DynamicCRM清理PrincipalObjectAccess表，清理POA，清理WorkFlowLog

在CRM2011长时间运行后，发现PrincipalObjectAccess表、AsyncOperationBase表、WorkflowLogBase表产生了上千万条的数据，导致系统运行缓慢。

经过查找处理办法，积累了下面的经验：

详细请见博客http://blogs.msdn.com/b/ritesh_ranjan/archive/2015/02/09/another-experience-with-cleaning-up-the-principalobjectaccess-table-dialogs.aspx

微软官方给出的清理办法：https://support.microsoft.com/en-gb/kb/968520

IF EXISTS (SELECT name from sys.indexes
                  WHERE name = N'CRM_AsyncOperation_CleanupCompleted')
      DROP Index AsyncOperationBase.CRM_AsyncOperation_CleanupCompleted
GO
CREATE NONCLUSTERED INDEX CRM_AsyncOperation_CleanupCompleted
ON [dbo].[AsyncOperationBase] ([StatusCode],[StateCode],[OperationType])
GO

while(1=1)
begin
 declare @DeleteRowCount int = 10000
 declare @rowsAffected int
 declare @DeletedAsyncRowsTable table (AsyncOperationId uniqueidentifier not null primary key)
 insert into @DeletedAsyncRowsTable(AsyncOperationId)
 Select top (@DeleteRowCount) AsyncOperationId from AsyncOperationBase
 where 
  OperationType in (1, 9, 12, 25, 27, 10) 
  AND StateCode = 3 
  AND StatusCode in (30, 32)
 
 select @rowsAffected = @@rowcount 
 delete poa from PrincipalObjectAccess poa 
   join WorkflowLogBase wlb on
    poa.ObjectId = wlb.WorkflowLogId
   join @DeletedAsyncRowsTable dart on
    wlb.AsyncOperationId = dart.AsyncOperationId
 delete WorkflowLogBase from WorkflowLogBase W, @DeletedAsyncRowsTable d
 where 
  W.AsyncOperationId = d.AsyncOperationId             
 delete BulkDeleteFailureBase From BulkDeleteFailureBase B, @DeletedAsyncRowsTable d
 where 
  B.AsyncOperationId = d.AsyncOperationId
 delete WorkflowWaitSubscriptionBase from WorkflowWaitSubscriptionBase WS, @DeletedAsyncRowsTable d
 where 
  WS.AsyncOperationId = d.AsyncOperationID 
 delete AsyncOperationBase From AsyncOperationBase A, @DeletedAsyncRowsTable d
 where 
  A.AsyncOperationId = d.AsyncOperationId
 /*If not calling from a SQL job, use the WAITFOR DELAY*/
 if(@DeleteRowCount > @rowsAffected)
  return
 else
  WAITFOR DELAY '00:00:02.000'
end

OperationType参照表：

系统事件	1
批量电子邮件	2
导入文件分析	3
转换分析数据	4
导入	5
活动传播	6
重复检测规则发布	7
批量重复检测	8
SQM 数据收集	9
工作流	10
快速市场活动	11
匹配代码更新	12
批量删除	13
删除服务	14
索引管理	15
收集组织统计信息	16
导入子进程	17
计算组织的存储规模	18
收集组织的数据库统计信息	19
收集组织规模统计信息	20
数据库优化	21
计算组织的最大存储规模	22
批量删除子进程	23
更新统计信息的间隔	24
组织全文目录索引	25
数据库日志备份	26
更新合同状态	27
DBCC SHRINKDATABASE 维护作业	28
DBCC SHRINKFILE 维护作业	29
对所有索引维护作业重新编制索引	30
存储限制通知	31
清理停用的工作流序集	32
定期系列扩展	33
导入示例数据	34
目标汇总	35
审核分区创建	36
检查语言包更新	37
设置语言包	38
更新组织数据库	39
更新解决方案	40
重新生成实体行计数快照数据	41
重新生成阅读共享快照数据	42
公布到 Yammer	43