Is there a way to run sys.dm_db_log_space_usage for all databases?

Question

I'm looking to create a monitoring tool to track changes in transaction log usage on a production server we maintain.

Previously, I used DBCC SQLPERF(LOGSPACE);, which provided a list of all databases and their current transaction log memory status. However, Microsoft seem to suggest from 2012, the log details should be viewed from sys.dm_db_log_space_usage, which provides similar detail, but seems to be database specific, rather than giving a view of the server overall (i.e. you must be connected to the database you wish to use).

https://learn.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-sqlperf-transact-sql?view=sql-server-ver15

I guess my question is two fold:

1. Is there a way to use sys.dm_db_log_space_usage for all databases?
2. Are there any reason the DBCC SQLPERF(LOGSPACE); should not be used?

Answer 1

Is there any reason the DBCC SQLPERF(LOGSPACE); should not be used?

Starting with SQL Server 2012 (11.x), use the sys.dm_db_log_space_usage DMV instead of DBCC SQLPERF(LOGSPACE), to return space usage information for the transaction log per database

Is there a way to use sys.dm_db_log_space_usage for all databases?

You can use the following cursor. Maybe it required a more development;

CREATE TABLE [dbo].[Tbl_DbSizes](
    [database_id] [int] NULL,
    [total_log_size_in_bytes] [bigint] NULL,
    [used_log_space_in_bytes] [bigint] NULL,
    [used_log_space_in_percent] [real] NULL,
    [log_space_in_bytes_since_last_backup] [bigint] NULL
) ON [PRIMARY]

GO
DECLARE 
    @queryAsList VARCHAR(MAX) ,@DbName AS VARCHAR(100)

DECLARE Db_List CURSOR
FOR
SELECT name  FROM sys.databases 

OPEN Db_List;

FETCH NEXT FROM Db_List INTO 
   @DbName 

WHILE @@FETCH_STATUS = 0
    BEGIN
        SET @queryAsList = 'INSERT INTO Tbl_DbSizes select * from '+ @DbName + '.' + 'sys.dm_db_log_space_usage'
        EXEC(@queryAsList)

        FETCH NEXT FROM Db_List INTO 
           @DbName
    END;

CLOSE Db_List;

DEALLOCATE Db_List;
SELECT name as databasename , total_log_size_in_bytes  ,
used_log_space_in_bytes,used_log_space_in_percent,log_space_in_bytes_since_last_backup 
FROM Tbl_DbSizes INNER JOIN sys.databases databaseinfo 
ON databaseinfo.database_id= Tbl_DbSizes.database_id

TRUNCATE TABLE [Tbl_DbSizes]


+--------------------+-------------------------+-------------------------+---------------------------+--------------------------------------+
|    databasename    | total_log_size_in_bytes | used_log_space_in_bytes | used_log_space_in_percent | log_space_in_bytes_since_last_backup |
+--------------------+-------------------------+-------------------------+---------------------------+--------------------------------------+
| master             |                 2088960 |                  729088 |                  34.90196 |                               270336 |
| tempdb             |                 8380416 |                  675840 |                  8.064516 |                               299008 |
| model              |                 8380416 |                 1617920 |                  19.30596 |                                73728 |
| msdb               |                 9428992 |                 1208320 |                  12.81494 |                                86016 |
| DWDiagnostics      |                75489280 |                 6467584 |                  8.567553 |                               253952 |
| DWConfiguration    |                 8380416 |                  626688 |                  7.478006 |                               253952 |
| DWQueue            |                 8380416 |                 1404928 |                  16.76442 |                               253952 |
| DemoDb             |                 8380416 |                 1732608 |                  20.67449 |                               266240 |
| ReportServer       |                75489280 |                13873152 |                  18.37765 |                               274432 |
| ReportServerTempDB |                75489280 |                 1925120 |                   2.55019 |                               245760 |
+--------------------+-------------------------+-------------------------+---------------------------+--------------------------------------+