What is DBCC in SQL?

DBCC is the SQL Server “database consistency checker.” DBCC helps ensure the physical and logical consistency of a database; however, DBCC is not corrective. In short, DBCC is an acronym for Database Console Command, and it seems more of a documentation mistake when it was called Database Consistency Checker.

Is it safe to run DBCC Freeproccache?

The danger is if you run DBCC FREEPROCCACHE with no parameters, it will dump the entire plan cache forcing every plan to be recompiled, similar to if you had just restarted SQL Server (DON’T DO THAT). Running DBCC FREEPROCCACHE with a parameter tells it to just dump one plan and recompile it.

What is buffer cache in SQL Server?

An SQL Server buffer pool, also called an SQL Server buffer cache, is a place in system memory that is used for caching table and index data pages as they are modified or read from disk. The primary purpose of the SQL buffer pool is to reduce database file I/O and improve the response time for data retrieval.

What is with recompile in SQL Server?

RECOMPILE – specifies that after the query is executed, its query execution plan stored in cache is removed from cache. When the same query is executed again, there will be no existing plan in cache, so the query will have to be recompiled.

What is the use of DBCC?

Database Consistency Checker Commands give details in form of statistics about the SQL Server. They can be used for Maintenance of database, index, or filegroup. DBCC Commands can be used to perform validation operations on a database, table, index, catalog, filegroup, or allocation of database pages.

What is the role of DBCC?

The DBCC determines the overall economic targets, expenditure levels, the revenue projection, deficit levels and the financing plan.

Can stored procedures be used as a security layer?

Stored Procedures can also act as an additional security layer. We pass data as a parameter in a Stored Procedure so SPs avoid SQL injection. We can also implement a security model on SPs rather than tables or views.

Why is buffer cache memory needed?

1. Buffer is used to compensate for difference in speed between two processes that exchange or use data. Cache is a smaller and fastest memory component in the computer. 2.

When should I use option recompile?

OPTION(RECOMPILE) tells the server not to cache the pan for given query. This means that another execution of the same query will require to elaborate a new(maybe different) plan. This is used in the queries with parameters to prevent parameter sniffing issue.

Why do we need to recompile stored procedure?

Another reason to force a procedure to recompile is to counteract the “parameter sniffing” behavior of procedure compilation. When SQL Server executes procedures, any parameter values that are used by the procedure when it compiles are included as part of generating the query plan.