Actively tracking oracle query performance -


background:

we have database environment views calling views calling views... logic has become complex , changes underlying views can have significant impact on top view being called client application.

now while documenting logic , figuring out how unwind development continues on , performance continues degrade.

currently manually run explain plan on client query , dig tuning it. slow , tedious process , changes may not examined ages.

problem:

i want generate report lists sql id , lists changes in actual time/discrepancy between estimated rows , actual rows/changes in buffers/changes in reads in comparison average computed on last month.

i run following script manually , examine based on day's response.

alter session set statistics_level=all; set linesize 256; set pagesize 0; set serveroutput off;  -- query  select     *     table (dbms_xplan.display_cursor (null, null, 'allstats last'));

what trying see automating explain plan query , inserting statistics table. there can run regression report detect changes in performance can alert developers.

i thinking common enough without having resorting oem. can't find wonder if there more common approach this?

oracle provides functionality automatic workload repositiory. http://docs.oracle.com/cd/e11882_01/server.112/e16638/autostat.htm

it's license on top of enterprise edition though, believe. ought usable in non-production environments without additional cost, check oracle sales rep.


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