How to plan for size of Flashback Recovery Area? Best Practices?

Hello all,
I've set up a 5 node RAC cluster, setting up ASM diskgroups for data, and one for FRA. (11Gr2 on RHEL5)
I'm wondering if there are any rules of thumb or guides to know how large to make your FRA? This FRA disk group will serve as the FRA storage area for about 4-5 instances.
What is a good way to figure how much storage I'll need to allocate to each instance...for say a 5 day retention window for each instance via RMAN?
Thanks in advance for any advice and/or links,
cayenne

Philippe Florent wrote:
Difficult to answer. You want to have a "real" FRA with the archivelog files, the rman backups right ?
Do you want your backupsets to be compressed, do you want to backup as copy ? Do you want to use the flashback feature ? Do you know the total size of the archivelog files your instances will daily generate ?
Best regards
PhilThanks for the replies.
Yes, I want to use the flashback feature. I wasn't planning to used compressed backupsets....I run hourly RMAN jobs to backup and remove archive logs....daily incremental rman jobs to do level=1 backups...and weekly rman jobs for level=0 incremental.
Yes, I want to have a real FRA with archivelogs and use the rman backups.
Not sure the total size of the archivelog files it will generate. Is there a way to check to see on an existing instance elsewhere what it uses for an example? Not sure how to tell how much is being generated...
Right now, I've set aside about 230GB...as that these were all same sized disks on the ASM....so, starting with that, but I still have larger disks to add to this diskgroup if need be.
Thank you in advance.
cayenne

Similar Messages

Flashback Recovery area Full in Oracle 10g

Before the flashback recovery area is full our
Archive destination is USE_DB_RECOVERY_FILE_DEST
Our DB_RECOVERY_FILE_DEST =/S01/app/oracle/flash_recovery_area/
We got the Error:- ORA-00257
Inorder to resolve the error we changed the log_archive_dest_1='/S01/app/oracle/db/archive'
now the archive destination is changed to /S01/app/oracle/db/archive
Archive logs getting generated in the above directory from now onwards.
In the mean time i moved all the files from /S01/app/oracle/flash_recovery_area/
to diff directory.
But the below query gives still the space used is 3935.27 MB, where physically there are no files in /S01/app/oracle/flash_recovery_area/
When will these values in the query update. Is there anything i have to do to reclaim the space 3935.27 MB (in the query below). Now after reclaiming the space, i want to use the Flash Back Recovery area (/S01/app/oracle/flash_recovery_area/) for the archive logs, like a switchback to where we are initially. How to reclaim the space ? How to switch back archive logs to Flash Back Recovery Area (/S01/app/oracle/flash_recovery_area/).
Please the below report for the above conversation.
Sat May 20 page 1
Flash Recovery Area Status
Space Space Reclm
Limit Used Space
File Name (MB) (MB) (MB) Files
/S01/app/oracle/flash_recovery_a 4000.00 3935.27 3935.27 90
rea
Experts share your experience. Appreciate your reply in this regard..........
Thanks

In UNIX style environments you often don't see reclaimed space until the database is restarted. Backup the database and archivelogs and the flashback area shoudl take care of itself in future. If not, you can always delete obsolete archivelogs manually by using the DELETE command in RMAN.
To cleanup now, first you must tell RMAN that the files you've moved are no longer available:
crosscheck archivelog all;
You can then delete the obsolete archivelogs using the following RMAN command:
delete obsolete;
I'm assuming you use RMAN for all your backups :)
Cheers
Tim...

Flashback Recovery Area Issue!!!

Oracle Version -10.2.0.3 Running on Windows 2003 Server
Flashback recovery area is defined as -C:\oracle\product\10.2.0\flash_recovery_area
(Currently FRA is only used for storing archivelogs)
RMAN Backups are going on -C:\Backups\
I am running Nightly full RMAN Backup (Backup database archivelog delete input),which takes backup of database and archive logs and writes to C:\Backups\ and deletes all archivelogs from FRA.So every morning if I go and check FRA physically there is no file.
If I check v$recovery_file_dest and v$flash_recovery_area_usage they say that I have 50 files and FRA is 50% used where in I can see any file physically in FRA.
Thanks in advance for reading this..let me know if you have any explanation for this.
Thanks,
Anuj

RMAN> show all;
using target database control file instead of recovery catalog
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'C:\ORACLE\PRODUCT\10.2.0\DB_1\DATABASE\Saaaa11.ORA'; # default

Recovery catalog best practice

Hi there,
I want to ask you about your recovery catalog best practices
should it be separate server, how to backup it, should I have standby recovery catalog, etc. ?
we have dc and rdc and about 20 databases, we do backups to tapes and we use recovery catalog (in dc 11.2.0.3) on separate lpar on aix 7.1
I mostly wonder how to protect it
regards!

for recovery catalog you also do rman backup and put it in tape or Disk (if it is small database) so that at the time of server failure you can get all information and make a schedule to try to recover recovery database backup on diffrent server to check its creadibility.

What are best practices for managing my iphone from both work and home computers?

What are best practices for managing my iphone from both work and home computers?

Sync iPod/iPad/iPhone with two computers
Although it isn't possible to sync an Apple device with two different libraries it is possible to sync with the same logical library from multiple computers. Each library has an internal ID and when iTunes connects to your iPod/iPad/iPhone it compares the local ID with the one the device normally syncs with. If they are the same you can go ahead and sync...
I have my library cloned to a small 1Tb USB drive which I can take between home & work. At either location I use SyncToy 2.1 to update the local copy with the external drive. Mac users should be able to find similar tools. I can open either of the local libraries or the one on the external drive and update the media content of my iPhone. The slight exception is Photos which normally connects to a specific folder on a specific machine, although that can easily be remapped to the current library if you create a "Photos" folder inside the iTunes Media folder so that syncing the iTunes folders keeps this up to date as well. I periodically sweep my library for new files & orphans withiTunes Folder Watch just in case I make changes at one location but then overwrite the library with a newer copy from the other. Again Mac users should be able to find similar tools.
As long as your media is organised within an iTunes Music or Tunes Media folder, in turn held inside the main iTunes folder that has your library files (whether or not you let iTunes keep the media folder organised) each library can access items at the same relative path from the library folder so the library can be at different drives/paths on different machines. This solution ensures I always have adequate backups of my library and I can update my devices whenever I can connect to the same build of iTunes.
When working with an iPhone earlier builds of iTunes would remove any file not physically present in the local library, even if there was an entry for it, making manual management practically redundant on the iPhone. This behaviour has been changed but it will still only permit manual management with a library that has the correct internal ID. If you don't want to sync your library between machines on a regular basis just copy the iTunes Library.itl file from the current "home" machine to any other you want to use, then clean out the library entires and import the local content you have on that box.
tt2

How to plan for allocation of Eloqua Instances with Enterprise license

Does anyone have additional materials about the allocation of the 20 Eloqua instances that come with an Enterprise subscription, including best practices guidelines?
Thank you!

Hi,
So far, I don’t know how to identify with Lync Powsershell or .NET as well.
However, you can identify from Lync Server Control Panel. For Lync Server Multitenant Hosting Pack, it is incompatible with Lync Server Control Panel, this means you should use the Lync Server Control Panel only in read-only mode. For example, enabled
users are not displayed in the User section of the Lync Server Control Panel. So you can identify with the way of enabling users on Lync Server Control Panel, Lync Server Standard/Enterprise Edition will show the users on Lync Server Control Panel.
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support

Deleting the flashback recovery area and the files (Oracle 10g on Solaris 8

Hi,
We have a dev. db which is small about 3 gb in all (crd files). for this I had enabled flashback and also put it in archivelog mode. then the db_recovery_file_dest_size grew to 3 gb. since space is an issue, I turned off the flashback feature. (by the command: ALTER DATABASE FLASHBACK OFF;)
Tomorrow I will also make it into noarchivelog mode. My question is: it is having lots of archived logs (may be 3 gb or more) in the flashback recovey area. What is the correct syntax to delete them? There is a warning in alert log which says that use RMAN delete command but I am not aware of exact syntax.
Thanks
Nirav

You can use variations of delete. (As you say there are many files, incude noprompt)
Once the database goes into noarchivelog mode, the archived redo logs are essentially worthless. They would be useful/necessary if you wanted to restore the database to a point in time prior to going noarchive, but if you don't need that, the two ways you are looking at deleting (depending how you go about it) are at the OS level and within the database (what Oracle knows or remembers about the archived redo logs and where they were sent to via the arch process). The RMAN approach is cleaner, assuming you were using that.
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/maint009.htm#sthref776
Delete unnecessary files from the flash recovery area using the RMAN DELETE command. (Note that if you use host operating system commands to delete files, then the database will not be aware of the resulting free space. You can run the RMAN CROSSCHECK command to have RMAN re-check the contents of the flash recovery area and identify expired files, and then use the DELETE EXPIRED command to remove missing files from the RMAN repository.)

Flashback Recovery area in Oracle 10g

Hi,
our db_recovery_file_dest_size = 4G after this is filled, when i am logging in as a user, archiver error ORA-00257 has occured. I want to avoid this error coming every time, is there any way to automatically delete some of the files when it (db_recovery_file_dest) is full, like deleting very old flashback logs inorder to retain space & avoid that error. Experts share your experience...
Thanks

From http://download-uk.oracle.com/docs/cd/B19306_01/backup.102/b14192/setup005.htm#sthref271
Exactly which of the eligible files will be deleted to satisfy a space request is unpredictable. The rules governing the selection of specific files for deletion are likely to change between releases and are dependent upon your configuration. The safe and reliable way to control deletion of files from the flash recovery area is to change your retention policy. If you wish to increase the likelihood that files moved to tape are also retained on disk to minimize expected restore and recovery times, increase the flash recovery area quota.
Message was edited by:
Pierre Forstmann

How to have dynamic size of the content area

Hello everyone
I am trying to create a printable adobe form using Adobe LiveCycleDesiner 8.
Here is my problem.
The PageMaster is containing the company Logo, Address and the ship to address.
The ship to address can be composed by up to 11 lines. Those lines are not always used. Some addresses have only 5 lines.
If I am reserving those 11 lines before the content area, we are loosing alot of space that can be used for the body page.
So the question is:
Is it possible to have a flowed content area? Where the size of the content area would be driven by the available space of the PageMaster?
Regards
stjacqd

Hello Carsten
The subform has no impact to the content area size.
The subform has an impact only inside the content area or inside another form.
My point is:
PageMaster
| Logo                                          |
| Address1                   Address      |
| Address2                   Address      |
| Address3                   Address      |
| Address4                   Address      |
| Address5                   Address      |
| Address6                   Address      |
| Address7                   Address      |
| Address8                   Address      |
| Address9                   Address      |
| Address10                 Address      |
| Address11                 Address      |
|---------------------------------------------------|
| Content area                               |
|                                                   |
So, inside the Page Master there is 11 lines reserved for the addresses,
But at the printout, if there are only 3 lines used for the address, I would like to reassign the space used by the address4 through adderss11 to the content area.
So the result at printout will look like:
| Logo                                          |
| Address1                   Address      |
| Address2                   Address      |
| Address3                   Address      |
|---------------------------------------------------|
| Content area                               |
|                                                   |
Instead of:
| Logo                                          |
| Address1                   Address     |
| Address2                   Address     |
| Address3                   Address     |
|                                                   |
|                                                   |
|                                                   |
|                                                   |
|                                                   |
|                                                   |
|                                                   |
|                                                   |
|---------------------------------------------------|
| Content area                               |
|                                                   |
Regards

What are Best Practice Recommendations for Java EE 7 Property File Configuration?

Where does application configuration belong in modern Java EE applications? What best practice(s) recommendations do people have?
By application configuration, I mean settings like connectivity settings to services on other boxes, including external ones (e.g. Twitter and our internal Cassandra servers...for things such as hostnames, credentials, retry attempts) as well as those relating business logic (things that one might be tempted to store as constants in classes, e.g. days for something to expire, etc).
Assumptions:
We are deploying to a Java EE 7 server (Wildfly 8.1) using a single EAR file, which contains multiple wars and one ejb-jar.
We will be deploying to a variety of environments: Unit testing, local dev installs, cloud based infrastructure for UAT, Stress testing and Production environments. **Many of our properties will vary with each of these environments.**
We are not opposed to coupling property configuration to a DI framework if that is the best practice people recommend.
All of this is for new development, so we don't have to comply with legacy requirements or restrictions. We're very focused on the current, modern best practices.
Does configuration belong inside or outside of an EAR?
If outside of an EAR, where and how best to reliably access them?
If inside of an EAR we can store it anywhere in the classpath to ease access during execution. But we'd have to re-assemble (and maybe re-build) with each configuration change. And since we'll have multiple environments, we'd need a means to differentiate the files within the EAR. I see two options here:
Utilize expected file names (e.g. cassandra.properties) and then build multiple environment specific EARs (eg. appxyz-PROD.ear).
Build one EAR (eg. appxyz.ear) and put all of our various environment configuration files inside it, appending an environment variable to each config file name (eg cassandra-PROD.properties). And of course adding an environment variable (to the vm or otherwise), so that the code will know which file to pickup.
What are the best practices people can recommend for solving this common challenge?
Thanks.

HI Bob,
As sometimes when you create a model using a local wsdl file then instead of refering to URL mentioned in wsdl file it refers to say, "C:\temp" folder from where you picked up that file. you can check target address of logical port. Due to this when you deploy application on server it try to search it in "c:\temp" path instead of it path specified at soap:address location in wsdl file.
Best way is re-import your Adaptive Web Services model using the URL specified in wsdl file as soap:address location.
like http://<IP>:<PORT>/XISOAPAdapter/MessageServlet?channel<xirequest>
or you can ask you XI developer to give url for webservice and username password of server

What are best practice for packaging and deploying j2EE apps to iAS?

We've been running a set of J2EE applications on a pair of iAS SP1b for about a year and it has been quite stable.
Recently however we have had a number of LDAP issues, particularly when registering and unregistering applications (registering ear files sometimes fails 1st time but may work 2nd time). Also We've noticed very occasionally that old versions of classes sometimes find their way onto our machines.
What is considered to be best practice in terms of packaging and deployment, specifically:
1) Packaging - using the deployTool that comes with iAS6 SP1b to package is a big manual task, especially when you have 200+ jsp files. Are people out there using this or are they scripting it with a build tool such as Ant?
2) Deploying an existing application to multiple iAS's. Are you guys unregistering old application then reregistering new application? Are you shutting down iAS whilst doing the deployment?
3) Deploying ear files can take 5 to 10 mins, is this normal?
4) In a clustered scenario where HTTPSession is shared what are the consequences of doing deployments to data stored in session?
thanks in asvance for your replies
Owen

You may want to consider upgrading your application server environment to a newer service pack. There are numerous enhancements involving the deployment tool and run time layout of your application that make clear where you're application is loading its files from.
If you've at a long running application server environment, with lots of deployments under your belt, you might start to notice slow downs in deployment and kjs start time. Generally this is due to garbage collecting in your iAS registry.
You can do several things to resolve this. The most complete solution is to reinstall the application server. This will guarantee a clean ldap registry. Of course you've got to restablish your configurations and redeploy your applications. When done, backup your application server install space with the application server and directory server off. You can use this backup to return to a known configuation at some future time.
For the second method: <B>BE CAREFUL - BACKUP FIRST</B>
There is a more exhaustive solution that involves examining your deployed components to determine the active GUIDS. You then search the NameTrans section of the registry searching for Applogic Servlet *, and Bean * entries that represent your previously deployed components but are represented in the set of deployed GUIDs. Record these older GUIDs, remove them from ClassImp and ClassDef. Finally remove the older entries from NameTrans.
Best practices for deployment depend on your particular environmental needs. Many people utilize ANT as a build tool. In later versions of the application server, complete ANT scripts are included that address compiling, assembly and deployment. Ant 1.4 includes iAS specific targets and general J2EE targets. There are iAS specific targets that can be utilized with the 1.3 version. Specialized build targets are not required however to deploy to iAS.
Newer versions of the deployment tool allow you to specify that JSPs are not to be registered automatically. This can be significant if deployment times lag. Registered JSP's however benefit more fully from the services that iAS offers.
2) In general it is better to undeploy then redeploy. However, if you know that you're not changing GUIDs, recreating an existing application with new GUIDs, or removing registered components, you may avoid the undeploy phase.
If you shut down the KJS processes during deployment you can eliminate some addition workload on the LDAP server which really gets pounded during deployment. This is because the KJS processes detect changes and do registry loads to repopulate their caches. This can happen many times during a deployment and does not provide any benefit.
3) Deploying can be a lengthy process. There have been improvements in that performance from service pack to service pack but unfortunately you wont see dramatic drops in deployment times.
One thing you can do to reduce deployment times is to understand the type of deployment. If you have not manipulated your deployment descriptors in any way, then there is no need to deploy. Simply drop your newer bits in to the run time space of the application server. In later service packs this means exploding the package (ear,war, or jar) in to the appropriate subdirectory of the APPS directory.
4) If you've changed the classes of objects that have been placed in HTTPSession, you may find that you can no longer utilize those objects. For that reason, it is suggested that objects placed in session be kept as simple as possible in order to minimize this effect. In general however, is not a good idea to change a web application during the life span of a session.

Flashback Recovery Area Usage near 100% - what happens next?

Hello,
I am fairly new to Oracle flashback. I have a database which is nearing 100% usage of the flashback area. Until now, I've just been increasing the size to delay the inevitable. I've also gone and pruned archivelogs (using OS commands) from the fra, but this does not seem to have any effect. What I wanted to know is, what will happen if I let it reach 100%. Will the database cease functioning or will it prune files that it no longer needs and free space on its own?
Thanks for any insight you can provide.

geeter wrote:
Thank you.
With respect to "how" I am using flashback, this is something that also confuses me. It seems as if "Flashback Database" has NOT been enabled, but I know that I can flashback a table within my database by enabling row movement on it. I have specified USE_DB_RECOVERY_FILE_DEST as the location to multiplex archivelogs and I use the EM dbconsole to take full backups of the database which seems to also populate a directory "autobackup" even though the backups are directed somewhere else. My guess is that I do NOT have flashback enabled in the sense you meant. I'd appreciate any clarification.To enabling flashback you have to issue ALTER DATABASE FLASHBACK command at mount stage in 10g(can at open stage in 11g) and you can check it from V$DATABASE.FLASHBACK_ON column.If it is 'YES' then that is enabled else is not.In additionally you performed FLASHBACK TABLE feature this is based on undo tablespaces(undo information and related undo settings/parameter) and nothing relationship with FLASHBACK DATABASE.

How To Increase the size of the TEXT AREA(APEX3.1)

I have a table called tableA in that i have 2 columns
named report_no, Report_body
Report_no containing sequence numbers
and report body contains more than 4000 charecter text
using clob i am able to display 4000 charecter but
I need to display the whole report_body in a text area
is there any option please help me on this

So the problem is you want to create a form against a clob column where you can edit more than 4000 characters in a textarea item for the clob data.
You are not using an Automated Row Fetch process, right?
The first problem may be that you are trying to select more than 4000 bytes as a varchar2 column in a query. This is not allowed in SQL.
Was that query the Source attribute of the page item?
Change the Source Type to Static Assignment (with nothing in the value field) and the Source Used to "Only ...", then create an after-header PL/SQL process as:
begin
SELECT REPORT_BODY into :PXX_REPORT
FROM LOG_REP_DATA a
WHERE a.report_id= :P73_VVR_LOV_POPUP;
end;
...where :PXX_REPORT reflects the name of the textarea item.
Of course :P73_VVR_LOV_POPUP will have to return a session state value when the process fires.
Scott

How do you center dialogs with multiple monitors. code, best practices

My existing code will take the pixel size of the java app, and using the size of the dialog, it will center dialogs perfectly in the center of the application. This is great for single monitors, but when multiple monitors are introduced it is a problem. With dual monitor, the dialog is split in half between the two monitors.
I should be able to determine which pixel/frame initiated the user's action; and then i am hoping to get some code or direction on:
1. how to determine which monitor the user initiated the action on (knowing the px or frame location, how would i do this)
2. how to center dialog on that monitor
if possible, it would be appreciated if you can provide some code; i cant find anything on determing pixel size of monitors and this seems to be a little bit of a project to do from scratch. open source, 3rd party, insight, guidance, all is appreciated. thanks !

This code may help:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class OptionPaneDemo {
    ActionListener al = new ActionListener() {
        public void actionPerformed(ActionEvent evt) {
            Component comp = (Component) evt.getSource();
            JFrame f = (JFrame) SwingUtilities.windowForComponent(comp);
            showDialogInUpperRightCorner(f);
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable(){
            public void run() {
                new OptionPaneDemo().go();
    void go() {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        for(GraphicsDevice gd: ge.getScreenDevices()) {
            JButton showDialogButton = new JButton("show the dialog");
            showDialogButton.addActionListener(al);
            JFrame f = new JFrame(gd.getDefaultConfiguration());
            f.getContentPane().add(showDialogButton, BorderLayout.NORTH);
            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            f.pack();
            centerWindow(f);
            f.setVisible(true);
    void centerWindow(Window w) {
        Rectangle windowBounds = w.getBounds();
        GraphicsConfiguration gc = w.getGraphicsConfiguration();
        Rectangle screenBounds = gc.getBounds();
        int x = screenBounds.x + (screenBounds.width - windowBounds.width)/2;
        int y = screenBounds.y + (screenBounds.height - windowBounds.height)/2;
        w.setLocation(x, y);
    void showDialogInUpperRightCorner(JFrame f) {
        JOptionPane pane = new JOptionPane("Hello, world!");
        JDialog dialog = pane.createDialog(f, "title");
        Rectangle dialogBounds = dialog.getBounds();
        GraphicsConfiguration gc = dialog.getGraphicsConfiguration();
        Rectangle screenBounds = gc.getBounds();
        //int x = screenBounds.x + screenBounds.width - dialogBounds.width;
        //int y = screenBounds.y == 0 ? 1 : screenBounds.y;
        int x = screenBounds.x;
        int y = screenBounds.y + screenBounds.height - dialogBounds.height-1;
        System.out.format("(%d,%d)%n", x, y);
        dialog.setLocation(x, y);
        dialog.setVisible(true);
}

What are best practices for rolling out cluster upgrade?

Hello,
I am looking for your input on the approaches to implement Production RAC upgrade without having a spare instance of RAC servers. We have a 2-node database RAC 11.1 on Production. We are planning to upgrade to 11.2 but only have a single database that the pre-Production integration can be verified on. Our concern is that the integration may behave differently on RAC vs. the signle database instance. How everybody else approaches this problem?

you want to test RAC upgrade on NON RAC database. If you ask me that is a risk but it depends on may things
Application configuration - If your application is configured for RAC, FAN etc. you cannot test it on non RAC systems
Cluster upgrade - If your standalone database is RAC one node you can probably test your cluster upgrade there. If you have non RAC database then you will not be able to test cluster upgrade or CRS
Database upgrade - There are differences when you upgrade RAC vs non RAC database which you will not be able to test
I think the best way for you is to convert your standalone database to RAC one node database and test it. that will take you close to multi node RAC

How to plan for size of Flashback Recovery Area? Best Practices?

Similar Messages

Maybe you are looking for