sys.fulltext_index_fragments (Transact-SQL)
A fulltext index uses internal tables called full-text index fragments to store the inverted index data. This view can be used to query the metadata about these fragments. This view contains a row for each full-text index fragment in every table that contains a full-text index.
Column name |
Data type |
Description |
|---|---|---|
table_id |
int |
Object ID of the table that contains the full-text index fragment. |
fragment_object_id |
int |
Object ID of the internal table associated with the fragment. |
fragment_id |
int |
Logical ID of the full-text index fragment. This is unique across all fragments for this table. |
timestamp |
timestamp |
Timestamp associated with the fragment creation. The timestamps of more recent fragments are larger than the timestamps of older fragments. |
data_size |
int |
Logical size of the fragment in bytes. |
row_count |
int |
Number of individual rows in the fragment. |
status |
int |
Status of the fragment, one of: 0 = Newly created and not yet used 1 = Being used for insert during fulltext index population or merge 4 = Closed. Ready for query 6 = Being used for merge input and ready for query 8 = Marked for deletion. Will not be used for query and merge source. A status of 4 or 6 means that the fragment is part of the logical full-text index and can be queried; that is, it is a queryable fragment. |
Remarks
The sys.fulltext_index_fragments catalog view can be used to query the number of fragments comprising a full-text index. If you are experiencing slow full-text query performance, you can use sys.fulltext_index_fragments to query for the number of queryable fragments (status = 4 or 6) in the full-text index, as follows:
SELECT table_id, status FROM sys.fulltext_index_fragments
WHERE status=4 OR status=6;
If many queryable fragments exist, Microsoft recommends that you reorganize the full-text catalog that contains the full-text index to merge the fragments together. To reorganize a of full-text catalog use ALTER FULLTEXT CATALOG catalog_name REORGANIZE. For example, to reorganize a full-text catalog named ftCatalog in the AdventureWorks database, enter:
USE AdventureWorks;
GO
ALTER FULLTEXT CATALOG ftCatalog REORGANIZE;
GO
Permissions
The visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission.
See Also
Reference
Object Catalog Views (Transact-SQL)