Two frequency distribution graphs are shown. The top graph shows megabytes of I/O per second by function. Its horizontal axis measures seconds in increments of .05 second. Its vertical axis measures megabytes per second. The bottom graphic shows I/O requests per second. Its horizontal axis measures seconds in increments of .05 second. Its vertical axis measures requests per second.

Both graphs have shaded areas to show the megabytes or requests, respectively, for each of 12 functions. The functions, listed to the right of each graphic are: ARCH, Buffer Cache Reads, DBWR, Data Pump, Direct Reads, Direct Writes, LGWR, Others, RMAN, Recovery, Streams AQ, and XDB. The I/O for each function is represented by a different color. The colors are stacked to show the cumulative megabytes and requests, respectively, at each fractional second.