SNAP_ID | 
NUMBER | 
  | 
Unique snapshot ID | 
DBID | 
NUMBER | 
  | 
Database ID for the snapshot | 
INSTANCE_NUMBER | 
NUMBER | 
  | 
Instance number for the snapshot | 
PARAMETER | 
VARCHAR2(32) | 
  | 
Name of the initialization parameter that determines the number of entries in the data dictionary cache | 
TOTAL_USAGE | 
NUMBER | 
  | 
Sum of the total number of entries in the cache | 
USAGE | 
NUMBER | 
  | 
Number of cache entries that contain valid data | 
GETS | 
NUMBER | 
  | 
Total number of requests for information on the data object | 
GETMISSES | 
NUMBER | 
  | 
Number of data requests resulting in cache misses | 
SCANS | 
NUMBER | 
  | 
Number of scan requests | 
SCANMISSES | 
NUMBER | 
  | 
Number of times a scan failed to find the data in the cache | 
SCANCOMPLETES | 
NUMBER | 
  | 
For a list of subordinate entries, the number of times the list was scanned completely | 
MODIFICATIONS | 
NUMBER | 
  | 
Number of inserts, updates, and deletions | 
FLUSHES | 
NUMBER | 
  | 
Number of times flushed to disk | 
DLM_REQUESTS | 
NUMBER | 
  | 
Number of DLM requests | 
DLM_CONFLICTS | 
NUMBER | 
  | 
Number of DLM conflicts | 
DLM_RELEASES | 
NUMBER | 
  | 
Number of DLM releases |