Queries running and taking time...

Question

Dear All,
My database is 11gR2 RAC on Linux.
Frequently I see the following queries running and consuming database resources.
SELECT DECODE(NVL(:B2 , 0), 2, (DBMS_LOB.GETLENGTH(:B1 )/3)*2, DBMS_LOB.GETLENGTH(:B1 ))FROM DUAL;
I don't know if some log tables needs to truncate.
Kindly help on this.
Regards, Imran

Answer 1

misterimran wrote:
Dear All,
My database is 11gR2 RAC on Linux.
Frequently I see the following queries running and consuming database resources.
SELECT DECODE(NVL(:B2 , 0), 2, (DBMS_LOB.GETLENGTH(:B1 )/3)*2, DBMS_LOB.GETLENGTH(:B1 ))FROM DUAL;Find the code executing this line. If the select is being called from a PL/SQL routine IF logic will probably be slightly more efficient than an unnecessary select from DUAL. The overhead is slight but builds up if done over and over again.
If this is being done in a loop make sure the bind values are chaning inside the loop. If the bind values are the same for every execution there is no reason to do this more than once.