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Author: Jugal Shah

  • Link to download Sample SQL Server Databsae

    Click Me to download sample database

  • Script to check the database Properties

    It is always good to have the idea about the database properties while doing the migration, performance tuning or configuration.

    You can execute the below script to get the database property information.

    select 
 sysDB.database_id,
 sysDB.Name as 'Database Name',
 syslogin.Name as 'DB Owner',
 sysDB.state_desc,
 sysDB.recovery_model_desc,
 sysDB.collation_name, 
 sysDB.user_access_desc,
 sysDB.compatibility_level, 
 sysDB.is_read_only,
 sysDB.is_auto_close_on,
 sysDB.is_auto_shrink_on,
 sysDB.is_auto_create_stats_on,
 sysDB.is_auto_update_stats_on,
 sysDB.is_fulltext_enabled,
 sysDB.is_trustworthy_on
from sys.databases sysDB
INNER JOIN sys.syslogins syslogin ON sysDB.owner_sid = syslogin.sid

  • Monitoring and Troubleshooting using sys.dm_os_ring_buffers

    sys.dm_os_ring_buffers: You can use the undocumented Ring Buffer DMV to troubleshoot the below issues.

    • Security Exceptions
    • Exception raised at SQL Operating System level
    • Connection Dropped By the Server
    • System Resource Utilization
    • Memory Pressure
    • CLR Integration Scheduler State
    • Extended Events Subsystems State

    Execute the below query to get the distinct ring buffer type.

    select distinct ring_buffer_type from sys.dm_os_ring_buffers
    • RING_BUFFER_RESOURCE_MONITOR
    • RING_BUFFER_SCHEDULER_MONITOR
    • RING_BUFFER_MEMORY_BROKER
    • RING_BUFFER_SECURITY_ERROR
    • RING_BUFFER_XE_BUFFER_STATE
    • RING_BUFFER_SCHEDULER
    • RING_BUFFER_CONNECTIVITY
    • RING_BUFFER_EXCEPTION
    • RING_BUFFER_XE_LOG

    Check below script as example to troubleshoot the Security Issue using ring buffer. You can change the ring buffer type in below script to troubleshoot the different issues.

    -- Check the Ring Buffer in SQL Server 2008

SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
SET ANSI_WARNINGS ON
SET ANSI_PADDING ON

SELECT CONVERT (varchar(30), GETDATE(), 121) as Run_Time,
dateadd (ms, (ST.[RecordTime] - sys.ms_ticks), GETDATE()) as [Notification_Time],
ST.* , sys.ms_ticks AS [Current Time]
FROM
(SELECT
RBXML.value('(//Record/Error/ErrorCode)[1]', 'varchar(30)') AS [ErrorCode],
RBXML.value('(//Record/Error/CallingAPIName)[1]', 'varchar(255)') AS [CallingAPIName],
RBXML.value('(//Record/Error/APIName)[1]', 'varchar(255)') AS [APIName],
RBXML.value('(//Record/Error/SPID)[1]', 'int') AS [SPID],
RBXML.value('(//Record/@id)[1]', 'bigint') AS [Record Id],
RBXML.value('(//Record/@type)[1]', 'varchar(30)') AS [Type],
RBXML.value('(//Record/@time)[1]', 'bigint') AS [RecordTime]
FROM (SELECT CAST (record as xml) FROM sys.dm_os_ring_buffers
WHERE ring_buffer_type = 'RING_BUFFER_SECURITY_ERROR') AS RB(RBXML)) ST
CROSS JOIN sys.dm_os_sys_info sys
ORDER BY ST.[RecordTime] ASC

-- Script to Check the Ring Buffer in SQL Server 2005

SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
SET ANSI_WARNINGS ON
SET ANSI_PADDING ON

SELECT CONVERT (varchar(30), GETDATE(), 121) as runtime,
DATEADD (ms, -1 * ((sys.cpu_ticks / sys.cpu_ticks_in_ms) - ST.[RecordTime]), GETDATE()) AS NotificationTime,
ST.* , sys.ms_ticks AS [CurrentTime]
FROM
(SELECT
RBXML.value('(//Record/Error/ErrorCode)[1]', 'varchar(30)') AS [ErrorCode],
RBXML.value('(//Record/Error/CallingAPIName)[1]', 'varchar(255)') AS [CallingAPIName],
RBXML.value('(//Record/Error/APIName)[1]', 'varchar(255)') AS [APIName],
RBXML.value('(//Record/Error/SPID)[1]', 'int') AS [SPID],
RBXML.value('(//Record/@id)[1]', 'bigint') AS [Record Id],
RBXML.value('(//Record/@type)[1]', 'varchar(30)') AS [Type],
RBXML.value('(//Record/@time)[1]', 'bigint') AS [RecordTime]
FROM (SELECT CAST (record as xml) FROM sys.dm_os_ring_buffers
WHERE ring_buffer_type = 'RING_BUFFER_SECURITY_ERROR') AS RB(RBXML)) ST
CROSS JOIN sys.dm_os_sys_info sys
ORDER BY ST.[RecordTime] ASC

    From the output we can see the hexadecimal error code 0x6FD. You have to convert these error code into decimal value, which will be 0x6FD = 1789

    Check the above decimal error codes using the NET HELPMSG command, which will give you more information on the issue.