Database - analytics console

Refresh database

Update database list on server.

Analyse

The button performs the process of analyzing databases on the server and displays the results on the right side of the form.

(Checkbox)

The selection of databases that we want to consider is carried out by clicking on the selection field. An orange tick indicates that the database is selected. If there is no tick, the database is not selected.

The Database filter allows you to display the results of the analysis only for the desired databases on the server. By clicking on the arrow, a list of databases will appear, where by clicking on the selection field we can specify for which databases we want to display the data.  

Database

The name of the database on the server.

Scheme Name

Name of a the schema used.

Table

Table name.

Index Name

Index_id

Is_disabled

1 = Index is disabled.
0 = Index is not disabled.

Is_hypothetical

1 = Index is hypothetical and cannot be used directly as a data access path. Hypothetical indexes hold column-level statistics.
0 = Index is not hypothetical.

Has_filter

1 = Index has a filter and only contains rows that satisfy the filter definition.
0 = Index does not have a filter.

Fill_factor

> 0 = FILLFACTOR percentage used when the index was created or rebuilt.
0 = Default value

Always 0 for clustered columnstore indexes.

Total_Writes

Number of updates by user queries. This includes Insert, Delete, and Updates representing number of operations done not the actual rows affected.

For example, if you delete 1000 rows in one statement, this count increments by 1.

Total_Reads

Number of seeks by user queries + Number of scans by user queries that did not use 'seek' predicate + Number of bookmark lookups by user queries.

Difference

Difference=Total_Writes - Total_Reads

The Database filter allows you to display the results of the analysis only for the desired databases on the server. By clicking on the arrow, a list of databases will appear, where by clicking on the selection field we can specify for which databases we want to display the data.  

Database

The name of the database on the server.

Index_advantage

Number of seeks caused by user queries that the recommended index in the group could have been used for.

Average cost of the user queries that could be reduced by the index in the group.

Average percentage benefit that user queries could experience if this missing index group was implemented. The value means that the query cost would on average drop by this percentage if this missing index group was implemented * 0.01)

Last_user_seek

Date and time of last seek caused by user queries that the recommended index in the group could have been used for.

DatabaseSchemeTable

Name of the table where the index is missing.

Missing_indexes_for_table

Count of missing indexes.

Similar_missing_indexes_for table

Count of similiar missing indexes.

Equality_columns

Comma-separated list of columns that contribute to equality predicates of the form: table.column = constant_value

Inequality_columns

Comma-separated list of columns that contribute to inequality predicates, for example, predicates of the form: table.column > constant_value
Any comparison operator other than "=" expresses inequality.

User_seeks

Number of seeks caused by user queries that the recommended index in the group could have been used for.

Avg_total_user_cost

Average cost of the user queries that could be reduced by the index in the group.

Avg_user_impact

Average percentage benefit that user queries could experience if this missing index group was implemented. The value means that the query cost would on average drop by this percentage if this missing index group was implemented.

ShortQueryText

Short query text.

TableName

Table name. 

TableRows

Table rows.

The Database filter allows you to display the results of the analysis only for the desired databases on the server. By clicking on the arrow, a list of databases will appear, where by clicking on the selection field we can specify for which databases we want to display the data.  

Database

The name of the database on the server.

Drive

Operating-system file name.

VolumeMountPoint

Mount point at which the volume is rooted. Can return an empty string. Returns null on Linux operating system.

ReadLatency_ms

Total time, in milliseconds, that the users waited for reads issued on the file/

Number of reads issued on the file.

WriteLatency_ms

Total time, in milliseconds, that users waited for writes to be completed on the file/Number of writes made on this file

OverallLatency_ms

Total time, in milliseconds, that users waited for I/O to be completed on the file/(Number of reads issued on the file + Number of writes made on this file).

Avg_Bytes_Read

Total number of bytes read on this file/Number of reads issued on the file.

Avg_Bytes_Write

Total number of bytes written to the file/Number of writes made on this file.

Avg_Bytes_REadWrite

(Total number of bytes read on this file + Total number of bytes written to the file)/(Number of reads issued on the file + Number of writes made on this file).

The Database filter allows you to display the results of the analysis only for the desired databases on the server. By clicking on the arrow, a list of databases will appear, where by clicking on the selection field we can specify for which databases we want to display the data.  

Database

The name of the database on the server.

FileName

Operating-system file name.

FileType

Description of the file type:

• ROWS
• LOG
• FILESTREAM
• FULLTEXT (Full-text catalogs earlier than SQL Server 2008 (10.0.x).)

FileSize_MB

Current file size, in 8-KB pages. For a database snapshot, size reflects the maximum space that the snapshot can ever use for the file.

HINT This field is populated as zero for FILESTREAM containers. Query the sys.database_files catalog view for the actual size of FILESTREAM containers.

Avg_Read_Latency_ms

Total time, in milliseconds, that the users waited for reads issued on the file/

(1.0 + Number of reads issued on the file).

Avg_Write_Latency_ms

Total time, in milliseconds, that users waited for writes to be completed on the file/(1.0 + Number of writes made on this file).

Avg_IO_Latency_ms

(Total time, in milliseconds, that the users waited for reads issued on the file + Total time, in milliseconds, that users waited for writes to be completed on the file)/(1.0 + Number of reads issued on the file + Number of writes made on this file).