Exception reporting with dba_hist_filestatxs

The dba_hist_filestatxs view contains important file-level information about Oracle I/O activities.  Because most Oracle databases perform a high amount of reading and writing from disk, the dba_hist_filestatxs view can be very useful for identifying high-use data files.

For an Oracle Database 10g customer using the SAME (Stripe and Mirror Everywhere) approach, this view is indispensable for locating and isolating hot data files.  Many Oracle shops will isolate hot data files onto high-speed solid-state disk (SSD), or relocate the hot files to another physical disk spindle.

A describe of dba_hist_filestatxs is shown below.  The important information relates to physical reads and writes, the actual time spent performing reads and writes, and the wait count associated with each data file for each snapshot.