The query is performing very very slow, can any one please help me tue this

Question

SELECT h.ROWID row_id, e.preparer_user_id
FROM arsarc.ars_sv_reconciliation e,
arsarc.ars_sv_reconciliation_accts a,
arsarc.ars_sv_acct_status_history h
WHERE e.rec_id = :b1
AND e.rec_id = a.rec_id
AND e.ledger_id = h.ledger_id
AND a.ccid = h.ccid
AND e.preparer_user_id <> h.preparer_user_id
AND h.fiscal_year + h.fiscal_period >= e.fiscal_year + e.fiscal_period
PLAN_TABLE_OUTPUT
Plan hash value: 2851427911
| Id  | Operation                     | Name                           | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT              |                                |    60 |  7740 |  6282  (11)| 00:00:08 |
|*  1 |  HASH JOIN                    |                                |    60 |  7740 |  6282  (11)| 00:00:08 |
|*  2 |   INDEX RANGE SCAN            | PK_RECONCILIATION_ACCTS        |   104 |  4160 |     3   (0)| 00:00:01 |
|   3 |   NESTED LOOPS                |                                |   178K|    15M|  6243  (10)| 00:00:08 |
|   4 |    TABLE ACCESS BY INDEX ROWID| ARS_SV_RECONCILIATION          |     1 |    23 |     2   (0)| 00:00:01 |
|*  5 |     INDEX UNIQUE SCAN         | PK_ARS_SV_RECONCILIATION       |     1 |       |     1   (0)| 00:00:01 |
PLAN_TABLE_OUTPUT
|*  6 |    TABLE ACCESS BY INDEX ROWID| ARS_SV_ACCT_STATUS_HISTORY     |   178K|    11M|  6241  (10)| 00:00:08 |
|*  7 |     INDEX RANGE SCAN          | ARS_SV_ACCT_STATUS_HISTORY$LPY | 62094 |       |  5243  (11)| 00:00:07 |
Predicate Information (identified by operation id):
   1 - access("A"."CCID"="H"."CCID")
   2 - access("A"."REC_ID"=TO_NUMBER(:B1))
   5 - access("E"."REC_ID"=TO_NUMBER(:B1))
   6 - filter("E"."PREPARER_USER_ID"<>"H"."PREPARER_USER_ID")
PLAN_TABLE_OUTPUT
   7 - access("E"."LEDGER_ID"="H"."LEDGER_ID")
       filter("H"."FISCAL_YEAR"+"H"."FISCAL_PERIOD">="E"."FISCAL_YEAR"+"E"."FISCAL_PERIOD")

Answer 1

Hi,
the plan isn't showing any problem (the cost isn't high) so it's not possible to use it to troublehshoot the query. Please provide more information: 4-digit Oracle version, and depending on the version, either SQL real-time monitor report or dbms_xplan output with rowsource stats (option "iostats last" after running your sql with ALTER SESSION SET STATISTICS_LEVEL = ALL).
Also, when reporting a performance problem it would be wise to avoid expressions like "very, very slow" replacing them with something more useful like "my query is taking 2.5 hours to retrieve 30k rows".
Best regards,
Nikolay