Oracle 10g 数据库 Package 响应时间慢

Question

Recently, I have made another database for separate yearly package. Once I build and put the indexing which we already used in the previous database. The problem is the when I run the Package it took too much time to gather the information. But when I used the testDB which I used for the developing purpose it works perfectly.

The only difference which I found is the Cost value which is the change in Production Database and testDB.

Answer 1

Run your query on each database with the GATHER_PLAN_STATISTICS hint. Once that is done, run the following:

select * from table(dbms_xplan.display_cursor(null,null,'ALLSTATS LAST'))

This gives you a report on how many rows were processed at each step, and a good indication as to where to focus your tuning efforts. If you head over to https://asktom.oracle.com and search for "GATHER_PLAN_STATISTICS" you'll see lots of examples on how to use it.