6.49 DBA_HIST_SESS_SGA_STATS

DBA_HIST_SESS_SGA_STATS shows usage statistics for high utilization Oracle GoldenGate and XStream sessions.

Column Datatype NULL Description

SNAP_ID

NUMBER

NOT NULL

Unique snapshot ID

DBID

NUMBER

NOT NULL

Database ID for the snapshot

INSTANCE_NUMBER

NUMBER

NOT NULL

Instance number for the snapshot

OBJECT_NAME

VARCHAR2(128)

NOT NULL

Object name

SESSION_TYPE

VARCHAR2(64)

NOT NULL

Type of session

SESSION_MODULE

VARCHAR2(64)

NOT NULL

Session module. Valid values:

  • XStream

  • GoldenGate

SGA_USED

NUMBER

The total amount of shared memory (in bytes) currently used by the session out of the amount allocated (SGA_ALLOCATED)

SGA_ALLOCATED

NUMBER

The total amount of shared memory (in bytes) allocated from the pool for the session

CON_DBID

NUMBER

The database ID of the PDB for the sampled session

CON_ID

NUMBER

The ID of the container that CON_DBID identifies. 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