query taking more time suddenly
Need your help, the below query taking 45mins in production and prod DBA identified this is consuming 13% of CPU.
DB Version: 9.2.0.5
select
OSDB_CUST.BUS_OWNER_ID BUSINESS_OWNER,
OSDB_CUST.EXTERNAL_CUSTNUM CUSTOMER_NUMBER,
OSDB_CUST.CUSTNAME CUSTOMER_LEG_NAME,
BDB_BIL.CTLACCT CONTROL_ACCOUNT_ID,
BDB_BIL.DISCNT_SCHED_CD DISCOUNT_SCH_CODE,
BDB_BIL.CYC_ACCT_FEE_FDOC BASE_FDOC,
BDB_BIL.CYC_ACCT_FEE_LDOC BASE_LDOC,
OSDB_CUSAGR.AGREENUM AGREEMENT_NUMBER,
BDB_BIL.CTL_ACCT_TYP_CD CONTROL_ACCOUNT_TYPE,
BDB_BILPRT.NUM_INV_COPY INVOICE_PRINTED,
BDB_BILPRT.INV_PG_CD INVOICE_PAGE_CODE,