What are the 'additional Control Point', 'current log tail' and RBA

I myself messgae in the alert log file
Incremental checkpoint up to RBA [0xe.58bfe.0], current log tail at RBA [
In reading articles on Oracle and the Oracle documents, I have also come across these three terms much
Incremental checkpoint
current log tail 
RBA
I really want to know what they are in a short and clean definition. Lengthy discussions are devoted to "Incremental Checkpoint" in the url
Incremental Checkpoint
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:19311485023372
But I got confused.

There are many different types of control point - the thing they have in common is that they require the database writer to write disk blocks (see the last part of this post: http://jonathanlewis.wordpress.com/2007/04/12/log-file-switch/).

The "additional control point" is simply the name given to the event of control point which is scheduled to occur every three seconds and allows dbwr to write of disk blocks that have first changed more than a certain distance in the past.

In this context, RBA means 'redo the address bytes' (address of block redo only sometimes) identify a location to a redo log file.
The 'end of the newspaper' is the latest ARI redo entry written in the restore log file growth.

In a control post additional dbwr derives a value for a Resource that represents a previous point in time and written on the disk of the data blocks that have been changed by generated redo before RBA and have not been written to disk since this change.

Depending on the configuration of your settings file the previous RBA may be derived in a time lag, a volume of roll forward or the number of blocks of data that have to be modified for the IRA at the end of the paper (actually).

Concerning
Jonathan Lewis
http://jonathanlewis.WordPress.com
http://www.jlcomp.demon.co.UK

Published by: Jonathan Lewis on June 27, 2011 23:15
Improved the writing and editing of a fault.

Tags: Database

Similar Questions

  • What are the differences between pga memory max session and pga session in memory?

    Hi all

    What are the differences between pga memory max session and pga session in memory?

    SELECT s.sid, n.name, s.value FROM v$ sesstat s, v$ statname n

    WHERE s.statistic # = n.statistic #.

    AND n.name = 'pga session in memory. "

    SELECT s.sid, n.name, s.value FROM v$ sesstat s, v$ statname n

    WHERE s.statistic # = n.statistic #.

    AND n.name = 'pga memory max session ";



    Note that I have read the documentation. However, it is not clearly explained.


    Thank you

    John Stegeman wrote:

    I agree with the comments of the Ed, NightWing.

    You do not have a story to ask questions that are clearly answered in the documentation.

    Mind your own business. If you answer the question, so answer! Otherwise, please stop the thread engrossing.

  • What are the differences between Windows XP Home Edition and Windows XP Pro?

    What are the benefits of Windows XP Pro on Windows XP?

    Tuesday, December 14, 2010 22:24:33 + 0000, Dave1939 wrote:
     
    > What are the advantages of Windows XP Pro on Windows XP?
     
     
    First of all, note that it is not Windows XP Pro and Windows XP, there
    Windows XP Pro vs Windows XP Home Edition.
     
    XP Home and Professional are identical except that professional
    includes a few features (primarily related to security and networking)
    away from home? Most individuals need not and would never use
    These extra features and will see no benefit from the upgrade.
    For details, go to
     
     
     
     
    Also note another point, not included in one of the foregoing:
    Professional only allows ten simultaneous network connections and home
    5.
     
     

    Ken Blake (MS-MVP)

  • JDK 6 What are the suggested entry points to package such a request?

    Hi all, no need to mention that I love this forum and the help I received from its members, thanks to you all.

    The question is, what are entry points necessary in JDK 6 for an IDE like net beans or INtellij Idea use it without problem.

    I already packed beans net successfully, but only the application, is - can package the application and the JDK 6 at the same time, so you don't need to download the JDK 6 on all computers?

    IntelliJ Idea was packed, but is very slow to open and time do not know why.

    Thanks for everyone to contribution for an answer...

    MrBean344

    You can capture togather JDK and NetBeans or separately.

    The second way gives you a possibility to update the JDE without recapture NetBeans.

    You must uncomment OptionalAppLinks = Plugins\ *. * (. is better than *.exe) in captured NetBeans project.

    After the construction of NetBeans, you can create the 'Plugins' folder and put there most recent captured JDK (remember to change the paths in NetBeans parameters).

  • What are the differences between 12 c version 3 and its beta?

    Hello

    I found just the note of full version with "What's new" already present in beta.

    Etore

    NuGet support is the main difference between the beta and production. Kerberos is now supported in some configurations. In addition, you don't need Oracle.ManagedDataAccessDTC.dll for applications distributed transaction if you use .NET 4.5.2 or higher.

    The rest is bug fixes and support for the latest Visual Studio 2013 updates.

  • What are the differences between CHKDSK, SFC/scannow, PAM * and repair disk OS?

    Given that these different methods that might help you to repair windows, I want to know what the exact use of each of them. Like what they do, replace the files or write new files or they extracted a backup location? Etc. This will help me to understand when to use these functions in a time of need.

    * PAM as protect and/or replacement of windows files?

    Please try to post links not only but rather explain it to me, kb articles don't really explain it to me a lot.

    Thank you

    -Alex.

    You have not run zee "experiment" on rundll32.exe yet, right?

  • What are the requirements with respect to a processor and hard drive and memory is required to run windows seven effectively?

    Can I just move from XP to windows 7 without loosung files already under Xp.

    While XP is allowed as a way to upgrade to Windows 7, you must perform a new installation ("custom"). It is always wise to backup your data on external media (burn DVD, copy to external hard drive, etc.) before you do anything too drastic to install a new operating system.

    Upgrade paths - http://technet.microsoft.com/en-us/library/dd772579%28WS.10%29.aspx
    Excellent how-to for upgrading to Windows 7 - http://lifehacker.com/5385127/prep-your-pc-for-windows-7
    What Windows 7 is right for you? Excellent comparison by CNET reviews - http://reviews.cnet.com/8301-31012_7-10379487-10355804.htmlStop
    Windows 7 system requirements - http://windows.microsoft.com/systemrequirements

    Step-by-step: Windows 7 upgrade and Migration
    http://TechNet.Microsoft.com/en-us/library/dd446674%28WS.10%29.aspx
    Make sure that your hardware is supported in Windows 7. You will need drivers. You can find them in either the OEM (HP, Dell, etc.) If you have this kind of machine or mftrs of individual hardware components. (motherboard, video card, etc.).

    MS - MVP - Elephant Boy computers - don't panic!

  • PC notebook Acer Aspire 5734Z... What are the USB ports... USB2 and USB3? Thank you

    About to buy 500 GB 2.5 "HDD USB in order to create a System Image (& also to store back ups).

    Seems the type of USB connection makes a big difference of speed of transfer of information?

    Anyone know that USB is mounted in the ACER ASPIRE 5734Z? 2 USB or USB 3?

    Thank you

    USB 2.0

  • Does anyone know what are the causes after effects CC gui flicker and stop responding?

    I used AE for a long time, but it recently using AE CC 2014 on the high-end Windows 8 machine randomly

    stops responding and flicker of minutes at a time. I have card K6000 and 32 GB of ram. Have you tried

    up and down the graphics card drivers, but it still happens. I saw a couple posts on other

    forums but there seems to be nothing conclusive

    I was able to minimize the problem of flicker by adding quick SDDS.

    Original with a lot of flicker setting:

    Video source R3D files on a disk HARD USB3
    Hiding on a regular 7200 RPM HARD drive - I think the cache was on a 100 GB

    New parameter

    Video files R3D on SSD
    A 2nd SSD - cache cache size 300 GB

    GUI flickering appears very little.

    Funny thing: using the SSD quick GUI bug performs even better now _ it sparkles faster and works abandonment (CTRL_ALT_DEL) answers more quickly.

    I hope this helps. In my case, I lost my nerves and quickly bought equipment to counter that (software?-system?) bug.

  • Confused about "additional control Points.

    Hello

    I'm confused about this sentence from database Concepts 11g Release 2 (11.2)

    Additional control points

    An additional control point is a type of thread control point in part intended to avoid writing a large number of blocks online redo log switches. DBWn checks at least every three seconds to determine if he has to do. When DBWn written stamps Sales, it advances the position of the control point, causing CKPT write the position of the control point to the file control, but not for data file headers.

    I thought that a checkpoint is written datafileheader and controlfile, this happens for example after a switch logfile - right?

    So, why not in the case of additional control point? For best performance?

    Additional control points to reduce the time to recover, as more data is committed to the files of data, right?

    Concerning
    Christian

    efa78257-b5f4-4db1-8222-007be18d15aa wrote:

    Hello

    I'm confused about this sentence from database Concepts 11g Release 2 (11.2)

    Additional control points

    An additional control point is a type of thread control point in part intended to avoid writing a large number of blocks online redo log switches. DBWn checks at least every three seconds to determine if he has to do. When DBWn writes buffers of Sales, it advances the position of the control point, causing CKPT write the position of the control point to the file control, but not for data file headers.

    I thought that a checkpoint is written datafileheader and controlfile, this happens for example after a switch logfile - right?

    So, why not in the case of additional control point? For best performance?

    Additional control points to reduce the time to recover, as more data is committed to the files of data, right?

    Concerning
    Christian

    There are many types of control points. One that will be updated on the headers of data files would be a complete control and would be applicable to the entire base. The additional control point is induced to keep on enhanching a counter that would ensure that only certain limited stamp Sales would be recovering. That's why a moment of the additional control point, data file headers are not being updated. Control file is probably updated with a "pointer to disk" which mentions the point up to which the dirty buffers are written in files (from the buffer cache) data and where to start the recovery, if necessary. Log file switch will cause a thread control point which, for one instance, would be considered a Global checkpoint only. The additional control point would be for various other reasons such as setting a value for the parameter Fast_Start_Mttr_Target etc.

    HTH

    Aman...

  • Reinstall XP on Portege R600 - what are the necessary drivers?

    Hello

    I am plan to reinstall windows, since something (a driver/program/idontknowwhat) seem to access my hard drive at random times (often), which means that ever, it stops turning and still makes noise. It was already the case (but a little less than now) with preinstalled system, even with wdfrgmgr.exe disabled and without using a swap file on the hard drive, so since I don't know what are the causes (is - anyone here know?) and since it seems impossible to upgrade to an SSD, I'll just install a clean winXP install only necessary basic stuff (especially not all control panels).

    I would like to know what drivers from the Web site are essential and those that are not.
    I'll definitely install base drivers common Module, driver Display Driver LAN, HDD Protection Utility, Power Saver, his Driver, Touch Pad Driver, Webcam Driver, Wireless LAN Driver (Intel).
    I will not install (but maintaining install files on my disc for emergencies) acoustic silencer, Assist, Bluetooth Monitor, controls, cooling running Diagnostic tool, DVD player, Management Console, password, PC, PC monitor diagnostic, tool utility utility boot memory SD SD utilities, security help, SSD Alert, power utility Touchpad utility , USB Sleep & charge utility, utility zoom. I'm missing something essential (and obviously not in name) by installing is not it?

    * Now my other question: which with other drivers? I don't know what they are doing here is so my doubts since the following drivers: *.

    (1) pilot 3 G and 3 G RF power control utility: is this necessary if I never use it, or do not install the power utility will lose power (thus reducing my battery life?)

    (2) Intel Active Management Technology and Intel Matrix Storage Manager: is it necessary that the machine works correctly? I can't find the right information anywhere.

    (3) chipset utility: I am surprised it is not called driver... it is some control panel I don't need or is it actually a driver?

    (4) ConfigFree, hotkey wireless and Wireless Manager: my wireless internet will work without it?

    (5) display device Exchange & Hotkey utilities for display devices: these do what exactly?

    (6) microphone effect: is it only the echo canceller or also a necessary micro driver?

    (7) mobile Extension: what is it exactly?

    (8) trusted Platform Module: is it necessary to install this if I am not using any other explicitly related function?

    (9) public services: this product contains all I need to install the drivers? Or is it just a bunch of utilities like his name?

    Thanks in advance!
    Peter

    (1) you have not need drivers 3 G, if you do not use 3 G

    (2) Yes, you need to install these devices from Intel, they are important.

    (3) the Chipset driver is probably the most important of all drivers. Toshiba common modules is also very important. You must install these two before anything else.

    (4) Yes, we must still work. You can install the keyboard shortcut, so you can enable or disable Wifi on and outside

    (5) you need to install these, they support some features of the Fn key, so you can use an external monitor, etc...

    (6) I don't think that you will need. If you encounter problems with microphone, install

    (7) install the Mobile Extensions if you have a Port Replicator.

    (8) If you do not use the TPM encryption, simply disable it in the BIOS

    (9) you must install the utilities, so you can change the hardware settings within Windows.

  • What are the causes my print spooler continues to operate, and quickly stop again when I restart it? Lexmark P4350 - Windows 7 Edition home premium

    What are the causes to stop working during printing and stop again shortly after I start my print spooler. I also find that my printer takes a long time to start printing after I clicked "Print". I use an all-in-one printer Lexmark P4350 on Windows 7 Home Premium.

    David

    Hi David,

    Thank you for the update.

    Use all the dependency services?

    The solution for slow printing is the print spooler reset.

    When we press the Windows key + R, a window opens. This is called the immediate window.

    I suggest you to uninstall and reinstall the printer drivers and check. Lexmark is not Windows 7 compatible drivers for the printer. So, you can download the drivers for Windows Vista and install in compatibility mode.

    Follow the steps to install in compatibility mode:
    a. right click on the driver installation file and select Properties and then tap or click on the compatibility tab.
    b. check the box run this program in compatibility mode .
    c. press or click the menu drop down and select a previous operating system, and then tap or click OK.

    Reference:
    Video: Compatibility of software and hardware in Windows 7

    http://Windows.Microsoft.com/en-us/Windows7/help/videos/software-and-hardware-compatibility-in-Windows-7

    Let us know if the problem persists.

  • What are the causes of the log of user account on missing cursor in Windows XP? I have two trays of office that they have this same problem. If you restart them the cursor returns?

    What are the causes of the log of user account on missing cursor in Windows XP? I have two trays of office that they have this same problem. If you restart them the cursor returns?

    Hi DaddyJeff,

    1. don't you make changes before the show?
    2. are you referring to the cursor in the area of user password on the login screen of Windows?
    3. when the cursor goes missing, the mouse pointer works on screen?

    It is difficult to say what is causing this problem. If the mouse pointer freezes or stops working, then we recommend you to reinstall the mouse. To do this, try the following steps:
    a. sign in to Windows.
    b. Click Start, click Run, type devmgmt.msc, and then click ok.
    c. in the list of objects, expand mice and other pointing devices.
    d. right click on the sub element and click on uninstall.
    e. unplug the mouse and plug it back.
    f. the Device Manager, select an item in the list, click the Action menu, click scan for hardware changes.
    g. check if the mouse is detected, if so, then install it.

    See mouse USB which is connected to a USB 2.0 hub is not detected by Windows XP


    Note:
    if the problem persists, restore the computer to an earlier time. See How to restore Windows XP to a previous state

    Visit our Microsoft answers feedback Forum and let us know what you think.

  • What are the relationships between the logging and IKM?

    What is the best method to use in the following scenario:
    I have about 20 tables with the large amount of data sources.
    I need to create interfaces that join the source tables in target tables.
    The tables are inserted every few seconds with about hundreds of thousands lines.
    There may be a gap of a few seconds between the insertion of different tables that could be attached.
    The source and target tables are on the same Oracle instance and schema.
    I want to understand the role of: 'Logging CDC' and "IKM - incremental" and
    How can I use it in my script?
    In general, what are the relationships between "Logging" and 'IKM '?
    Use both? Or maybe it's better deelte and insert the target tables?

    I want to understand what is the role of "Logging CDC"?
    Can 'IKM - incremental' work without "logging"?
    Must 'Logging' have PK on the tables?
    What should I do if I can't say PK (there may be several identical lines)?

    Yael thanks in advance

    user604062 wrote:
    Hello
    Thanks for your quick response!

    No probs - its still fresh in memory I did a major project on this topic last year (400 tables, millions of lines per day (inserts, updates, deletes), sup-5 minute latency). The problem is it isn't that well written on the web, that you have read the blog of the example I linked to in my first answer? See also here: http://odiexperts.com/changed-data-capture-cdc/

    Always on logging:
    My source table is inserted all the time.
    The interface to join the source table in the target table.

    In ODI, the correct term would be your source table "fits" in the table target, unless you mean literally that want to join the the source with the taget table table? My question if you want to do with the result of the join?

    What exactly the "journaling" CDC updates?
    It updates the model of ODI? interfaces? The source of data in the model of ODI? The target table?

    Logging CDC configures and deploys the data capture mechanism (Triggers or log based capture, IE Logminer/streams/Goldengate) - it is not updated the model as such, she pointed out the metadata of the model of ODI repositoty as a CDC data store, allowing you, the developer say ODI to use log data if you wish (reported in the interface) There is no change in the target table, you get an indicator of metadata (IND_UPD) against a line during the integration (in C$ and I have tables$) that tells you if its insertion (I) and update (U) or deletion (D). It had ' lines allow you to synchronize the deletions, but yoy say its inserts only then you probably used use this option. "
    So the only changes are the source table to your interface, another diary data (if you use logging) or the table of the actual source (if not using the logging).

    This is the main thing that I don't understand!

    I hope I made a little clearer.

    Try the following as a quick test:

    Reverse a source table an engineer and the target (at least) table.
    Import the update incremental LKM and IKM.
    Import of the JKM you want to use.

    Create an interface between the source and the target without any deployed JKM.
    Configure the options of JKM on the model, the "Start log" to start the process of capture - this is quite a complex stage and a lot of things to understand what is happening in the source database, better to check code ODI sends to the database and to review the documentation of Oracle database for a description of what his weight (instantiate Tables (, sets of creating change, creation of subscribers etc. establishment of newspaper groups, creating views Journalising etc.) -you will need to consult your Source DBA database initially as ODI wants to make many changes to the source DB (in mode Archivelog process max, parallelism, size, Java etc.)

    Now, edit your interface and mark the table source for use "Journalized data bank.
    Restart your interface
    Compare the difference in the generated code in the journal of the operator, see the differences of the operator.

    >

    Thank you, Yael

  • What are the KEYstroke (s) used to CLOSE the current tab in the web browser?

    What are the KEYstroke (s) used to CLOSE the current tab in the web browser? I hesitate to use a mouse where can I use sequences of keys, as the mouse is a much slower process. Indeed, to find a list of all the main features that can be used in Firefox, for example ALT + S, followed by R (or several times) and the ENTRANCE used to restore the last browsing session; or CTRL + F to search for a specific word or term? Thank you.

    CTRL + W closes a tab at a time. It also closes a window if there is only one tab open in this browser.

Maybe you are looking for