1. Oracle AI Vector Search User's Guide
  2. Vector Diagnostics
  3. Oracle AI Vector Search Views
  4. Vector Index Views
  5. V$VECTOR_GRAPH_INDEX

V$VECTOR_GRAPH_INDEX

This fixed view provides diagnostic information about In-Memory Neighbor Graph vector indexes and is available with Autonomous Database Serverless (ADB-S).

Column Name Data Type Description

OWNER

VARCHAR2(129)

User name of the vector graph index owner

INDEX_NAME

VARCHAR2(129)

Name of the vector graph index

PARTITION_NAME

VARCHAR2(129)

Object partition name (set to NULL for non-partitioned objects)

INDEX_OBJN

NUMBER

Index object number

ANCHOR_ADDRESS

RAW(8)

The address of the anchor structure of the in-memory neighbor graph index in the vector pool

INDEX_GRAPH_TYPE

VARCHAR2(129)

Type of the constructed graph of this index.

Possible values:
  • HNSW: Hierarchical Navigable Small Worlds. Currently only this graph is supported.

NUM_LAYERS

NUMBER

Number of layers in the constructed graph

NUM_VECTORS

NUMBER

Number of indexed vectors in the vector graph index

SPARSE_LAYER_VECTORS

NUMBER

The total number of vectors in the sparse layers. Note that a sparse layer is defined as any layer above the bottom most layer.

NUM_NEIGHBORS

NUMBER

Maximum number of neighbors a vector can have in the sparse layers

EFCONSTRUCTION

NUMBER

Maximum number of closest vector candidates considered at each step of the search during insertion

TOTAL_EDGES

NUMBER

Number of total edges in the constructed graph as of the latest snapshot

REF_COUNT

 NUMBER

Number used to track readers of the inmemory neighbor graph index. The inmemory neighbor graph index can only be dropped once the refcount is 0.

QUERY_DIST_COUNT

NUMBER

Number of distance computations done as part of queries that used the inmemory neighbor graph index

CREATION_DIST_COUNT

NUMBER

Number of distance computations done as part of the inmemory neighbor graph index creation

PRUNED_NEIGHBORS

NUMBER

Number of neighbors pruned out during the neighbor selection phase of the inmemory neighbor graph index creation

NUM_SNAPSHOTS

NUMBER

Number of snapshots currently tracked for the inmemory neighbor graph index

MAX_SNAPSHOT

NUMBER

The total number of snapshots created so far for the inmemory graph index

ALLOCATED_BYTES

NUMBER

Total amount of memory allocated to this vector graph index, in bytes

USED_BYTES

NUMBER

Total amount of memory currently used by the vector graph index, in bytes

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include the following:

  • 0: This value is used for rows containing data that pertain to the entire multitenant container database (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

Parent topic: Vector Index Views