Looking for tuning help on Oracle SQL block. I have written the query myself and it works fine. I just want it to execute more efficiently and hopefully faster.
1. Query is 4500 lines, but it is composed of about 25 shorter and similar blocks.
2. It currently is executed in the scheduler as a stored procedure
3. Query updates tables on one schema, but all using “Merge” over a linked database where all the source tables exist.
a. It looks to the last 3 days of changed data.
4. There are no materialized view logs available nor can I create anything on the linked database.
5. I am unable to provide direct access to the databases or network
a. I will provide the SQL
b. For each table I can provide the number of rows in the table and any indexes
c. There are about 25 total tables and each is used multiple times
d. I can provide an approximation of how many rows the queries would result in
e. I cannot make any new indexes on the source database
f. I have little access to statistics or other things on the source database
6. Both databases are 12c Enterprise [login to view URL] and are 64bit
7. I suspect most of the optimization is going to come from hints in the queries and other ways of optimizing how best to manage the distributed nature of the query.
28 freelancer đang chào giá trung bình $185 cho công việc này
We woked with application team, mostly from financial sector. having very good exposure to tune of log reports queries. for more please check [login to view URL]
Hello , I have about 7 yrs of experience in Oracle PL/SQL and have worked on performance enhancements. I have worked with fortune 10 companies and delivered high class code . Thanks, Jyoti
I am having more than 9 years of experience in sql server 2005/2008/2012/2014/2016 and oracle(pl/sql). I can provide you better solution by utilizing my knowledge and skills.
My expertise in performance tuning for better sql optimization. Relevant Skills and Experience Need to Chek where exactly performance is dropping. That may be because of db(Memory latches) or in the sql itself.