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