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Stores information about the table's analyze statistics over time.

Column NameColumn Description
ORTA_DATABASE_IDID of the database.
ORTA_CHANGE_TIMEDate of the change.
ORTA_OWNEROwner of the table.
ORTA_OBJECT_NAMEName of the table.
ORTA_EXTENTSNumber of extents in the table.
ORTA_SEGMENT_BLOCKSNumber of blocks allocated to the table.
ORTA_NUM_ROWSNumber of rows in the table.
ORTA_BLOCKSNumber of used data blocks in the table.
ORTA_EMPTY_BLOCKSNumber of empty (never used) data blocks in the table.
ORTA_AVG_SPACEAverage amount of freed space (in bytes) in a data block allocated to the table.
ORTA_CHAIN_CNTNumber of rows in the table that are chained from one data block to another or that have migrated to a new block, requiring a link to preserve the old ROWID.
ORTA_AVG_ROW_LENAverage row length in the table in bytes.
ORTA_LAST_ANALYZEDDate this table was most recently analyzed.

PS_ORIO_INDEXES_OVER_TIME

Stores information about the index's analyze statistics over time.

Column NameColumn Description
ORIO_DATABASE_IDID of the database.
ORIO_CHANGE_TIMEDate of the change.
ORIO_OWNEROwner of the index.
ORIO_OBJECT_NAMEName of the index.
ORIO_TABLE_OWNEROwner of the table.
ORIO_TABLE_NAMEName of the table.
ORIO_BLEVELB*-Tree level: depth of the index from its root block to its leaf blocks. A depth of 0 indicates that the root block and leaf block are the same.
ORIO_LEAF_BLOCKS
ORIO_DISTINCT_KEYSORIO_AVG_LEAF_BLOCKS_PER_KEYORIO_ORIO_ORIO_ORIO_

...

Number of leaf blocks in the index.
ORIO_DISTINCT_KEYS

Number of distinct indexed values.

For indexes that enforce UNIQUE and PRIMARY KEY constraints, this value is the same as the number of rows in the table (USER_TABLES.NUM_ROWS).

ORIO_AVG_LEAF_BLOCKS_PER

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_KEY

Average number of leaf blocks in which each distinct value in the index appears, rounded to the nearest integer.

For indexes that enforce UNIQUE and PRIMARY KEY constraints, this value is always 1.

ORIO_AVG_DATA_BLOCKS_PER

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_KEY

Average number of data blocks in the table that are pointed to by a distinct value in the index rounded to the nearest integer.

This statistic is the average number of data blocks that contain rows with a given value for the indexed columns.

ORIO_CLUSTERING_FACTOR

Indicates the amount of order of the rows in the table based on the values of the index.

  • If the value is nearly the number of blocks, the table is very well ordered. In this case, the index entries in a single leaf block tend to point to rows in the same data blocks.
  • If the value is nearly the number of rows, the table is very randomly ordered. In this case, it is unlikely that index entries in the same leaf block point to rows in the same data blocks.
ORIO_NUM_ROWSNumber of rows in the index.
ORIO_SAMPLE_SIZESample size used in analyzing this table.
ORIO_LAST_ANALYZEDDate this table was most recently analyzed.

PS_ORCO_COLUMNS_OVER_TIME

Stores information about the table column's analyze statistics over time.

Column NameColumn Description
ORCO_DATABASE_IDID of the database.
ORCO_CHANGE_TIMEDate of the change.
ORCO_OWNEROwner of the table.
ORCO_TABLE_NAMEName of the table.
ORCO_COLUMN_NAMEName of the column.
ORCO_NUM_DISTINCTNumber of distinct values in the column.
ORCO_DENSITYDensity of the column.
ORCO_NUM_NULLSNumber of null values in the column.
ORCO_NUM_BUCKETSNumber of buckets used to analyze the column.
ORCO_LAST_ANALYZEDDate this table was most recently analyzed.

PW_ORWA_V_WAITSTAT_H

Stores information about Oracle block contention statistics over time.

Info

The _T table summarizes the data per hour.

The _D table summarizes the data per day. 

The _W table summarizes the data per week.

The _M table summarizes the data per month.

(N <table_name>) means normalized, the actual name can be retrieved from the <table_name>.

Column NameColumn Description
ORWA_PWII_INSTANCE_IDID of the database.
ORWA_TIMESTAMPDate of the sampling.
ORWA_CLASS_IDClass of the block (N PW_ORCL_CLASS_N).
ORWA_COUNT_SUMNumber of waits by this OPERATION for this CLASS of the block.
ORWA_TIME_SUMTotal value of the wait times for all waits by this OPERATION for this CLASS of the block.
ORWA_MINUTES_COUNT_SUMTotal amount of minutes summed in the row.
ORWA_PWHG_IDThe hour group ID that matches the sampled time.
ORWA_RECEIVED_TIMESTAMPThe timestamp that the row was loaded into the PW.





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