Aí vai:
http://docs.oracle.com/cd/B10500_01/ser ... totrac.htm
recursive calls
Number of recursive calls generated at both the user and system level. Oracle maintains tables used for internal processing. When Oracle needs to make a change to these tables, it internally generates an internal SQL statement, which in turn generates a recursive call.
db block gets
Number of times a CURRENT block was requested.
consistent gets
Number of times a consistent read was requested for a block.
physical reads
Total number of data blocks read from disk. This number equals the value of "physical reads direct" plus all reads into buffer cache.
redo size
Total amount of redo generated in bytes.
bytes sent via SQL*Net to client
Total number of bytes sent to the client from the foreground processes.
bytes received via SQL*Net from client
Total number of bytes received from the client over Oracle Net.
SQL*Net roundtrips to/from client
Total number of Oracle Net messages sent to and received from the client.
sorts (memory)
Number of sort operations that were performed completely in memory and did not require any disk writes.
sorts (disk)
Number of sort operations that required at least one disk write.
rows processed
Number of rows processed during the operation.