question abount undo and Redo

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• When doing an insert, which undo and redo do

  as it is said

  When you insert a row, or perform any other DML, Oracle will write information in the Undo tablespace that can be used to cancel the operation. If the user issues "rollback" or there is another reason does not commit the transaction, Oracle is going to undo the change, where the name. Roll forward is a recovery mechanism that allows to replay transactions. The redo records do what they say, they have left Oracle recreate or redo the transaction. Undo and redo go hand in hand. Indeed, Oracle writes both the cancellation and the restore information by progress in online redo logs.

  I recommend reading the Guide of the Concepts for more information.

  See you soon,.
  Brian

• What is the difference between undo and redo?

  I'm confused about the term.

  Fortunately they are documented:

  Each Oracle database must have a method of maintenance of information allowing to make back, or cancel, the changes to the database. These > information consists of documents from the actions of the operations, especially before they committed. These records are collectively > as Cancel.

  from: http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/undo.htm#sthref1466

  The most crucial structure for recovery operations is the redo log, which consists of two or more pre-alloues files that store all changes > made to the database when they occur. Each instance of a data base Oracle has a newspaper again associated to protect data in the case of > a defect of the instance.

  from: http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/onlineredo.htm#sthref850

  Do some research here, and you'll get tons of info:
  http://download.Oracle.com/docs/CD/B19306_01/index.htm

• Y at - it a tip for Undo and Redo to work?

  I tried all possible ways to use two fingers to swipe back, but I can't get the cancellation or reinstatement for work on my iPad mini. Does anyone have any tips for this?

  The gesture is not easy to use and it is only available for cutting and selection in the content-aware fill then we actually disabled in our 1.0.1 update. We are the reworking in our next release.

  If you really want to try, keep your two fingers on the screen and quickly swipe left or right. Keep your fingers too long will turn the pan gesture. I hope this helps.

• How can I add a right click Menu mouse to click 'CANCEL' * and * "REDO" button to change the text in Firefox?

  How can I add a Menu with the right mouse button to display a "UNDO" AND "REDO" button to change the text back in Firefox without losing or forgetting the changes as I can under Google Chrome? -OMG I told dinnt - SORRY!

  Glad you stuck with this issue cuz I pulled a real boner trying to fix. I was totally distraught on the main menu of * two * UNDO and REDO. If you remember that I tried to install the menu shortcut for UNDO them and REDO and totally rejected the idea that they might be under Edit on the crazy Main Menu which of course, they have been and worked like a charm. THANKS again man, you are a true hero!

• optimize the size of the temp and redo files

  Hi gurus,
  
  y at - he of the formulas for finding the optimal size of temporary storage and redo logs groups.
  
  If redo log groups are often fill what steps to do.
  
  I know the formula for the optimal size of undo tablespace: rate of transactions * the undo tablespace retention policy * block size
  
  Please let me know the solution of problems.
  
  Thank you!

  In general, I try to shoot for redo log files exchange once every 20 minutes. However, in many systems, there can be a wide range of time swap, depending on the workload.

  In regards to the temp, it's pretty easy. Define up to about 32 MB w/autoextend on and let it grow to be larger because it must be. Once that happens, it will be virtually stable at this size - until something new comes along and he needs to grow even more.

• Hi me Mamadou Moustapha I bought apple that i phone 6s a few days find out who the best phone of the world, because the day I bought it, I had questions on screen and when I went to the service center, they said they're going to update they have updated o

  Hi me yedess apple that i 6 s phone few days back knowing have the best phone in the world since the day I bought that I have questions on screen and when I went to the service centre they said they're going to update, I bought they updated after that I have the same problem now they say they're going to fix very terrible situation for apple this new product which has manufacturing defect they will repair, I asked to change device they deny because they want to fix m single i face the problem of the first day of the customer are powerless and that they only make just crazy.

  It's what warranties are for. If you bought the phone from Apple or an Apple authorized reseller, iPhone, you have 14 days to return it for a refund. After that the Bank should replace the phone. If you did not buy from Apple or a shop authorized, you must respect the terms of this store. However, Apple will always replace the phone, if you contact them directly.

• About a month ago I posted a question about iMovie and not being able to "share". I solved the problem thanks, so no more emails!

  About a month ago I posted a question about iMovie and not being able to "share". I solved the problem thanks, so no more emails!

  Hi Michael,

  If you want to stop receiving notifications by electronic mail, in the thread, that you have created, then I suggest that you follow the steps below:

  One time connected to the Apple Support communities, visit your mini profile and select manage subscriptions.

  

  Content

  To manage this content, you are currently subscribed and changing your preferences, select the content.

  Select next to see what content you are currently following.  Note that any thread you are responding you subscribe you automatically to this thread.

  You can select to terminate a subscription to a thread.

  

  Learn how to manage your subscriptions

  Take care.

• Question of Safari and Chrome. indicates on the navigation screen. "An element of the Protection of the family filter does not work as expected. Restart your computer. If the problem persists, contact support.  Error: failed to hose CPI. »

  Question of Safari and Chrome. indicates on the navigation screen. "An element of the Protection of the family filter does not work as expected. Restart your computer. If the problem persists, contact support.  Error: failed to hose CPI. »

  Quit Safari, Chrome to quit smoking. If necessary Forcequit.

  Start Safari while holding the SHIFT key, select the menu Safari ClearHistory, then after this check that the homepage is the one you want.

  Do the same for Chrome.

  Close all browsers, restart the mac.

• I just forgot the answers of my questions of security and rescue email

  I just forgot the answers to my questions of security and the emergency email, can someone help me please?

  You have to ask Apple to reset your security questions. To do this, click here and choose a method; If this page does not list one for your country or if you are unable to call, complete and submit this form.

  (138736)

• Trying to follow a question re ITunes and shuffle.  Links on the email no longer work.  How can I do this?

  Why Apple Support community-is such a maze.  Surprisingly, after much effort, I have a question was asked and answered to (helpful but not completely).  In trying to follow up, I have found no direct link in my email, no way to find my name in the communities of support and no way to push my question to the next level.

  I know now how to disable "shuffle" in my ITunes on my IPhone.  Is not very intuitive, as some helpful person has said.  Also, the highlight on the button 'shuffle' is unnecessarily pale.  So now, because since then, shuffle returned requiring manual turn off again, is there some default to shuffle?  I've experimented with compensation the ITunes program and with the phone turned off/on.  Neither returned me shuffle.

  By clicking on your name will take you to your bio page:

  qrodgers

  Click on content and you will see what threads that you have created or participated.

  Can't help with your problem else I don't have an iPhone; someone else will be hopefully chime.

• Question about CR and LF

  Hey guys,.

  Quick question on LF and CR. As you can see I'm LF and CR of writing to a text file and because directly.

  

  However, I don't get the CR at the time where I read it. Why is this? Is it because Windows ignores the CR?

  Thank you

  Hi dora,

  read the Help for the WriteText function.

  There is an option for handling of CR/LF characters and explained mentioned in the "Advanced" section of the article for help!

• I have a question comparing Dreamweaver and Muse.  Can I create a website with Muse, then learn Dreamweaver, and edit the site Web of Muse?  Or would I need to start over with a new Web site based on Dreamweaver?

  I have a question comparing Dreamweaver and Muse.  Can I create a website with Muse, then learn Dreamweaver, and edit the site Web of Muse?  Or would I need to start over with a new Web site based on Dreamweaver?

  I went the same route. I started to want to learn web design and the Muse is an excellent tool. The code it generates, however, not to use it in Dreamweaver. This could be done, I think this isn't worth it, even for a real Geek. Once you get to Muse you will find there are things missing, stuff, you want to do, but are just tough in Muse or you can buy a widget. It is possible in DW and you get which through subscription, so it makes sense. Me what I know now, I'll go directly to DW to learn, except if you want results right now. If you don't want something to cause I stay with Muse and maybe learn to animate CC to add some pizazz to the site. If you only want a simple layout and a couple supporting stick with Muse pages if you want a larger site use DW. Good luck and check out this page to Muse on Google Plus Adobe Muse for beginners - community - Google +...

• Big client - vCenter 5.5 response time of the customer Web U1c / questions of Performance and Navigation

  So we're all aware of the issues with vCenter 5.5U1 WebClient and how we are forced to use it to make use of all the features of the v10, vDS 5.5 vHardware (config switch changes the synchronization problems if an emergency change is done on c# client vDS) VSAN only available via the web client, flash, sluggish to questions do not respond the questions and the list goes with the presentation of the menus and hard to navigate, issues SSO (always after 5.5 upgrades)

  So @ VMware vCenter Architecture Team is going to make an effort to hear and give due to the much needed performance improvements and improvements to the user interface before adding more features and SSO type services which majority of clients don't use not and not force it's customers continue to loose faith its vCenter product?

  Looking for answers with options to remove vCenter 5.5 U1c installation as well as a promise to answer to these in vCenter 6.0 version!

  Here is your answer. First of all, to use Chrome as your browser, then you need to go with at least 4vCPU * 32 GB of RAM & adjust the segment size of java for SSO, Tomcat, (TC) Management Server, inventory server and profile based storage to "refine" vCenter device with DB Oracle embedded or external memory. I did, and performance gains went 10 X. This includes the vSAN enabled running clusters. My recommendation that works very well based on design documents:

  vCenter Server inventory	VMware VirtualCenter Management Webservices (tc Server)	The inventory service	(Sps) profile-based storage service
  Large (more than 400 guests or 4000 VMS) stock	4 GB	12 GB	4 GB

  Setting on the vCenter server 5.5 of the memory unit

  • Connect the unit to vCenter server using SSH
  • VI /usr/lib/vmware-vsphere-client/server/wrapper/conf/wrapper.conf configuration file, locate the JVM memory section and change maxmemory to 4096

  Line 66

  # Memory #wrapper.java.initmemory = 512wrapper.java.maxmemory = 4096 JVM

  • /usr/lib/vmware-vpx/inventoryservice/wrapper/conf/wrapper.conf VI configuration file, find the setting. MaxMemory and replace it with 12288

  Line 116

  # Size (in MB) maximum Java heap wrapper.java.maxmemory = 12288

  • VI /usr/lib/vmware-vpx/sps/wrapper/conf/wrapper.conf find the setting. MaxMemory and change from 1024 to 4096

  On line 154

  # Size (in MB) maximum Java heap wrapper.java.maxmemory = 4096

  • Restart the vCenter device w / DB (1000 hosts) external /embedded for lab (100 guests)

  http://KB.VMware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=2005086&sliceId=1&docTypeID=DT_KB_1_1&dialogID=294472825&StateID=1%200%20294492358

  Documentation Centre of vSphere 5.5

  PS: vCenter 6.0 has much better performance based on my beta test... so don't lose hope yet. Many improvements to come...

  PS: I've also broken down on this here until I figured this out just recently: Re: big client - vCenter 5.5 response time of the customer Web U1c / questions of Performance and Navigation

• How to edit pdf file (in indesign) without having to re-export then and redo all the fields of the form and formatting?

  How to edit pdf file (in indesign) without having to re-export then and redo all the fields of the form and formatting?

  Edit PDF files in InDesign is not a good idea. If the file was originally exported ID, then change the original and then create a new PDF file.

  Open an old, and then use the command replace Pages to insert the new pages on the 'old'. The fields that you have already created will remain in place when you do this.