9.88 V$STREAMS_POOL_ADVICE

V$STREAMS_POOL_ADVICE displays information about the estimated count of spilled or unspilled messages and the associated time spent in the spill or unspill activity for different Streams pool sizes. The sizes range from 10% to 200% of the current Streams pool size, in equal intervals. The value of the interval depends on the current size of the Streams pool.
Column Datatype Description

STREAMS_POOL_SIZE_FOR_ESTIMATE

NUMBER

Streams pool size (in megabytes) for the estimate. The size ranges from values smaller than the current Streams pool size to values larger than the current Streams pool size, and there is a separate row for each increment. There is always an entry that shows the current Streams pool size, and there are always 20 increments. The range and the size of the increments depend on the current size of the Streams pool.

STREAMS_POOL_SIZE_FACTOR

NUMBER

Size factor with respect to the current Streams pool size

ESTD_SPILL_COUNT

NUMBER

Estimated count of messages spilled from the Streams pool

ESTD_SPILL_TIME

NUMBER

Estimated elapsed time (in seconds) to spill

ESTD_UNSPILL_COUNT

NUMBER

Estimated count of unspills (read back from disk)

ESTD_UNSPILL_TIME

NUMBER

Estimated elapsed time (in seconds) to unspill

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