How to view the Checkpoint activites in Oracle Database

How to check to how many times you have to scan the short and long tables.
SQL> SELECT name, value
FROM v$sysstat
WHERE name IN ('table scans (short tables)',
'table scans (long tables)')
/
Try to reduce the number by creating proper table indexes. Note that the count for 'Long Tables scan' must be very small.


How to view the Checkpoint activites
Query the V$SYSSTAT directory view for the checkpoint process activity to monitor the checkpoint process.
SQL> SELECT name, value
FROM v$sysstat
WHERE name like 'background check%'
/
If the "background check started" value is greater than the "background check completed" value, you should increase the size of the REDO LOG files.


How to monitor REDO log file parallel write
Query the V$SYSTEM_EVENT directory view to see the Log File Parallel Write Event to monitor and tune a Redo Log file.
SQL> SELECT event, total_waits, time_waited
FROM v$system_event
WHERE event = 'log file parallel write'
/
The "Waits" column indicates a possible I/O problem.