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Tricks for Using dbms_profiler to PL/SQL Debugging
September 2, 2004

Oracle Guru Boris Milrud has just published a great paper on using the dbms_profiler package to locate bottlenecks inside PL/SQL:

"The Oracle 8i profiler gathers information at the PL/SQL virtual machine level, which includes the total number of times each line has been executed, the total amount of time that has been spent executing that line, and the minimum and maximum times that have been spent on a particular execution of that line."

The article also show tricks for PL/SQL bottleneck analysis inside SQL*Plus:

"There are situations, however, where you'll want to start a profiling process outside of TOAD in order to control the profiling session more-for instance, by profiling multiple procedures in batch mode, opening multiple SQL*Plus sessions and running profilings in parallel, etc. With TOAD you are limited to one instance of the program running and one procedure profiling at a time. To profile outside of TOAD, you need to do TOAD's work by yourself:

1. Add a wrapper around the procedure call, utilizing the START_PROFILER        and STOP_PROFILER procedures of the DBMS_PROFILER package.

2. Insert additional code to calculate totals, load source code, and do the          cleanup."



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