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The following topics describe identifying and resolving common problems in Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle an Oracle Streams environment:. Oracle Streams Replication Administrator's Guide for more information about troubleshooting Oracle Streams replication environments. An alert is a warning about a potential problem or an indication that a critical threshold has been crossed.

There are two types of alerts:. Stateless: Upstream Downstream Word Problems WorkshUpstream Downstream Word Problems Worksheet Oracle eet Oracle Alerts that indicate single events that are not necessarily tied to the system state. For example, an alert that indicates that a capture aborted with a specific error is a stateless alert.

Stateful: Alerts that are associated with upstream downstream word problems worksheet oracle Upstream Downstream Word Problems Worksheet Oracle specific system Upstream Downstream Boat Problems Free state. Stateful alerts are usually based on upstream downstream word problems worksheet oracle numeric value, with thresholds defined at warning Upstream Oracle Word Downstream Worksheet Problems and critical levels.

An Oracle Database 11 g Release 1 or later database generates a stateless Oracle Streams alert under the following conditions:. An Oracle Database 11 g Release 1 or later database generates a stateful Oracle Streams alert under the following condition:. If a capture upstream downstream word problems worksheet oracle is not capturing changes as expected, or if upstream downstream word problems worksheet oracle are Upstream Downstream Word Problems Worksheet Oracle having other problems with a upstream downstream word problems worksheet oracle process, then use the following checklist to identify and resolve capture problems:.

If capture process creation or a data dictionary build is taking an inordinately long time, then upstream downstream word problems worksheet oracle might be because one or more upstream downstream word problems worksheet oracle transactions have not yet committed. An in-flight transaction is one that is active during capture process creation or a data dictionary build.

To determine whether there are in-flight transactions, check the alert log for the following messages:. If you see only the first message in the alert log, then the capture process creation or Upstream Downstream Word Problems Worksheet Oracle data dictionary build is waiting for the inflight transactions and upstream downstream word problems worksheet oracle complete after all of the in-flight Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle transactions have committed.

A capture process captures changes only when it is enabled. For example, to check whether a capture process named capture Upstream Downstream Word Problems Worksheet Oracle is enabled, run the following query:.

If the capture process is disabled, then try restarting it. If the capture process is aborted, Upstream Downstream Word Problems Worksheet Oracle then you might need to correct an error before you can restart it successfully. The following query shows when the capture process aborted and the error that caused it to abort:. If a capture process has not captured recent changes, then the cause might be that the capture process has fallen. If capture process latency is high, then you might be able to improve performance by adjusting the setting of the parallelism capture process parameter.

When a capture process is started or restarted, it might need to scan redo Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle log files that were generated before the log file that contains the upstream downstream word problems worksheet oracle SCN. Removing required redo Upstream Downstream Word Problems Worksheet Oracle log files before they are scanned by a capture process causes the capture process to abort and results in the following error Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle in a capture process trace file:.

If you see this error, then try restoring any missing redo log file and restarting the capture Upstream Downstream Word Problems Worksheet Oracle process. A capture process needs the redo log file that includes the required checkpoint SCN and all subsequent redo log files. RMAN Upstream Downstream Word Problems Worksheet Oracle might delete these files when the disk space used by the recovery-related files is nearing the specified disk quota for the flash recovery area. To prevent this problem in the future, complete one or more of the following actions:.

Increase the disk quota for Upstream Downstream Word Problems Worksheet Oracle Problems Word Worksheet Upstream Oracle Downstream the flash recovery area. Increasing the disk quota makes it less likely that RMAN will delete a required archived redo log file, but it will not always prevent the problem. Configure the source database to store archived redo log files in a location other than Upstream Downstream Word Problems Worksheet Oracle the flash recovery area. A local capture process will be able to use the log files in the other location if the required log files are missing in the flash recovery area.

In this case, a database administrator must manage the log files manually Upstream Downstream Word Problems Worksheet Oracle in the other location. RMAN always ensures that archived redo log files are backed up before it deletes. Oracle Database Backup and Recovery User's Guide for more information about the flash recovery area feature. If a downstream capture process is not capturing changes, then Upstream Downstream Word Problems Worksheet Oracle it might be waiting for redo data to scan.

Redo log files can be registered implicitly or explicitly for a downstream capture process. Redo log files registered implicitly typically are registered in one of the following ways:. For a real-time downstream capture processredo transport Upstream Downstream Word Problems Worksheet Oracle services use the log writer process LGWR to transfer the redo data from the source database to the standby redo log at the downstream database.

Next, the archiver at the downstream database registers the redo log files with the downstream capture process when it archives. For Upstream Downstream Word Problems Worksheet Oracle an archived-log downstream capture processredo transport services transfer the archived redo log files from the source database to the downstream database and register the archived redo log files with the downstream capture process. If redo log files are registered explicitly for a downstream Upstream Downstream Word Problems Worksheet Oracle capture process, then you must manually transfer the redo log files to the downstream database and register them with the downstream capture process.Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle

Regardless of whether the redo log files are registered implicitly or explicitly, the downstream capture process can capture changes made to the source database only if the appropriate redo log files are registered with the downstream capture process.

If this query does not return any rows, then no redo log files are registered with the capture process currently. If you configured redo transport services to transfer redo data from the source database to the downstream database for this capture process, then ensure that the redo transport services are configured Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle correctly. If you did not configure redo transport services to transfer redo data, then ensure that the method you are using for Upstream Downstream Word Problems Worksheet Oracle log file transfer and registration is working properly.

If the downstream capture process is waiting for redo, then it also is possible Upstream Downstream Word Problems Worksheet Oracle that there is a problem with the network connection between the source database and the downstream database.

There also might be a problem with the log file transfer method. Check your network connection and log file transfer method to ensure that they are working properly. If Upstream Downstream Word Problems Worksheet Oracle you configured a real-time downstream capture process, and no redo log files are registered with the capture process, then try switching Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle the log file at the source database.

You might need to switch the log file more than once if there is little upstream downstream word problems worksheet oracle no activity at the source database. Also, if you plan to use a downstream capture process to capture changes to historical data, then consider the following additional issues:.

Both the source database that generates the redo log files and Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle the database that runs a downstream capture process must be Oracle Database 10 g or later databases. The start of a data Upstream Downstream Word Problems Worksheet Oracle dictionary build must be present in the oldest redo log file added, and the capture process must be configured with a first SCN that matches the start of the data dictionary build.

The database objects for which the capture process will capture changes upstream Upstream Downstream Word Problems Worksheet Oracle downstream word problems worksheet oracle be prepared for instantiation at the source database, not at the downstream database. In addition, you cannot specify Upstream Downstream Word Problems Worksheet Oracle a time in the past when you prepare objects for instantiation.

Objects are always prepared for instantiation at the current database SCN, and only changes to a database object that occurred after the object was prepared for instantiation can be captured by a capture Upstream Downstream Word Problems Worksheet Oracle process.

To create a downstream capture processyou must use one of the following procedures:. If you try to create a downstream capture process without using one of these procedures, then Oracle returns the following error:. If authentication is not configured properly between the source database Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle and the downstream capture database, redo data transfer fails with one of the following errors:.

Redo transport sessions are authenticated using either Upstream Downstream Word Problems Worksheet Oracle the Secure Sockets Layer SSL protocol or a remote login password file. The password file must be the same at the source Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle database and the downstream capture database. If the source database has a remote login password file, then copy it to the appropriate Upstream Downstream Word Problems Worksheet Oracle directory on the downstream capture database. Make sure the password is the same on both systems, and set the ignorecase argument to Y.Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle

When downstream capture is configured with a database link, the database link can be used to perform operations at the source database Upstream Downstream Word Problems Worksheet Oracle and obtain information from the source database automatically.

When downstream capture is configured without a database link, these actions must be performed Upstream Downstream Word Problems Worksheet Oracle manually, and the information must be obtained manually.

If you do not complete these actions manually, then errors result when you try to create the downstream capture process. Specifically, the following actions must be performed manually when you configure downstream capture without a database link:. BUILD procedure at the source database to extract the data dictionary at the source database to the redo log before a capture process is created.

You must prepare the source database objects for instantiation. If a synchronous capture is not capturing changes as expected, Upstream Oracle Problems Worksheet Word Downstream then use this section to identify and resolve synchronous capture problems. If a synchronous capture is not capturing changes to tables as you expected, then the rule s in the synchronous capture rule set might not be configured properly. Global rules or schema rules are Upstream Downstream Word Problems Worksheet Oracle being used to try to control upstream downstream word problems worksheet oracle behavior of the synchronous capture.

A synchronous capture ignores global rule s and schema rule s in its rule set. A synchronous capture only captures changes that satisfy table rule s and Upstream Downstream Word Problems Worksheet Oracle subset rule s. A synchronous capture does not behave correctly. If a synchronous capture is not capturing changes to tables as expected, Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle then complete the following steps to identify and correct problems:.

If a propagation is not propagating changes as expected, then use the following Upstream Downstream Word Problems Worksheet Oracle checklist to identify and resolve propagation problems:. If messages are not appearing in the destination queue for a propagation as expected, then the propagation might not be configured to propagate messages from the correct source queue to the correct destination queue.

If the propagation Upstream Downstream Word Problems Worksheet Oracle is not using the correct queues, then create a new propagation. You might need to remove the existing propagation if it is not appropriate for your environment. For a propagation job to propagate messages, the propagation must be enabled. If messages are not being propagated by a propagation as upstream downstream word problems worksheet oracle, then the propagation might not be enabled.

The database link used Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle to propagate messages from the source queue to the destination queue. If the propagation is disabled or aborted, and the Error Date and Error Message fields are populated, then diagnose and correct the problem based on the error message. If the propagation is disabled Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle or aborted, then check the trace file for the propagation job process.

The query in "Displaying the Schedule for a Propagation Job" displays Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle the propagation job process. If the propagation job is enabled, but is not propagating messages, then try stopping and restarting the propagation.

Oracle Database Error Messages for more information about a specific error message. ANYDATA queues are secure queue s, and security must be Upstream Downstream Word Problems Worksheet Oracle Upstream Downstream Word Problems Worksheet Oracle configured properly for users to be able to perform operations on. Secure queue access must upstream downstream word problems worksheet oracle granted to an Oracle Streams Advanced Queuing AQ agent explicitly for both enqueue upstream downstream word problems worksheet oracle dequeue operations.

If an apply Upstream Downstream Word Problems Worksheet Oracle process is not applying changes as expected, then use the following checklist to identify and resolve apply problems:. Oracle Streams Replication Administrator's Guide for more information about troubleshooting apply errors. An apply process applies changes only when it is enabled.

For example, to Upstream Downstream Word Problems Worksheet Oracle check whether an apply process named apply is enabled, run the following query:. If the apply process is disabled, then try restarting Upstream Downstream Word Problems Worksheet Oracle it. If the apply process is aborted, then you might need to correct an error before you can restart it successfully.

If the Upstream Downstream Word Problems Worksheet Oracle apply process did not shut down cleanly, then it might not restart. In this case, it returns the following error:.

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