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Oracle® Database Reference 10g Release 2 (10.2) Part Number B14237-02 |
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# DBA_HIST_SGA_TARGET_ADVICE

`DBA_HIST_SGA_TARGET_ADVICE` provides historical information about the `SGA_TARGET` initialization parameter.

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
`SGA_SIZE` | `NUMBER` | `NOT NULL` | Size of the SGA
`SGA_SIZE_FACTOR` | `NUMBER` | `NOT NULL` | Ratio between the `SGA_SIZE` and the current size of the SGA
`ESTD_DB_TIME` | `NUMBER` | `NOT NULL` | Estimated DB_TIME for this SGA_SIZE
`ESTD_PHYSICAL_READS` | `NUMBER` |  | Estimated number of physical reads