ETLDB性能差（HIS转储200万门诊处方zjysb012）
解决方法：
1.禁用cdc.Hismz_capture
2.停止cdc.Hismz_capture
3.关闭zjysb012，zjysb012 CDC功能
4.启用cdc.Hismz_capture
5.开始：cdc.Hismz_capture
6.开启zjysb012，zjysb012 CDC功能
7.手工执行zjysb012 表的更新操作产生新的cdc，进行自动补录三天数据
（命令：Update zjysb012 set softbbh=' ' where rq>'2016-8-22' and rq<'2016-8-25 18:00'）
2016-8-24 HISMZ 性能严重，8月23日早上6点后的数据未到ETLDB
在发布服务器到代理服务器的参数中增加红色部分参数，调用多线程 CPU处理当前作业遇到的问题，2个小时内性能问题得到解决（同时停掉了CDRDB抽取ETLDB的业务）
-Publisher DSCNX -PublisherDB [Hismz] -Publication [Pub_HISMZ] -Distributor [ETLDB] -SubscriptionType 1 -Subscriber [ETLDB] -SubscriberSecurityMode 1 -SubscriberDB [Hismz] -Continuous -SubscriptionStreams 16 -CommitBatchSize 1000 -CommitBatchThreshold 1000
select * from sys.databases where name='hismz'
--log reuse wait replication
sp_readerrorlog
sp_cdc_help_jobs
SELECT s.name AS Schema_Name, tb.name AS Table_Name
, tb.object_id, tb.type, tb.type_desc, tb.is_tracked_by_cdc
FROM sys.tables tb
INNER JOIN sys.schemas s on s.schema_id = tb.schema_id
WHERE tb.is_tracked_by_cdc = 1 and tb.name='zjysb012'
Select * from sys.dm_cdc_log_scan_sessions
select * from sys.sysprocesses where spid = 340
select * from sys.sysprocesses where spid = 359
SELECT * FROM msdb.dbo.cdc_jobs
select db_id('hismz')
use hismz
dbcc opentran
EXECUTE sys.sp_cdc_change_job
@job_type = N'capture',
@maxscans = 10,
@maxtrans = 1000;
GO
/****** Script for SelectTopNRows command from SSMS ******/
SELECT TOP 1000 [start_lsn]
,[tran_begin_time]
,[tran_end_time]
,[tran_id]
,[tran_begin_lsn]
FROM [Hismz].[cdc].[lsn_time_mapping]
order by [tran_begin_time] desc
select * from sys.sysprocesses where spid = 328
use hismz
Select * from sys.dm_cdc_log_scan_sessions
select * from sys.sysprocesses where spid > 50 and dbid = 5 and program_name like '%sqlagent%'
select * from sys.dm_exec_requests where session_id = 153
Declare @cc varchar(max)
select @cc = text from sys.dm_exec_sql_text (0x030005005401BF3C1422FF003BA5000001000000)
select substring (@cc, 78718/2 + 1,125150/2 +1 ),len(@cc)
可查询日志中执行的具体脚本。
sp_repltrans
--zjysb012ls
EXEC sys.sp_cdc_disable_table
@source_schema = N'dbo',
@source_name = N'zjysb012ls',
@capture_instance = N'dbo_zjysb012ls'
GO
EXEC sys.sp_cdc_disable_table
@source_schema = N'dbo',
@source_name = N'zjysb012',
@capture_instance = N'dbo_zjysb012'
GO
/****** Script for SelectTopNRows command from SSMS ******/
SELECT TOP 1000 [start_lsn]
,[tran_begin_time]
,[tran_end_time]
,[tran_id]
,[tran_begin_lsn]
FROM [Hismz].[cdc].[lsn_time_mapping]
order by [tran_begin_time] desc
select * from sys.sysprocesses where spid = 328
use hismz
Select * from sys.dm_cdc_log_scan_sessions
select * from sys.sysprocesses where spid > 50 and dbid = 5 and program_name like '%sqlagent%'
select * from sys.dm_exec_requests where session_id = 153
Declare @cc varchar(max)
select @cc = text from sys.dm_exec_sql_text (0x030005005401BF3C1422FF003BA5000001000000)
select substring (@cc, 78718/2 + 1,125150/2 +1 ),len(@cc)
sp_repltrans
--zjysb012ls
EXEC sys.sp_cdc_disable_table
@source_schema = N'dbo',
@source_name = N'zjysb012ls',
@capture_instance = N'dbo_zjysb012ls'
GO
EXEC sys.sp_cdc_disable_table
@source_schema = N'dbo',
@source_name = N'zjysb012',
@capture_instance = N'dbo_zjysb012'
GO
EXEC sys.sp_cdc_enable_table
@source_schema= 'dbo' --架构名
,@source_name = 'zjysb012' --启用CDC的表名
,@role_name = NULL --必须字段,默认值
,@supports_net_changes = 1 --启用净变更
,@index_name = N'pk_ZJYSB012_IDKEYGUID'--主键名[]
GO