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C.3.170 WCR: replay lock order → A session will wait on this event during replay if it saw some lock contention during capture. Wait … wait for scn's hi 4 bytes High 4 bytes of the 8-byte replay SCN that the session is waiting on wait … for scn's lo 4 bytes Low 4 bytes of the 8-byte replay SCN that the session is waiting on
C.3.169 WCR: replay clock → A session will wait on this event during replay if it has some logical dependencies on another … replay SCN that the session is waiting on wait for scn's lo 4 bytes Low 4 bytes of the 8-byte replay SCN that the session is waiting on
C.3.168 WCR: replay client notify → During replay, the Workload Replay Client always keeps an open connection to the database to detect … some special errors. This session will normally be in the wait state until some specific replay … () to be issued. 2 - waiting for the replay to run to completion or REPLAY.CANCEL() to be issued.
C.3.171 WCR: replay paused → waiting on this wait event until replay is resumed. Parameters: None
replay context → In Application Continuity, opaque information that the database returns to the client driver during normal application run time.
4.1 Failover and Query Replay → This topic describes the following topics: Transparent Application Failover (TAF) Application Continuity
Disabling Replay → Some application request s are unsuitable for replay. If any application modules are using such … designs, then the disable replay API allows disabling of replay on a per request basis. Disabling … replay can be added to the callback or to mainline code. Disabling replay requires a callback or change
Application Continuity: Automated Replay for Masking Outages → -recoverable error that would not be available for replay. When Application Continuity is configured, an … end-user request is executed at-most once; replay is started if the time has not exceeded the replay … user as a slightly delayed execution. When replay succeeds, this feature masks applications from … applications
126.96.36.199 Replay Divergence → This section contains the divergence analysis of the second run relative to the first. If the analysis shows significant divergence, review the full divergence report.
9.3 Workload Replay → workload replay phase, Oracle Database performs the actions recorded during the workload capture phase … , concurrency, and transaction dependencies of the production system. Database Replay uses a client program … called the replay client to re-create all external client requests recorded during workload capture … . Depending
Part II Database Replay → Database Replay enables you to replay a full production workload on a test system to assess the … overall impact of system changes. Part II covers Database Replay and contains the following chapters … : Introduction to Database Replay Capturing a Database Workload Preprocessing a Database Workload … Replaying
1.2 Database Replay → one of the biggest challenges when validating system changes. Database Replay enables realistic … . Using Database Replay, you can capture a workload on the production system and replay it on a test … potential problems, such as new errors encountered and performance divergence. Database Replay … scripts, resulting
Application Continuity Architecture → The Application Continuity architecture includes the JDBC replay driver and the continuity director … . The components work together to execute capture and replay as follows: JDBC replay driver The JDBC … replay driver intercepts execution errors and, when these errors are recoverable, automatically … replays
11.1.2 Creating a Replay from a Replay Task → To create the replay: From the Database Replay page, click the Replay Tasks tab. Click the link for … the desired replay task in the table. The Replay Task page for the capture appears. Description of … section. The Create Replay pop-up appears. Provide a required Name and optional description,
How Application Continuity Works → are as follows: The client application submits a request that the JDBC replay driver receives. The … replay driver sends the calls that form the request to the database, receiving directions for each call … from the database. The replay driver receives a Fast Application Notification (FAN) or recoverable … error. The replay
188.8.131.52.1 Adding Workload Captures → The first type of operation performed by a replay schedule is to add the participating workload … captures to a replay. When a workload capture is added to a replay schedule, a unique number is … returned to identify the workload capture. A workload capture can be added to a replay schedule more than … once, as
15 Using Consolidated Database Replay → Database Replay enables you to capture a workload on the production system and replay it on a test … Replay may not accurately predict how much additional workload can be handled by the new system. For … in much lower resource usage (such as host CPU and I/O) during replay because the new system is … . Consolidated
12.6.9 Resuming a Workload Replay → This section describes how to resume a workload replay that is paused. To resume a workload replay
13.2.3 Reviewing Workload Replay Reports → compared to what was captured. There are numerous factors that can cause replay divergence, which can … be analyzed using the workload replay report. The information contained in the workload replay … report consists of performance and replay divergence. Performance divergence may result when new … algorithms
184.108.40.206 Starting Replay Clients → After determining the number of replay clients that are needed to replay the workload, you need to … start the replay clients by running the wrc executable in replay mode on the hosts where they are … installed. Once started, each replay client will initiate one or more sessions with the database to