sys.dm_fts_index_population (Transact-SQL)
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Returns information about the full-text index and semantic key phrase populations currently in progress in SQL Server.
| Column name | Data type | Description |
|---|---|---|
| database_id | int | ID of the database that contains the full-text index being populated. |
| catalog_id | int | ID of the full-text catalog that contains this full-text index. |
| table_id | int | ID of the table for which the full-text index is being populated. |
| memory_address | varbinary(8) | Memory address of the internal data structure that is used to represent an active population. |
| population_type | int | Type of population. One of the following: 1 = Full population 2 = Incremental timestamp-based population 3 = Manual update of tracked changes 4 = Background update of tracked changes. |
| population_type_description | nvarchar(120) | Description for type of population. |
| is_clustered_index_scan | bit | Indicates whether the population involves a scan on the clustered index. |
| range_count | int | Number of sub-ranges into which this population has been parallelized. |
| completed_range_count | int | Number of ranges for which processing is complete. |
| outstanding_batch_count | int | Current number of outstanding batches for this population. For more information, see sys.dm_fts_outstanding_batches (Transact-SQL). |
| status | int | Applies to: SQL Server 2012 (11.x) and later. Status of this Population. Note: some of the states are transient. One of the following: 3 = Starting 5 = Processing normally 7 = Has stopped processing For example, this status occurs when an auto merge is in progress. 11 = Population aborted 12 = Processing a semantic similarity extraction |
| status_description | nvarchar(120) | Description of status of the population. |
| completion_type | int | Status of how this population completed. |
| completion_type_description | nvarchar(120) | Description of the completion type. |
| worker_count | int | This value is always 0. |
| queued_population_type | int | Type of the population, based on tracked changes, which will follow the current population, if any. |
| queued_population_type_description | nvarchar(120) | Description of the population to follow, if any. For example, when CHANGE TRACKING = AUTO and the initial full population is in progress, this column would show "Auto population." |
| start_time | datetime | Time that the population started. |
| incremental_timestamp | timestamp | Represents the starting timestamp for a full population. For all other population types this value is the last committed checkpoint representing the progress of the populations. |
Remarks
When statistical semantic indexing is enabled in addition to full-text indexing, the semantic extraction and population of key phrases, and the extraction of document similarity data, occur simultaneously with full-text indexing. The population of the document similarity index occurs later in a second phase. For more information, see Manage and Monitor Semantic Search.
Permissions
On SQL Server and SQL Managed Instance, requires VIEW SERVER STATE permission.
On SQL Database Basic, S0, and S1 service objectives, and for databases in elastic pools, the server admin account, the Microsoft Entra admin account, or membership in the ##MS_ServerStateReader## server role is required. On all other SQL Database service objectives, either the VIEW DATABASE STATE permission on the database, or membership in the ##MS_ServerStateReader## server role is required.
Permissions for SQL Server 2022 and later
Requires VIEW SERVER PERFORMANCE STATE permission on the server.
Physical joins
Relationship cardinalities
| From | To | Relationship |
|---|---|---|
dm_fts_active_catalogs.database_id |
dm_fts_index_population.database_id |
One-to-one |
dm_fts_active_catalogs.catalog_id |
dm_fts_index_population.catalog_id |
One-to-one |
dm_fts_population_ranges.parent_memory_address |
dm_fts_index_population.memory_address |
Many-to-one |
Next steps
Dynamic Management Views and Functions (Transact-SQL)
Full-Text Search and Semantic Search Dynamic Management Views and Functions (Transact-SQL)