What is Sqlperf?

What is Sqlperf?

Provides transaction log space usage statistics for all databases. In SQL Server it can also be used to reset wait and latch statistics.

What does DBCC Sqlperf do?

DBCC SQLPERF is very useful command that we use to get multiple statistics related information in SQL Server. This command provides transaction log space statistics and wait statistics information at instance level and we also use it to reset wait and latch statistics data.

What is Fn_dblog?

The fn_dblog() function (formerly known as the DBCC command) is one of several undocumented functions for SQL Server. It allows you to view the transaction log records in the active part of the transaction log file for the current database.

What is Log_reuse_wait_desc?

Firstly, what is log_reuse_wait_desc? It’s a field in sys. databases that you can use to determine why the transaction log isn’t clearing (a.k.a truncating) correctly.

How do you read transaction logs?

View Log Files

1. Right-click SQL Server Logs, point to View, and then click either SQL Server Log or SQL Server and Windows Log.
2. Expand SQL Server Logs, right-click any log file, and then click View SQL Server Log. You can also double-click any log file.

What is DBCC Opentran?

DBCC OPENTRAN helps to identify active transactions that may be preventing log truncation. DBCC OPENTRAN displays information about the oldest active transaction and the oldest distributed and nondistributed replicated transactions, if any, within the transaction log of the specified database.

What is DBCC Loginfo?

Getting information about SQL Server virtual logs using DBCC LOGINFO. The next command to look at is DBCC LOGINFO. This will give you information about your virtual logs inside your transaction log. This will tell you what portions of the log are in use and which are not in use Status = 0.

What is null backup in SQL Server?

NUL is basically a location you can send a backup to. Then as far as SQL Server is concerned you took a backup, but the backup file is never actually created.

What is a transaction log in a database?

A transaction log is used to record the fact that a transaction is set to occur as well as the information needed by the database server to recover the data back to a consistent state in event of a sever failure while it is writing information to disk.

What is SYS Database_files?

Contains a row per file of a database as stored in the database itself. This is a per-database view. sys.database_files (Transact-SQL) Column name.

Which is an example of a dataspace?

Dataspaces shift the emphasis to a data co-existence approach providing base functionality over all data sources, regardless of how integrated they are. For example, a DataSpace Support Platform (DSSP) can provide keyword search over all of its data sources, similar to that provided by existing desktop search systems.

What do you need to know about DBCC sqlperf?

DBCC SQLPERF: 1 ProvidesTransaction log space usage for all log files on an instance 2 Used to clear out data related to weight statistics, latch statistics, or spinlock statistics 3 To run this command, you need to have ( VIEW SERVER STATE, ALTER SERVER STATE ) 4 Execution does not affect system performance

What is the role of dataspaces in HDF5?

The HDF5 dataspace is a required component of an HDF5 dataset or attribute definition. The dataspace defines the size and shape of the dataset or attribute raw data. In other words, a dataspace defines the number of dimensions and the size of each dimension of the multidimensional array in which the raw data is represented.

Why are dataspaces important in data integration system?

Dataspaces are an abstraction in data management that aim to overcome some of the problems encountered in data integration system. The aim is to reduce the effort required to set up a data integration system by relying on existing matching and mapping generation techniques, and to improve the system in “pay-as-you-go” fashion as it is used.