop responding, forcing me to kill the process.
    This page shows the behavior of hanging fairly regularly: http://www.neogaf.com/forum/showthread.php?t=1021843 & page = 21
    It seems more likely to happen when I scroll the page quickly. The behavior persists when I restart Firefox mode without failure.

    39 of Firefox seems to have solved the problem.

  • I get a strange behavior of the bar tabs and the address bar in Firefox 29,0 for Mac.

    I just installed Firefox 29,0 for Mac.
    I have a strange behavior of the bar tabs and the address bar with this new version.
    Instead of the address bar, I get two rows of symbols. And it is impossible to write anything in the address bar.
    (I add a screenshot, but I can't find a way to do it).

    Firefox has an RSS icon in the palette of the toolbar that you can drag a toolbar (but not on the location bar container).

    • Firefox menu button > Options/Preferences > toolbars
    • View > toolbars > customize
  • Strange behavior USB Flash Drive Satellite A100-626

    Hello

    I did install Windows Vista Business Edition on my Satellite A100-626 (PSAA9) following the instructions provided in the Web page of drivers.

    So far, everything works as expected, except for one little (or no) question.

    When I ask Vista to 'Remove hardware safely' my USB Flash drive, a Popup appears telling me to remove it. So far, so good :D

    The only thing is that the flash player is not put out as could be expected and and yellow question mark appears in Device Manager.

    Opening of the question mark can read what follows:

    "Windows cannot use this hardware device because it has been developed to remove safely, but it has not been removed from the computer. (Code 47) To resolve this issue, disconnect the device from your computer and plug it in again. »

    Following the instructions above, the light turns off, lol...

    Someone else met this strange behavior? If so, any solution?

    I tried a few USB flashes that run well on XP and they both do the same thing.

    Thank you, Nuno!

    Hi Nuno

    It's very strange. I have the Satellite A100-504 (comes with Windows XP Home edition). Last week, I installed Vista and all the stuff followed Toshiba document instructions facilities. I use the mouse wireless, external HDD USB web cam. With the help of these external devices together I never noticed a similar behavior.

    You have the same situation with all the USB ports?

  • Can I scan pictures directly in the Photo app

    Is there a way possibly using the constructor I can scan pictures directly in the new Photo at Yosemite app? Thank you.

    No idea what "the automaker" is

    You can use image capture (in your applications folder) to scan pictures directly in the Photos

    LN

  • redeclenchables strange behavior digital output

    I created a redeclenchables digital dashboard task (finished) digital output as follows: (in DAQmx C)

    DAQmxCreateTask("",&_taskHandle);
    DAQmxCreateDOChan(_taskHandle,"/Dev2/port0/line6","",DAQmx_Val_ChanPerLine);
    DAQmxCfgSampClkTiming (_taskHandle, "" / Dev2/Ctr0InternalOutput ", _clockRate, DAQmx_Val_Rising, DAQmx_Val_FiniteSamps, static_cast (_sampleCount)");
    DAQmxCfgOutputBuffer (_taskHandle, static_cast (_sampleCount));
    DAQmxCfgDigEdgeStartTrig (_taskHandle, "/ Dev2/PFI4", DAQmx_Val_Rising ");
    DAQmxSetStartTrigRetriggerable (_taskHandle, true);
    DAQmxWriteDigitalLines (_taskHandle, static_cast(_sampleCount), FALSE,-1, DAQmx_Val_GroupByChannel, _pDigital, NULL, NULL);
    DAQmxStartTask (_taskHandle);

    sample clock:

    DAQmxCreateTask ("", & _taskHandleCO);
    DAQmxCreateCOPulseChanFreq (_taskHandleCO, "/ Dev2/ctr0","", DAQmx_Val_Hz, DAQmx_Val_Low, 0,0, _clockRate, 0.5 "");
    DAQmxCfgImplicitTiming (_taskHandleCO, DAQmx_Val_ContSamps, _numSamples);
    DAQmxStartTask (_taskHandleCO);

    When I run the task without redeclenchables parameter, it output a correct signal. However, if I run with redeclenchables it out almost exactly 2 times faster than normal. For example, a pulse whose width of 10 ms became 5 ms and repeats again to be 2 pulses of 5 ms. This is repeatable, no matter how much or how fast triggers provided.

    My card is PCIe-6363. I do not know what causes this strange behavior, and I hope someone can help on this.

    Thank you.

    It disappears after reset configuration. Might be interesting for future reviews.

  • Strange behavior with the function «Help in command line»

    So I do a little playing with the opening of the files compiled help (.chm) with the command-line help feature, and I saw a strange behavior when trying to index multi-level access keywords. According to the documentation, if you set the 'Key' operation, you can enter a value for ' string to search for "to access this section. The more precise help that:

    If this string contains a keyword index, the string must match the key of the index as it appears in the help index file. To access a topic with a multilevel index keyword, enter the keyword of the top-level index, a colon and the keyword of the second level index. Do not separate the elements with spaces. For example, a chain of error codes: GPIB jumps about a subject with a keyword of top-level index of error codes and a second level keyword index of GPIB.

    All right, seems simple enough. Except that when I tried, I couldn't work, even with the example provided. I tried the following simple test:

    Opens the help file, but it opens to this page, not to the page ' error codes: GPIB "non-descript. I saw this in 8.2 and 8.6. Anyone have any success with access to a multi-level keyword?

    Note - side

    Curiously, the Index for the help lvconcepts.chm file looks like this:

    In other words, the input index text is just "GPIB", but the text that appears in the keyword field is "codes error, GPIB. I'm curious to know how this was accomplished. I decompiled the lvconcepts.chm file and watched the .hhk file, and it is not immediately obvious to me. (By the way, if you try to use "error codes, GPIB" it does not either).

    Hello

    Please contact National Instruments!
    It is a very strange behavior.  I tested out and seen the exact
    same results you are experiencing.  This was reported to R & D (AUTO ID # 130246) for further investigations.
    From what I can tell the a possible workaround solution that we have documented
    in the post of root Canal.  I can't continue to look into this in order
    to see if there is no other workaround solution or a reason why it is
    run in this way.  Thanks much for the feedback!  If
    you have any other questions on this subject please post them here.
    Have a great day!

  • Strange behavior file open/create/replace

    Hi all

    I will make my question as broad as possible because I think someone must have met this behavior before. I use the function open/create/replace file to programmatically open a file, giving a path entry created in an earlier vi. Strange behavior, I see, is that although Labview returns 1 error when I give my file programmatically, it reads the file OK if I give as a constant. The constant path that I give is exactly the same as one I am tryinng to programmatically.

    Any suggestions? Is it to do with a string formatting problem? I enclose my portion of treated VI the path_in section.

    Thanks for your time,

    Kind regards

    Harry

    Wild guess: you must use 'build path' instead of 'concatenate strings' build path.

    (Also use a constant of diagram of the path (not a string!) to "c:\ni-rt\" and get rid of the "trim whitespace' and the 'chain of path")

    See if that makes a difference. (build path is OS independent, while the operations of independent channels are not).

    Never use the paths as strings. There are very few cases where this would be appropriate.

  • Issues coming out of "sleep mode" and strange behavior when restarting with GPU

    I use a desktop computer HP P7-1240 completely stock except for a GPU EVGA GeForce GTX 750 TI SC. The GPU works well when the computer is running (which is strange because the forums have several other discussions mentioning the 700 series must be incompatible with my BIOS).

    However, there are two main strange problems that have arisen since the installation of the GPU. One is that, every time that the computer enters mode "sleep", he refuses to wake back up correctly. It seems to me that the computer active but sends all the signals back panel (at the very least, no video because my monitors remain blank). On rare occasions, he wakes back correctly, but at least 90% of the time, it must be restarted. Upon reboot, the same problem sometimes (not), and the computer must be rebooted a second time until it will start again.

    This leads to the second problem. During startup, the computer goes to a black screen, listing the specifications of basic computer skills (see attached photo. In this screen, the computer does not meet any entry.  He proceeds to beep 3 times, all the same length and height spaced about 30 seconds of gap. After the third beep, the screen goes black and then the computer starts normally with no other strange behavior.

    Without the GPU, none of these problems occur. At the very least, not regularly.

    I saw another thread mentioned that, while the HP support for my office page lists not her, there is an update of the BIOS for my motherboard which has fixed issues related to the GPU more modern. By nature it is an update of the BIOS that does not (seem to) officially support Windows 7, I am reluctant to go forward with this potential solution.

    Although I intend to build myself a new computer from scratch at a certain point, I was hoping to get at least another year out of this machine, if not 2.  While this question does not seem to be immediately threatening the stability of the computer, I can't help but think that it is a question should I go quickly to avoid future problems (not to mention it would save me a good amount of electricity to be able to enter the mode 'sleep' on a regular basis).

    Any suggestions would be greatly appreciated!

    Problem has been solved!

    For those of you who have trouble sleeping with the p7-1240 or computers with a card mother identical (MSI Jasmine Ms 7778 ver 1.0), I suggest that you follow this thread:

    http://h30434.www3.HP.com/T5/desktop-hardware/unable-to-boot-with-new-graphics-card/TD-p/3930544/highlight/true

    It is to use an update for your BIOS that is intended only for PC under Windows 8, but that seems to work perfectly well with Windows 7 PC. It solved my problems of sleep and makes the computer to behave at least semi normally while restarting.

    However, as indicated in the wire, an update of the BIOS should be a last resort because it can turn your machine into a very heavy and expensive paperweight if something does not work. Do not forget that you have the worm 1.0 card mother MSI Ms 7778 Jasmine and remember that you update the BIOS version 8.18.

    As I am looking for 2aeo on HP.com currently (according to the thread leading up to), I'm not find the same links I found last week when I went through the update. However, you can find elsewhere.

  • My HP photosmart 6510e all-in-one scanning pictures in black and white but the docs are still in color.

    Scan pictures into my a6683w HP Vista in black and white, but the documents still scan in color.

    Hello there ingridt, welcome to the Forums!

    I noticed your post on the scans of your Photosmart 6510, scan to your system from Vista in black and white. I want to offer my suggestions to you to see if they can help you with this.

    First of all, try to launch the HP print and Scan Doctor who is used to fix the printing and scanning problems. You choose the option "Scanning" when the tool is run. It will inform you if the software is completely installed, or if there is a problem, it can not correct. If it detects an error and shows you a red 'X', I suggest then uninstall and reinstall.

    Here are some links to help with uninstalling and reinstalling if you happen to do these steps.

    1. uninstalling the printer software

    2. restart your PC

    3 reinstall: Photosmart HP 6510 e-All-in-One Printer - B211a

    Try a scan now and let me know how make you out!

    Good luck!

Maybe you are looking for

  • Satellite 5100 - error code: 4 short Flash, 1 x long, 3 short films

    Hi all After I accidentally served Coke for my satellite 5100 503, it was totally cut off. My brother managed to clean it up, and it began. But shortly after, she turned to and just give this error message by flashing the power before conduit: 4 x SH

  • HP Elite m9150f - signal VGA No.

    Member of the family has a HP Elite m9150f with motherboard chipset Intel G33 Asus IPIBL-LB, vidio integrated Nvidia 8500 GT and HP W1907 LCD Monitor processor.  The monitor has always been connec ted to the PC DVI port via the VGA - DVI adapter.  Re

  • NVBackup

    I had many recommendations to install Nvbackup to my Treo 755 p.  I am wrong in that this program install on an SD card and not actually on my Treo?  Where can I get this program and details on its use.  Thanks for the help.

  • HP x 2 PRO 612 G1: PRO HP x 2 612 G1 BIOS locked - help

    I bought a HP opportunity x 2 PRO 612 G1 (Tablet PC) on ebay and the BIOS is locked. I want to update the BIOS to the HP last update but unfortunetly I can't update because I do not know the password. If anyone can help me that would be wonderful. Wh

  • eprint is broken? There is no status page

    I have a laser jet m475dw. When I click on the apps button it displays "downloaded from the Internet" for several minutes and then fails. Unable to connect to the service is the error message and asks me to try again or ok to cancel. When I log onto