|Flushing the shared pool|
|Flushing the buffer cache|
|Forcing a checkpoint|
|Forcing a logfile switch|
To flush the shared pool use:
ALTER SYSTEM FLUSH SHARED_POOL;
In Oracle 10.1 and above, the following supported command can be used to flush the buffer cache:
ALTER SYSTEM FLUSH BUFFER_CACHE;
In Oracle 9.0.1 and above the following unsupported command can also be used to flush the buffer cache:
ALTER SESSION SET EVENTS 'immediate trace name flush_cache';
After this command has been executed, the STATE column for all rows in X$BH will be zero unless the block is currently pinned.
In Oracle 18.104.22.168 (Windows 2000) the equivalent ORADEBUG command fails with ORA-3113.
To force a checkpoint use:
ALTER SYSTEM CHECKPOINT;
To force a logfile switch use:
ALTER SYSTEM SWITCH LOGFILE;