Table statistics being locked after exporting in 10g

Some unexpected activity was recently encountered while we were exporting data from a 10g version of a database into another database that was version 11g. We were moving data structures without moving the data. After doing so we were unable to analyze the tables in the target system. It turns out this is a common problem.

Table statistics get locked when exporting only the table structures with DataPump. This situation is identified as an issue that occurs with Oracle 10.2. Using DataPump data is not exported or imported if the option CONTENT = METADATA_ONLY is set.

To resolve this there are two options listed on My Oracle Support.
1. After the import unlock the statistics for tables using the command:
execute DBMS_STATS.UNLOCK_TABLE_STATS('owner','table_name');
NOTE the statistics can also be unlocked at the schema level.

2. Do not import table statistics using the option EXCLUDE=TABLE_STATISTICS.

REFERENCES

415081.1, DataPump Import Without Data Locks Table Statistics

Extra lines in controlfile to trace

The database command 'alter database backup controlfile to trace;' is a commonly used command for DBAs to make a backup of the database controlfile. This tracefile can be used in cloning or other activities to create a new controlfile as part of a fully automated process. Some users, however, have seen an issue with 'alter database backup controlfile to trace;' in an 11g (11.1.0.7 specifically) instance which can cause issues with any such automation.

ISSUE
'alter database backup controlfile to trace;' puts additional header lines in seemingly random locations in the trace file. An example of the line: *** 2010-03-06 14:24:42.720

SOLUTION
The reason for this issue is unknown. However, there is a pretty simple workaround. Rather than issuing only 'alter database backup controlfile to trace;', issue 'alter database backup controlfile to trace as ;' instead. This removes the header information and the issue has not been seen using the more exact syntax.

TIP
If you have any fully automated processes, such as cloning, make sure you fully test them out multiple times before rolling any changes, especially major ones such as database upgrades, to your production instance.

Subscribe to HRMS Notfications

APPS DBAs who support Oracle systems that run payroll are aware of numerous patching requirements for those instances. There are quarterly patches as well as several phases of year end patches which need to be applied in a timely manner.

Oracle provides an email list to notify customers when these patches are released. The email list is the best way to quickly receive information about these patches. An email will be sent from Oracle North American Payroll with a subject line similar to "ATTN: US & Canadian HRMS Customers: End of Year Phase 2 2009, US Q4 2009 and Year Begin 2010 Statutory Updates Released!" The body of the email will contain patch number information for different versions of the software. There will also be other sections in the email with important information for payroll customers.

To subscribe to the email distribution list described in this blog, send e-mail with the following:

To: cshrdev_uk@oracle.com
Subject: Oracle North American Payroll World Contact Update
Body: your contact name, CSI number, and company name

To ensure that information is received and acted on in a timely manner have multiple people subscribe to this distribution list. Functional users, lead developers, DBAs and managers should have subscriptions so that the information is available for the entire organization even if a key person is out of the office when the email is sent.

Don't forget to apply this patch when upgrading to 12.1.1 !

In a recent test upgrade from 11.5.10.2 (ATG RUP6) to R12.1.1, one of the issues we discovered is that users are unable to login after the upgrade due to an "invalid password" message. Resetting the password using FNDCPASS did not help. After logging an SR with Support and much troubleshooting, we discovered that an important pre-requisite patch had been overlooked.


The patch number is 8764069 and it needs to be applied in pre-install mode (see the patch README for detailed instructions). The cause of the issue and the fix that this patch delivers is found in these MOS Documents -


566521.1 - Oracle Application Object Library Release Notes, Release 12.1.1 (see Section 5)
457166.1 - FNDCPASS Utility New Feature: Enhance Security With Non-Reversible Hash Password (see highlighted Note #5 (in yellow) in the "Goal" section)


In essence, if you are on 11.5.10.2 ATG RUP6 or higher, and have migrated to using non-reversible hash passwords using the FNDCPASS USERMIGRATE functionality delivered in ATG RUP6, and are now migrating to R12.1.x, this patch needs to be applied before the upgrade.


Not doing so will, unfortunately, make the upgraded instance unusable - and there is no fix, other than to re-do the upgrade from scratch. MOS Docs 942600.1 (Post Rapid Wiz Install Check Fails On Login Page With RW-50016 After Upgrading From 11i or 12.0.x to 12.1.x) and 566521.1 indicate that this patch can be applied after the upgrade, but this did not remedy the situation in our case. We basically had to start with the upgrade process all over again.


This important pre-requisite is not currently documented in any of the R12.1.x upgrade guides.


REFERENCES


566521.1 - Oracle Application Object Library Release Notes, Release 12.1.1
457166.1 - FNDCPASS Utility New Feature: Enhance Security With Non-Reversible Hash Password
942600.1 - Post Rapid Wiz Install Check Fails On Login Page With RW-50016 After Upgrading From 11i or 12.0.x to 12.1.x)

EM Widget Review for EM Version 10.2.0.5

A cool feature has been developed by Oracle to run on top of Enterprise Manager. Desktop Widgets are available for download from Oracle.com. There are currently three widgets that can be downloaded. The widgets are developed on Adobe Air which allows them to run as lightweight internet applications.

The three widgets available are:
Target Search and Monitoring
High-Load Databases
Service Level Monitoring

Of these three I have found High-Load Database widget to be the most useful in my environment. This widget has a screen which can be flipped onto two sides. One side provides a bar graph summary of active sessions of the top five databases. The graph provided ties back to the performance screen in EM. The other side of the widget's screen shows recent ADDM findings. Using this widget will help the DBA develop a feel for the expected activity on the systems. When the load seems high or the ADDM findings show something odd, click on the database name to bring up a login screen in EM to direct to the performance tab of the target database.

Note that these widgets should be treated as a supplement to EM. They do not replace the metrics and automatic monitoring that EM provides. These are a secondary tool to assist with monitoring of the systems.

The widgets contain a customize menu option which will control refresh rate, display options, and other items. Download these widgets and try them out.

REFERENCES

OEM Widget Page

Advanced Patch Search Options With Oracle Support

With Oracle's Patch search there are several useful Advanced Search options which extend the flexibility of the support tool. This feature can be used to locate Oracle Application patches that meet a wide variety of criteria. I've used this feature several times to quickly find patches needed to resolve a specific problem.



This search feature is not available on the Patch Search section under the My Oracle Support Patches & Updates tab. The feature is listed in the Patching Quick Links section under the heading Advanced "Classic" Patch Search. In the Patching Quick Links section there are several other links that are useful for an APPS DBA. There are links for recommended patches and latest packs for both releases 11i and 12. Per Oracle's help screen the Classic Advanced Search feature will eventually be moved into the Patch Search section, but is currently unavailable from there.



Under Classic Advanced search the APPS DBA has the ability to search for patches that have specific file versions. This option has been useful to locate a patch which includes a certain version of a file. Sometimes Oracle Support notes will list file versions that resolve a known problem. If you do not have the latest file, the search feature will list the patches that contain that file.



Spend some time using the advanced patch search features and the Patching Quick Links. Developing an understanding of the options available will allow for quicker searches in the future. This can help lead to faster problem resolution.

Bug 8207550 Not Dropping FA_JOURNAL_INTERIM Tables

If you run the Create Journal Entries request set in 11.5.10.2, you may have some unneeded tables hanging around in your system. The code to drop the FA_JOURNAL_INTERIM table has been inadvertently commented out of FAXCJEB.pls, allowing the tables to remain after they are no longer needed.


ISSUE

BUG 8207550 FA_JOURNALS_INTERIM tables are not dropped after Create Journal Entry.


SYMPTOM

FA_JOURNALS_INTERIM tables remain present in the database after Create Journal Entries run.


SOLUTION

There is no patch currently available to resolve this issue. You may choose to allow the tables to remain in your system, or these tables can be safely removed after the completion of the Create Journal Entries run.


TIP

If you aren't currently doing so, you should consider implementing a check for newly created objects in your database. This can help you identify objects that are not properly cleaned up.


REFERENCES

757666.1, FA_JOURNALS_INTERIM Tables are Not Dropped after Successful Create Journal Entry and Journal Import

732925.1, Journal Import Fails After Depreciation Run. Depreciation Journal Is Unbalanced