SQL Server 中的 DBCC(Database Console Commands)命令提供了一系列用于数据库管理和诊断的工具和功能。以下是一些常用的 DBCC 命令及其功能: DBCC CHECKDB: 用于检查整个数据库的物理和逻辑一致性。 sqlCopy Code DBCCCHECKDB('MyDatabase'); DBCC CHECKTABLE: 检查指定表或索引的物理和逻辑一致性。 sqlCopy Code ...
This article gives an overview of the SQL Server DBCC FREEPROCCACHE command and its usage with different examples. To learn more about DBCC commands in SQL Server, I would recommend going through this in-depth article Concept and basics of DBCC Commands in SQL Server Introduction to Execution...
is issued before each of the following DBCC examples in order to better demonstrate the effects of the command by displaying a trace of the output of the DBCC command. It is not actually required to run the DBCC commands examined below. If you run any of the DBCC commands below without th...
Validates the Service Broker data in the database. This means that the DBCC CHECKALLOC, DBCC CHECKTABLE, or DBCC CHECKCATALOG commands don't have to be run separately from DBCC CHECKDB. For more detailed information about the checks that these commands perform, see the descriptions o...
Validates the Service Broker data in the database. This means that the DBCC CHECKALLOC, DBCC CHECKTABLE, or DBCC CHECKCATALOG commands don't have to be run separately from DBCC CHECKDB. For more detailed information about the checks that these commands perform, see the descriptions of...
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The shrink database and shrink file commands can lead to concurrency issues, especially with active maintenance such as rebuilding indexes, or on busy OLTP environments. When your application executes queries against database tables, these queries will acquire and maintain a schema stability lock...
DBCC FREESESSIONCACHE is a useful tool for clearing the session cache in SQL Server, but it should be used with caution. It is generally best to avoid using DBCC commands in production environments, as they can have an impact on server performance. ...
You can shrink a transaction log file while the system is in use (DML commands are also being executed), however this will only affect the inactive portion of the transaction log file. Discover the file_ID for each file with the SQL: SELECT file_id, name FROM sys.database_files; After...
This prevents blocking and concurrency problems when these commands are executed. For more information, see View the Size of the Sparse File of a Database Snapshot (Transact-SQL) and the DBCC Internal Database Snapshot Usage section in DBCC (Transact-SQL). If a snapshot can't be created,...