Sql-server – How to rotate trace logs in SQL Server

Here is a slightly simpler approach that avoids the cursor and nested exec:

SET NOCOUNT ON;

CREATE TABLE #to
(
  DBName SYSNAME,
  FileCount INT
);

DECLARE @v INT;
SELECT @v = CONVERT(INT, PARSENAME(CONVERT(VARCHAR(32), 
  SERVERPROPERTY('ProductVersion')), 4));

DECLARE @sql NVARCHAR(MAX);

SET @sql = N'CREATE TABLE #ti
  (
    ' + CASE WHEN @v >= 11 THEN 'RecoveryUnitId INT,' ELSE '' END + '    
    FileId int
    , FileSize nvarchar(255)
    , StartOffset nvarchar(255)
    , FSeqNo nvarchar(255)
    , Status int
    , Parity int
    , CreateLSN nvarchar(255)
);';

SELECT @sql = @sql + N'
  INSERT #ti EXEC ' + QUOTENAME(name) 
    + '.sys.sp_executesql N''DBCC LOGINFO WITH NO_INFOMSGS'';
  INSERT #to(DBName,FileCount) SELECT N''' + name + ''', COUNT(*) FROM #ti;
  TRUNCATE TABLE #ti;'
FROM sys.databases
WHERE database_id > 4 AND [state] = 0;

EXEC sp_executesql @sql;

SELECT DBName, FileCount FROM #to -- WHERE FileCount > [some threshold];

DROP TABLE #to;

Did you follow the steps in the documentation for doing this?

Move System Databases - SQL Server 2012

To move a system database data or log file as part of a planned relocation or scheduled maintenance operation, follow these steps. This procedure applies to all system databases except the master and Resource databases.

1. For each file to be moved, run the following statement.

   ALTER DATABASE database_name MODIFY FILE ( NAME = logical_name , FILENAME = 'new_path\os_file_name' )

2. Stop the instance of SQL Server or shut down the system to perform maintenance. For more information, see Start, Stop, Pause, Resume, Restart the Database Engine, SQL Server Agent, or SQL Server Browser Service.

3. Move the file or files to the new location.

4. Restart the instance of SQL Server or the server. For more information, see Start, Stop, Pause, Resume, Restart the Database Engine, SQL Server Agent, or SQL Server Browser Service.

5. Verify the file change by running the following query.

   SELECT name, physical_name AS CurrentLocation, state_desc FROM sys.master_files WHERE database_id = DB_ID(N'<database_name>');

If the msdb database is moved and the instance of SQL Server is configured for Database Mail, complete these additional steps.

1. Verify that Service Broker is enabled for the msdb database by running the following query.

   SELECT is_broker_enabled FROM sys.databases WHERE name = N'msdb';

For more information about enabling Service Broker, see ALTER DATABASE (Transact-SQL).

2. Verify that Database Mail is working by sending a test mail.

Critically, note that the command you ran doesn't actually move the physical data files.