5.5 Flood Control for Similar Issues

Flood control mechanism helps you save resource through fewer repeat collections for similar issues.

You can:
  • Enable or disable flood control.
  • How many times to collect for an event.
  • Pause flood control.

The flood control data is stored in Berkeley Database and persists across Oracle Trace File Analyzer restarts.

Example 5-1 Flood Control Examples

To check if flood control is enabled or disabled:
# tfactl get floodcontrol
.----------------------------------------.
|               testhost                 |
+--------------------------------+-------+
| Configuration Parameter        | Value |
+--------------------------------+-------+
| Flood Control ( floodcontrol ) | ON    |
'--------------------------------+-------'
To check flood control limit:
# tfactl get fc.limit
.------------------------------------------------.
|                   testhost                     |
+----------------------------------------+-------+
| Configuration Parameter                | Value |
+----------------------------------------+-------+
| Flood Control Limit Count ( fc.limit ) | 3     |
'----------------------------------------+-------'
To check flood control limit time:
# tfactl get fc.limittime
.-------------------------------------------------------------.
|                          testhost                           |
+-----------------------------------------------------+-------+
| Configuration Parameter                             | Value |
+-----------------------------------------------------+-------+
| Flood Control Limit Time (minutes) ( fc.limitTime ) | 60    |
'-----------------------------------------------------+-------'
To check flood control pause time:
# tfactl get fc.pausetime
.-------------------------------------------------------------.
|                          testhost                           |
+-----------------------------------------------------+-------+
| Configuration Parameter                             | Value |
+-----------------------------------------------------+-------+
| Flood Control Pause Time (minutes) ( fc.pauseTime ) | 120   |
'-----------------------------------------------------+-------'
To print flood control details:
# tfactl floodcontrol print

.----------------------------------------------------------------------------------------------------------------------------------------------------------.
| Event                  | Count | Start Date                   | Last Date                    | Limit | Limit Time | Pause Time | Coll Count | Skip Count |
+------------------------+-------+------------------------------+------------------------------+-------+------------+------------+------------+------------+
| orcl:ORA-00600:user1   |     1 | Thu May 21 09:18:56 UTC 2020 | Thu May 21 09:18:56 UTC 2020 |     3 |         60 |        120 |          1 |          0 |
+------------------------+-------+------------------------------+------------------------------+-------+------------+------------+------------+------------+
| orcl:ORA-00600:user2   |     1 | Thu May 21 09:18:25 UTC 2020 | Thu May 21 09:18:25 UTC 2020 |     3 |         60 |        120 |          4 |          2 |
'------------------------+-------+------------------------------+------------------------------+-------+------------+------------+------------+------------'
To clear flood control:
# tfactl floodcontrol clear -event orcl:ORA-00600:user1
Successfully cleared Event orcl:ORA-00600:user1

# tfactl floodcontrol print
.---------------------------------------------------------------------------------------------------------------------.
| Event                  | Count | Start Date | Last Date | Limit | Limit Time | Pause Time | Coll Count | Skip Count |
+------------------------+-------+------------+-----------+-------+------------+------------+------------+------------+
| orcl:ORA-00600:user1   |     0 | null       | null      |     3 |         60 |        120 |          3 |          2 |
'------------------------+-------+------------+-----------+-------+------------+------------+------------+------------'
To udate flood control details:
# tfactl floodcontrol update -event orcl:ORA-00600:user1 -limit 10 -limittime 90 -pausetime 180
Successfully updated Flood Control Event

# tfactl floodcontrol print -event orcl:ORA-00600:user1
.----------------------------------------------------------------------------------------------------------------------------------------------------------.
| Event                  | Count | Start Date                   | Last Date                    | Limit | Limit Time | Pause Time | Coll Count | Skip Count |
+------------------------+-------+------------------------------+------------------------------+-------+------------+------------+------------+------------+
| orcl:ORA-00600:user1   |     1 | Thu May 21 09:18:25 UTC 2020 | Thu May 21 09:18:25 UTC 2020 |    10 |         90 |        180 |          4 |          2 |
'------------------------+-------+------------------------------+------------------------------+-------+------------+------------+------------+------------'

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