V$SHARED_POOL_RESERVED

V$SHARED_POOL_RESERVED displays statistics that help you tune the reserved pool and space within the shared pool.

Column Datatype Description
FREE_SPACE NUMBER Total amount of free space on the reserved list in bytesFoot 1
AVG_FREE_SIZE NUMBER Average size of the free memory on the reserved list in bytesFoot 1
FREE_COUNT NUMBER Number of free pieces of memory on the reserved listFoot 1
MAX_FREE_SIZE NUMBER Size of the largest free piece of memory on the reserved list in bytesFoot 1
USED_SPACE NUMBER Total amount of used memory on the reserved list in bytesFoot 1
AVG_USED_SIZE NUMBER Average size of the used memory on the reserved list in bytesFoot 1
USED_COUNT NUMBER Number of used pieces of memory on the reserved listFoot 1
MAX_USED_SIZE NUMBER Size of the largest used piece of memory on the reserved list in bytesFoot 1
REQUESTS NUMBER Number of times that the reserved list was searched for a free piece of memoryFoot 1
REQUEST_MISSES NUMBER Number of times the reserved list did not have a free piece of memory to satisfy the request, and started flushing objects from the LRU listFoot 1
LAST_MISS_SIZE NUMBER Request size of the last request miss in bytes, when the reserved list did not have a free piece of memory to satisfy the request and started flushing objects from the LRU listFoot 1
MAX_MISS_SIZE NUMBER Request size of the largest request miss in bytes, when the reserved list did not have a free piece of memory to satisfy the request and started flushing objects from the LRU listFoot 1
REQUEST_FAILURES NUMBER Number of times that no memory was found to satisfy a request. If an internal flush (used to free up memory) does not meet a memory need, then the error ORA-04031 occurs.Foot 2
LAST_FAILURE_SIZE NUMBER Request size of the last failed request in bytes. If an internal flush (used to free up memory) does not meet a memory need, then the error ORA-04031 occurs.Foot 2
ABORTED_REQUEST_THRESHOLD NUMBER Minimum size of a request in bytes which signals an ORA-04031 error without flushing objectsFoot 2
ABORTED_REQUESTS NUMBER Number of requests that signalled an ORA-04031 error without flushing objectsFoot 2
LAST_ABORTED_SIZE NUMBER Last size of the request in bytes that returned an ORA-04031 error without flushing objects from the LRU listFoot 2
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

Footnote 1

These columns are valid only if the initialization parameter SHARED_POOL_RESERVED_SIZE is set to a valid value.

Footnote 2

These columns contain values which are valid even if SHARED_POOL_RESERVED_SIZE is not set.