Multiple executions of a query found in the ADDM Report

Question

Hi,
I generated an ADDM Report on my DB for the time when the DB performance was very slow. Below are some lines from it:
RECOMMENDATION 1: SQL Tuning, 15% benefit (28820 seconds)
ACTION: Run SQL Tuning Advisor on the SQL statement with SQL_ID
"725bgkkhqs73v".
RELEVANT OBJECT: SQL statement with SQL_ID 725bgkkhqs73v and
PLAN_HASH 2688602638
select column1,column2 from table1;
ACTION: Investigate the SQL statement with SQL_ID "725bgkkhqs73v" for
possible performance improvements.
RELEVANT OBJECT: SQL statement with SQL_ID 725bgkkhqs73v and
PLAN_HASH 2688602638
select column1, column2 from table1;
RATIONALE: SQL statement with SQL_ID "725bgkkhqs73v" was executed 32 times and had an average elapsed time of 900 seconds.
Can anyone help me out with the reason behind these repeated executions of the SQL query thus resulting in a avg elapsed time of 15 mins. Also, I could see that some queries ran on the DB even for 145,445,335 times, however the total time elapsed for executing these queries was only 0.000048 seconds.
COuld it be because there was exclusive locks on those tables during the times there queries were getting executed or do I need to look at query tuning here? Kindly help.

Answer 1

yeah. posting it here:
select column1,column2 from table1;
Plan hash value: 2688602638
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | | | 4 (100)| |
| 1 | HASH GROUP BY | | 1 | 77 | 4 (25)| 00:00:01 |
| 2 | TABLE ACCESS BY INDEX ROWID| column1 | 1 | 18 | 1 (0)| 00:00:01 |
| 3 | NESTED LOOPS | | 1 | 77 | 3 (0)| 00:00:01 |
| 4 | TABLE ACCESS FULL | column2 | 1 | 59 | 2 (0)| 00:00:01 |
| 5 | INDEX RANGE SCAN | x_abc | 1605 | | 1 (0)| 00:00:01 |
SQL_ID 725bgkkhqs73v
select column1, column2 from table1;
Plan hash value: 2947532035
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | | | 4 (100)| |
| 1 | HASH GROUP BY | | 41 | 1476 | 4 (50)| 00:00:01 |
| 2 | TABLE ACCESS BY INDEX ROWID | column1 | 14 | 252 | 1 (0)| 00:00:01 |
| 3 | NESTED LOOPS | | 50 | 1800 | 2 (0)| 00:00:01 |
| 4 | TABLE ACCESS BY INDEX ROWID| column1 | 3 | 54 | 1 (0)| 00:00:01 |
| 5 | INDEX RANGE SCAN | X_abc| 1602 | | 1 (0)| 00:00:01 |
| 6 | INDEX RANGE SCAN | XAK_def| 14 | | 1 (0)| 00:00:01 |
Does this shed any light?
Thanks in advance for all your help!