首先我们从连接的Ring Buffer数据返回的XML来入手。
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SELECT
CAST
(record
as
xml)
AS
record_data
FROM
sys.dm_os_ring_buffers
WHERE
ring_buffer_type=
'RING_BUFFER_CONNECTIVITY'
|
执行上面的语句,得到下面的结果:
点击XML的超链接,打开文件内容看到更可读的内容,包括一条基本的Ring Buffer连接Error记录。
可以看到在XML文档中有许多相当有用的信息。像SniConsumerError,State和RemoteHost这些。
特别注意的是,RecordType节点,对于我们上面的截图来看标识为“Error”,说明是连接错误信息。为了识别这种类型的连接Ring Buffer,我们可以查询SniConsumerError代码号,准确定位是什么错误导致的。
RecordType包含那些值?
1. Error – 连接错误
2. LoginTimers – 连接超时
3. ConnectionClose – 杀掉进程
可以通过如下脚本,将XML数据转化为可读信息:
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;
WITH
RingBufferConnectivity
as
(
SELECT
records.record.value(
'(/Record/@id)[1]'
,
'int'
)
AS
[RecordID],
records.record.value(
'(/Record/ConnectivityTraceRecord/RecordType)[1]'
,
'varchar(max)'
)
AS
[RecordType],
records.record.value(
'(/Record/ConnectivityTraceRecord/RecordTime)[1]'
,
'datetime'
)
AS
[RecordTime],
records.record.value(
'(/Record/ConnectivityTraceRecord/SniConsumerError)[1]'
,
'int'
)
AS
[Error],
records.record.value(
'(/Record/ConnectivityTraceRecord/State)[1]'
,
'int'
)
AS
[State],
records.record.value(
'(/Record/ConnectivityTraceRecord/Spid)[1]'
,
'int'
)
AS
[Spid],
records.record.value(
'(/Record/ConnectivityTraceRecord/RemoteHost)[1]'
,
'varchar(max)'
)
AS
[RemoteHost],
records.record.value(
'(/Record/ConnectivityTraceRecord/RemotePort)[1]'
,
'varchar(max)'
)
AS
[RemotePort],
records.record.value(
'(/Record/ConnectivityTraceRecord/LocalHost)[1]'
,
'varchar(max)'
)
AS
[LocalHost]
FROM
(
SELECT
CAST
(record
as
xml)
AS
record_data
FROM
sys.dm_os_ring_buffers
WHERE
ring_buffer_type=
'RING_BUFFER_CONNECTIVITY'
) TabA
CROSS
APPLY record_data.nodes(
'//Record'
)
AS
records (record)
)
SELECT
RBC.*, m.text
FROM
RingBufferConnectivity RBC
LEFT
JOIN
sys.messages M
ON
RBC.Error = M.message_id
AND
M.language_id = 1033
WHERE
RBC.RecordType=
'Error'
--Comment Out to see all RecordTypes
ORDER
BY
RBC.RecordTime
DESC
|
执行上面的查询后,将得到下面的可读结果。在这个查询中,我们关联Ring Buffer数据和sys.messages视图去抓取Error id的文本。通过这个信息我们可以跟踪到精确的导致Error:Login失败的信息。
本文转自UltraSQL51CTO博客,原文链接:http://blog.51cto.com/ultrasql/1583446 ,如需转载请自行联系原作者