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我有一些全文目录，从前一段时间，查询时间真的变慢了，到目前为止我发现的唯一解决方案是重建目录，有时一天不止一次使用命令：

ALTER FULLTEXT CATALOG TABLE1 REBUILD

为什么需要重建目录？这个问题还有其他解决方案吗？

运行重建命令后，查询是即时的，当减速可能需要几秒钟或一分钟。

我的目录已由此代码创建：

DECLARE @catalog VARCHAR(255)
DECLARE @pkCatalog VARCHAR(255)
SET @catalog = 'TABLE1' 
SET @pkCatalog = 'PK_' + @catalog

EXEC sp_fulltext_database 'enable'

EXEC sp_fulltext_catalog @catalog, 'create'

EXEC sp_fulltext_table @catalog, 'create', @catalog, @pkCatalog

----------------------------------- INICIO CURSOR: cursorColumn
DECLARE cursorColumn CURSOR 
FOR
select name from syscolumns where id=object_id(@catalog) and xtype = 167
FOR READ ONLY
 
OPEN cursorColumn
DECLARE @colName SYSNAME
FETCH NEXT FROM cursorColumn INTO @colName
WHILE (@@fetch_status <> -1)
 BEGIN  

   EXEC sp_fulltext_column @catalog,@colName,'add'

   FETCH NEXT FROM cursorColumn INTO @colName
 
 END  
CLOSE cursorColumn 
DEALLOCATE cursorColumn 
------------------------------------- FIM CURSOR: cursorColumn 

EXEC sp_fulltext_table @catalog,'activate'

EXEC sp_fulltext_table @catalog, 'Start_change_tracking'
EXEC sp_fulltext_table @catalog, 'Start_background_updateindex'
GO
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