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   Oracle Tips by Burleson

Oracle10g End-to-End Tracing

End-to-End Tracing is a new feature in Oracle Database 10g that facilitates the following tasks:

  • Helps the debugging of performance problems in multi-tier environments. In multi-tier environments, a request from an end client is routed to different database sessions by the middle tier.
  • Proper accounting of workload for applications using services. Service Name, Module, and Action name provide a means to set apart important transactions in an application.

End-to-End tracing becomes possible with the attribute client_identifier in v$session, which uniquely identifies a given end client and is carried through all tiers to the database server. Enabling tracing based on the client_identifier solves the problem of debugging performance problems in multi-tier environments.

You can use the newly introduced dbms_monitor package to control additional tracing and statistics gathering. This package contains the following procedures used to enable and disable additional statistics aggregation:

  • client_id_stat_enable: Used to enable statistics accumulation for a given client identifier
  • client_id_stat_disable: Used to disable statistics accumulation for a given client identifier
  • serv_mod_act_stat_enable: Used to enable statistics accumulation for a given hierarchy of service name, module name, and action name
  • serv_mod_act_stat_disable: Used to disable statistics accumulation for a given hierarchy of service name, module name, and action name

Here is an example to enable and disable the tracing based on a client_id:

EXECUTE DBMS_MONITOR.CLIENT_ID_TRACE_ENABLE ('client id');

EXECUTE DBMS_MONITOR.CLIENT_ID_TRACE_DISABLE ('client id');


Get the complete Oracle10g story:

The above text is an excerpt from "Oracle Database 10g New Features: Oracle10g Reference for Advanced Tuning and Administration", by Rampant TechPress.  Written by top Oracle experts, this book has a complete online code deport with ready to use scripts. 

To get the code instantly, click here:

http://www.rampant-books.com/book_2003_2_oracle10g.htm


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