Note that this command puts the database in Quiesce Mode.Please consult the Note 375946.1
Applies to: Enterprise Manager Grid Control - Version: 10.2.0.1 to 11.1.0.7
This problem can occur on any platform.
SymptomsWhen running 'emca -config dbcontrol db -repos recreate' or 'emca -deconfig dbcontrol db -repos drop' to recreate or drop the Enterprise Manager Database Control configuration files and repository the operation hangs and at the same time users are not able to login to the database. CauseThe emca command, when recreating or dropping the repository, requires the database to be quiesced. This means that, temporarily, no operations are possible on the database and new users cannot login.
If there are active sessions on the database at the time the quiesce operation will hang pending their completion, during which time no new users will be able to connect.
Therefore it is important to understand that running these commands may/will cause the database to be unavailable during the time that the repository is being dropped and should not be run on a production database unless you are fully aware of the possible impact to database availability and have planned for this eventuality
SolutionTo implement the solution, please execute the following steps:
1. Kill the emca command
2. Connect to the database with SYS account through SQL*Plus
SQL > alter system unquiesce;
Run the emca command at a time when there is low system usage.
For additional information on emca, please consult:
Enterprise Manager Advanced Configuration
Topic 1.2.6 Configuring Database Control During and After the Oracle Database 10g Installation
Available on OTN at:
http://download.oracle.com/docs/cd/B16240_01/doc/nav/portal_booklist.htm
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