10g Flashback questions

I was wondering if someone could answer these questions about "Flashback" in Oracle 10g?
Is "Flashback On" required if we are going to have a standby database?
If "Flashback Off" is set for a database what effect does "Flashback On" have when you create a tablespace?

We changed the way you work with Struts a little in this version - making it simpler through the Visual Struts Page Flow Modeler.
You create actions directly on the editor (drag and drop from the componenet palette).
And you create FormBeans in the structure window.
(there is a simple tutorial as part of the JDeveloper Reviewer Guide).
Have a look at the Struts demos on this page:
http://otn.oracle.com/products/jdev/viewlets/viewlet.html

Similar Messages

Discoverer 10G Plus Questions

Hi
We're in the process of upgrading from Discoverer 4 (APPS EUL) to 10G. We're doing away with the Desktop client. Most users will be given access to Discoverer Viewer and other users will be given access to Plus. We have recently upgraded or DEV instance and there are a few "questions" (i.e. gripes) that users have come back to me with:
1) Do all reports have to be stored on the database to allow them to be accessed by Plus or Viewer? Can only the 10G client version open files from a local hardrive or shared network drive?
2) Can only one report be open at any given time with Plus or Viewer? In client it is possible to have 2 reports open at the same time to facilitate easier comparisons.
3) NULL values are still showing the word "NULL" even though in Tools Options we have set it to show blank, existing reports are still using the NULL value.
I'd very much appreciate feedback on any of the 3 points above.
Thanks.
Paul.

Hi paul,
Its a good idea to upgrade from 4i to 10g 4i is no more used by many and their are some issues or bugs with it.The latest version is 11g which has been released 1 week back.If not go with 10g version available.
1) Do all reports have to be stored on the database to allow them to be accessed by Plus or Viewer? Can only the 10G client version open files from a local hardrive or shared network drive?Yes they have to stored in the database so any ened user can access them from plus or viewer.
Can only one report be open at any given time with Plus or Viewer? In client it is possible to have 2 reports open at the same time to facilitate easier comparisons.Yes,if the reports are registered as different reports and if the end user has access to both the reports thn he can open and compare it OR if both reports are in same workbook as different sheets than its easy to view or compare.
NULL values are still showing the word "NULL" even though in Tools Options we have set it to show blank, existing reports are still using the NULL value.It should show blank,might be some problem.In discoverer 10g i think you will not find this issues.
Hope this helps you.
Best Wishes,
kranthi.

10g memory question on windows 2003 64-bit

oracle 10.2.0.4
windows server 2003 sp2 64-bit
We have a 10g database running on a windows 2003 64-bit with 32GB memory. We set the sga max and target to 10GB and cache to 5GB.
When I look at the task manager, I see there is only 1GB of free memory left. We only have the database running on this server. I would expect a lot more free memory on this server. What would account for the difference? thx
32GB - 10GB (db) - 5GB (cache) - 6.5GB (20% OS) = 10G

Handle:      user13153528
Status Level:      Newbie
Registered:      May 24, 2010
Total Posts:      38
Total Questions:      15 (15 unresolved)
so many questions without ANY answers.
so, what is windows doing with the other memory, how do I see it?OS file system cache

Oracle 10g installation questions

Hi,
I tried to install Oracle 10g (Enterprise Edition) on Windows 2000 server, and encountered the following error when I used the Database Upgrade Assistance to ugrade one of my existing Oracle 8 database TEST.
ORA-01658: Unable to create INITIAL extent for segment in tablespace USERS.
I searched the forum, and seems that there is not enough space for my USERS tablespace. Is it the right solution?
If I clicked Ignore for the above erro, another error appeared:
ORA-00942: table or view does not exist.
I don't have table or view in TEST database, it is just a database instance created by Oracle 8. Do I have to create tables or views in order to upgrade it to Oracle 10g database?
I tried to upgrade an existing Oracle 8 database TEST1 which has data in it, and got the following error:
ORA-01119: error in creating database file D:\oracle\oradata\test1\sysaux01.dbf.
ORA-27044: unable to write the header block of file.
One last question is that after the failing of the DBUCA, I was told that the 10g was successfully installed on my server while no orcl database was created even if I chose
to create a database orcl during my installation.
The following are services running for 10g after the installation.
OracleCSService Started
OracleOraDb10g_home1iSQL*Plus Started
OracleOraDb10g_home1SNMPPeerEncapsulator
OracleOraDb10g_home1SNMPPeerMasterAgent
OracleOraDb10g_home1TNSListenerLISTENER10 Started
Anybody has any idea what went wrong?
Your early reply is greatly appreciated.
Jane

I believe the answers are:
1. the Oracle client needs to be the same bits as the TimesTen server. i.e. if you have 64b TimesTen, then you will need 64b Oracle client. If you have 32b TimesTen then you will need 32b Oracle client.
2. Yes. I believe you can install 64b TimesTen with 64b Oracle client and connect this to a 32b Oracle server. I dont have any idea about performance overhead of this configuration.

Oracle 10g Install Question

Hi All,
I have to install oracle 10g onto a server where there is existing oracle 9i software.
Is it safe to go ahead with the install, while the 9i databases are up?? what are the consequences of doing this?
OS patches and kernel parameters as required for oracle 10g have already been changed.
10g is being installed into a different oracle home and i would choose not to overwrite any of the files as asked by root.sh script.
OS is hp-ux 11i (11.11).
Thanks & Regards
Chandar
Edited by: chandark on Dec 9, 2008 9:50 PM

Hi,
Thanks for your reply.
Sorry for not being clear in my question earlier.
I am planning to install Oracle 10g on a server with existing 9i software. My question is whether we should shutdown all 9i databases for the duration of the install or we can leave them running as long as we do not overwrite any 9i files including files in /usr/local/bin directory that contains oranev etc...
To be on the safer side it is always recomended to shutdown any oracle instances running before we start the install. Wanted to know the consequences if we have them up and running for the duration of the install.
Thanks & Regards
Chandar

Forms 6i to 10g Migration Questions

Hi,
My company is thinking about migrating Forms 6i to 10g. I wonder if you can share some of your experience with us (and with thousands of others who will also face the same daunting task)
1. How do you like/dislike Forms 10g after the migration?
2. What are the pitfalls of Forms 10g? What are the strengths?
3. Other than Oracle Migration tools, is there any other tools that can help us?
4. How long is the migration process typically taken?
5. What problems have been encountered in the upgrade process?
Thank you very much!
Sincerely,
John Sun

May I answer your question with some questions of my own? :)
1. Are you migrating from Forms6i client-server or web?
2. If Web, to a non-Windows middle tier (hopefully)?
3. Do you plan to incorporate OID/SSO and/or Portal in the new environment?
I just reached the end of a 6-month long prototyping project to migrate our Forms/Reports 6i application (80% client-server, 20% web) to 10g, using SSO and Portal for report destination. We migrated about a dozen forms of varying complexity and rewrote our main application/menu form. We originally thought the prototype would take 3-4 months. The purpose was to learn what we needed to develop the best migration approach and have an idea of what it would cost. The application has about 650 forms/reports modules. Costs and the learning curve prohibited a move to J2EE/ADF; oh I wished... Management is hoping we can complete the full migration in about a year, but I think... well, this is a public forum and I am using my real name. ;)
We've only been using 10g release 2 since the end of January. Stay away from release 1 at all costs. Even release 2 is not what I would call entirely stable. I just opened a SR on MetaLink a few days ago for a problem I was able to recreate where the use of a button on a form-level toolbar that directly or indirectly call_forms a new form, and then navigation occurs back to the original form (say, when trying to minimize or rearrange widows) causes the session to crash with the infamous ORA-92101. We rely heavily on a hierarchical tree for our application menu, and keyboard navigation on the tree is somewhat broken (tree triggers not firing).
However, many long-standing 6i bugs have been fixed, and I really, REALLY do appreciate being at PL/SQL version 10 in Forms.
But we have some real challenges too, some self-inflicted. Some 400 of our application forms were converted from SQL*Forms 3.0 via Kumaran a while back. This is admittedly our greatest challenge. The V3 forms, being they were character-based with no mouse support, had lots of code in Key-navigation triggers that was never meant to be in navigation triggers (validation, etc) and would get bypassed if the user skipped the field using a mouse. Kumaran solved this problem using mouse triggers which are no longer supported on the web. We also are attempting to introduce some enhancements during the migration like become Section 508 compliant.
I did not opt to use the migration tool; it doesn't really do that much for you anyway.
One headache for us was Reports. We eliminated many temporary tables (permanent tables created temporarily) in user schemas for the use of global temporary tables. Granted, this feature showed up in Oracle9i. But in 10g, we found inadvertently that database sessions for reports are initiated by a java process and reused for performance, meaning different reports sometimes (and unpredictably) are sharing database sessions instead of getting their own. It would've been nice to know this beforehand because it was a challenge to find out the hard way.
My biggest complaint is that Forms still lags behind in features that are part of the application server. For example, I would've loved to implement Enterprise Users and rid our database of the many thousands of user accounts. But Forms doesn't support it. And Oracle really should have provided a migration tool to create the OID resource that links the OID user account via SSO to the database account. Especially since Forms only works with database accounts. All we got was a 9i-based White Paper on the APIs to write our own. This is Oracle data, not application data for heavens sake!
I've opened easily over a hundred SRs during this time, and am quite sure that my name is mud by now and that I have lost any chance of ever getting hired by Oracle. ;)
If your DBAs are database-centric and not used to administering a middle tier-- or administer an old middle-tier like 9iAS 1.0.2.2.2, get them into instructor-led training on 10g administration BEFORE they have to install the 10g infrastructure and middle tiers. The architecture is radically changed and infinitely more complex. As far as the workload the developers will face; Forms is still pretty much Forms, but the state of your existing code will play into it.
I was so tired of spending years on older versions of Oracle software. And I am proud to announce that I am now intimately familiar with what is known as The Bleeding Edge.

10g listener question

Hi
All,
First question
When I do some minor modification in tnsnames.ora. Do I Need to stop and start listener again.
Second question
And If I want to stop and start listener Do I need to stop all the databases before I can stop and start listener ? (9i and 10g)
Thanks,
Vishal

When I do some minor modification in tnsnames.ora. Do I Need to stop and start listener again.No, tnsnames.ora is totally independant to the listener.
And If I want to stop and start listener Do I need to stop all the databases before I can stop and start listener ? (9i and 10g)No, the listener is used only to connect new client to the server, once the connection is done, listener is not used anymore for that connection.
Note you can reload instead of stop and start the listener.
Micolas.

10g, DBMS_ADVANCED_REWRITE question

Hi,
I'm on an Oracle 10g database. I have been reading about the DBMS_ADVANCED_REWRITE package. It sounds really cool. I do have one question about how it works ...
If I have a query ...
select mycol1
from mytable
where mycol2 = 123
order by mycol1;
Is there any way to use this package with out knowing what '123' would be? ie it is possible it can change?
Is it possible to do something like the following?
select mycol1
from mytable
where mycol2 = VARIABLE
order by mycol1;
Thanks for helping this novice.

The DBMS_ADVANCED_REWRITE package allows you to intercept specific SQL statements and replace them with alternative statements. This is done by defining functional equivalence definitions, which are used by the rewrite engine in addition to regular query rewrites. This can be useful when you need to make minor alterations to the way applications work when you don't have access to the code. This article presents a simple example of how this can be achieved
see this link
http://www.oracle-base.com/articles/10g/dbms_advanced_rewrite.php

Flashback questions - particularly flashback table

Hi,
Oracle 10GR2
The docs state that flashback must be turned on in order to enable the functionality. Subsequently, a flashback logfile is started where designated. Now, for flashback table the docs also state that data comes from the UNDO iin order to restore. My first question is: What is kept in the flashback log and how does it fit in (given that the restore is done via UNDO)? The docs also state that if a flashback database is done that you should perform a resetlogs, but nothing is specified with respect to after a flashback table is done. I could see why you wouldn't want to but still wonder about the table that was flashed back and if it is in a vulnerable state.
I'm also interested in understanding the significance of flashback retention time vs undo_retention.
I guess I see some overlap here between the UNDO and FLASHBACK and want to understand the difference.
Thanks

Know that Flashback logs are not the only thing
stored in Flashback Recovery Area. Archived redo logs
and RMAN backups are also stored and they are used
for Flashback Table, Flashback Drop, Flashback
Versions Query, and Flashback Transaction Query
features.Hmm....this is news to me. Are you are sure about this????? Archived logs, backups are stored in the FRA, but it doesn't mean that they are used for Flashback table, Flashback drop, and FBQ or FTQ....
So yes, I would say, you need flashback on to
flashback a table.Again, NO, this is not required. You may like to review the facts associated with these technologies once again.
Thanks
Chandra

Flashback questions for backup -Restore -Recovery

Hello,
We are planning to implement flashback on our database, and i have configured flashback on my development database, but i have some question before adopt backup/recovery solution using flashback.
(1) If i have configured flashback database, and any non-temp datafile will be lost, will flashback will do automatic restore or recovery or what?
(2) Can we do incomplete recovery or point in time recovery using flashback database?
(3) if i revert to one of restore point, then open resetlogs are mandatory or what ?
Thanks and Regards,
V.SINGH

Hi,
(1) If i have configured flashback database, and any non-temp datafile will be lost, will flashback will do automatic restore or recovery or what?
no. It will not do automatically.
(2) Can we do incomplete recovery or point in time recovery using flashback database?
yes. you can use the restore and recovery method, but you have to disable flashback database during restore and recover time.
(3) if i revert to one of restore point, then open resetlogs are mandatory or what ?
yes, it is required. other wise you can open database in readonly mode.
If you have the metalink access refer below note for more clarity.
Doc ID: 565535.1 Subject: Flashback Database Best Practices & Performance
Thanks,
Siva

10G installation questions

HI
At the time I was installing my Oracle10G in my WinXP, the ip address of my host ( PC) was "192.168.1.105". Now it is changed to "192.168.1.100", my EM is not working ( em_start_out,txt - see below )
Questions:
========
1. How do I handle and address this issue ?
2. Can I force installer to use host name instead of IP sddress ?
3. Can I install just the enterprise Manager along. ?
C:\oracle\product\10.2.0\db_2\oc4j\j2ee>dir
Volume in drive C is HP_PAVILION
Volume Serial Number is 3436-15C3
Directory of C:\oracle\product\10.2.0\db_2\oc4j\j2ee
08/21/2006 06:10 AM <DIR> .
08/21/2006 06:10 AM <DIR> ..
08/10/2006 02:32 PM 264 deploy_db.ini
08/10/2006 02:29 PM <DIR> home
08/10/2006 02:27 PM <DIR> isqlplus
08/10/2006 02:27 PM <DIR> oc4j_applications
08/10/2006 02:27 PM <DIR> OC4J_DBConsole
08/10/2006 02:37 PM <DIR> OC4J_DBConsole_192.168.1.100_orcl
1 File(s) 264 bytes
7 Dir(s) 136,122,929,152 bytes free
C:\oracle\product\10.2.0\db_2\oc4j\j2ee>cd
em_start_out.txt
======================================
C:\oracle\product\10.2.0\db_2\oc4j\j2ee>emctl start dbconsole
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
http://192.168.1.100:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 10g Database Control ...The OracleDBConsoleor
cl service is starting.
The OracleDBConsoleorcl service could not be started.
A system error has occurred.
System error 3 has occurred.
The system cannot find the path specified.
C:\oracle\product\10.2.0\db_2\oc4j\j2ee>

Atual,
Thanks.
I tried. did not help.
I have two questions.
1. At this point, I am unable to start the window service " OracleDBConsoleorcl".
How do I check the logfile to address this issue.
2. How do I see the logfile created by the "emctl startup dbconle" command.
3. What is the config file used by the "emctl startup dbconle" command to derive the following URL http://192.168.1.100:1158
Here is my terminal output
========================
C:\Documents and Settings\HP_Administrator>emctl start dbconsole
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0
Hi Atual,
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
http://192.168.1.100:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 10g Database Control ...The OracleDBConsoleor
cl service is starting.
The OracleDBConsoleorcl service could not be started.
A system error has occurred.
System error 3 has occurred.
The system cannot find the path specified.
C:\Documents and Settings\HP_Administrator>

10G event question

Hello all
I am coding Forms in 10G and i have an architectural question. If i am coding a form event with plsql that is not hitting the database how do i know that it is not making a call to the app server. I am worried about coding events that make too many calls back to the server which limits performance. I have coded in .NET and the ability to have events on everything is great for features but really bad for performance. I don't want to create features that are hindering performance due to round trips.
thanx in advance

Hi,
good, question, that I don't have an answer for. I would assume it to be three round trips because the trigger fire in different times and as far as I remember Forms only bundles triggers that are on a specific item.
Forms does not know whether or not PLSQL code is associated with a trigger and this currently is discussed internally at Oracle as well as here on the forum (some month ago).
The outcome so far is that it is difficult to not ping the server about actions taking place on thw Forms client because it could be a navigation involved. This, if not reported back to the server, leads e.g. to the :system.cursor_item giving the wrong return value. As said, this is something we are discussing but haven't come to a conclusion.
For you this means that no matter if there is a PLSQL code associated with a trigger, a network round trip is made. However, keep in mind that we are not issuing a round trip for all triggers on an item but bundle all triggers that fire to the same time (e.g. all POST triggers on an item will cause one roundtrip)
Frank

Oracle 10g Flashback

Hi experts,
We have tried to flashback the data from oracle 10g database. for this we have executed AS OF TIMESTAMP query, the Undo has been set 900 and db_flashback_retention_target also 1440 but we can get 4 days old data with help of 'AS OF TIMESTAMP" query, Can you please clarify is there any internal table is for maintaing the old data since undo retention value also very small archive log file also deleted every 4 hours once , then how its possible to get the 4 days old data, where the old data actually stored? Please help on this.

Your old data is stored in UNDO segments. In order to flash back as of timestamp (4 days prior), you must set UNDO retention to 4 days or higher (900 Seconds is default). You must also ensure your UNDO tablespace is sized large enough to hold all data to satisfy retention.
You will not be able to perform flashback on the table if there were any DDL's executed on the table and structure of table is changed since 4 days..
Thanks

10g Flashback problem

The flashback facility avaiable in 10g slows the system to such an extent that the application response time is increased beyond expectation. When the Flashback is turned off, the system runs perfectly well. Need to know the overhead of running Flashback and also if there is any corelation between application data intense query and Flashback. The application is developed on a J2EE STRUTS platform and runs on WebSphere6.0.2.7/Oracle 10g Rel 2. The person who setup the Flashback insists that the problem is with application queries but the how do you explain the perfect behavious when the Flashback is OFF.
Please help as things are in a mess.

Nothing you have posted indicates that the writing of flashback logs is the issue nor have I seen it to be an issue.
Where are the metrics?
Got a stats pack report somewhere?
What patch level of 10.2?
What size DB in terms of transactions per unit of time?
What is the size of the flashback area?
How much flashback is being written?
The things that do not matter are your app server or the Java framework. Post things relevant to the database not the middle tier.

10G UTL_MAIL question

I've followed this:
http://www.oracle-base.com/articles/10g/PlsqlEnhancements10g.php#UTL_MAIL
Question is:
Is it possible that I can use 'to_recipient_variable' instead of hard coded values ([email protected], [email protected], etc.) in Recipient because I want to use this feature in my search form that I've created using 10G-forms builder.
fyi:
I've 'email_field' in the 10G DB which I will search through 10G-based form and after getting the result I want to send emails to everybody who got the hit.
Thanks.
Gaurav

This is a database question better suited for the database forum. But having said that...
You can create a stored prcedure in the database, and pass the values to it that you want the procedure to use. You don't need to hardcode the values.

10g Flashback questions

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