9.173 V$RESULT_CACHE_STATISTICS

V$RESULT_CACHE_STATISTICS displays various result cache settings and usage statistics.

Column Datatype Description

ID

NUMBER

Statistic number

NAME

VARCHAR2(128)

Name of the statistic (see Table 9-6)

VALUE

VARCHAR2(81)

Value of the statistic

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data

Table 9-6 V$RESULT_CACHE_STATISTICS and V$RESULT_SUBCACHE_STATISTICS Statistics

Statistic Name Description

Block Count Current

Number of memory blocks currently allocated

Block Count Maximum

Maximum number of memory blocks allowed

Block Size (Bytes)

Size of each memory block

Create Count Failure

Number of cache results that failed to create

Create Count Success

Number of cache results successfully created

Delete Count Invalid

Number of invalid cached results deleted

Delete Count Valid

Number of valid cached results deleted

Find Copy Count

Number of results copied directly out of the cache

Find Count

Number of cached results that were successfully found

Global Load Rate

Rate at which cached results were fetched from remote instances (in bytes per 10 milliseconds)

Global Prune By Self Count

Number of times this instance did not provide a cached result to a remote instance because this instance deemed it inefficient to do so

Global Prune Count

Number of times this instance did not fetch a cached result from a remote instance because it was deemed inefficient to do so

Hash Chain Length

Average length of items in the hash chain

Invalidation Count

Total number of invalidations

Result Size Maximum (Blocks)

Maximum number of blocks allowed for a single result

Subcache Count

Number of subcaches in the result cache