TokenAndPermUserStore Clear 会在短时间内降低 CPU 使用率
Ran*_*gen 8 sql-server sql-server-2014
介绍
简而言之，我的服务器上发生了很多临时查询，来自我无法控制且无法更改的应用程序（即使推送索引也很困难，而且它们使用了很多堆......）。
眼镜
操作系统 - Windows Server 2012 R2（主节点）SQL Server 2014 - 12.0.5546
Always On AG 与具有相同硬件的辅助同步节点 + Build。
由于许可，我们只能将 24 个内核中的 12 个用于 sql server（我没有这样做）。很容易发现哪个 12 个内核；)。
问题
现在关于我的问题。目前，我们每 30 分钟清除一次“TokenAndPermUserStore”。这甚至在它到达我手中之前就在服务器上发生了。我们使用以下命令执行此操作：
DBCC FREESYSTEMCACHE ('TokenAndPermUserStore')
我使用这个查询来检查缓存：
SELECT SUM(pages_kb) / 1024 AS
"CurrentSizeOfTokenCache(mb)"
FROM sys.dm_os_memory_clerks
WHERE name = 'TokenAndPermUserStore'
在清除之后，这是缓存大小：
CurrentSizeOfTokenCache(mb)
1602
在某个时间点，例如清除后 15 分钟，这是缓存大小：
CurrentSizeOfTokenCache(mb)
1976
更新： 现在，当 CPU 使用率再次稳定时（使用 40%（监控时为 20%），缓存远低于 CPU 使用率高时的最低点。
CurrentSizeOfTokenCache(mb)
1281
昨天的例子：
昨天的这张照片上的下降非常明显：（注意因为我们可以使用 24 个内核中的 12 个，50% 意味着在监控软件中 100%，换句话说，cpu 使用率可能不会超过 50%，因为它专用于仅限 sql 服务器）
需要注意的一件重要事情是，昨天我们在 top 查询上添加了两个重要索引，因为 CPU 几乎持平，这在短时间内有所帮助，但 cpu 再次上升到同一水平，没有明显的查询应该受到打击我们的系统这么难。
问题
现在，对于我的问题，今天，我尝试通过执行更频繁地清除缓存
DBCC FREESYSTEMCACHE ('TokenAndPermUserStore')
手动几次。但似乎在大约 20 秒后，cpu 使用率又回来了。
执行命令后，您可以清楚地看到三个下降，但在下图中它恢复得相当快。
我应该更多地安排命令，我应该查看其他更改吗？
我知道这个问题在 SQL Server 2005 中很普遍，但这是 SQL Server 2014。查询是 sp_executesql 类型的查询。
如果您需要更多信息或说明，请随时告诉我。
2018 年 5 月 12 日更新
查询计划：https : //www.brentozar.com/pastetheplan/?id=BkUKKVByV
--> 粘贴计划是为找到的三个计划创建相同的链接。我尝试为同一查询添加在缓存中找到的所有三个 XML 计划，每个计划执行 10 次，并为每个计划获得相同的链接。
使用的查询
SELECT
text, execution_count,
dm_exec_query_stats.creation_time, dm_exec_query_plan.query_plan
FROM sys.dm_exec_query_stats
CROSS APPLY sys.dm_exec_sql_text(dm_exec_query_stats.plan_handle)
CROSS APPLY sys.dm_exec_query_plan(plan_handle)
三个相同查询的结果：
我确实要注意，查询正在使用 SNAPSHOT ISOLATION ，通过在执行查询之前设置它，并使用提示 OPTION (KEEP PLAN, KEEPFIXED PLAN, LOOP JOIN)
查询 1
(@SV1 nvarchar(8),@SV2 nvarchar(8),@SV3 nvarchar(8),@SV4 nvarchar(8),@SV5 nvarchar(8),@SV6 nvarchar(8),@SV7 nvarchar(8),@SV8 nvarchar(8),@SV9 nvarchar(8),@SV10 nvarchar(8),@SV11 nvarchar(8),@SV12 nvarchar(8),@SV13 nvarchar(8),@SV14 nvarchar(8),@SV15 nvarchar(8),@SV16 nvarchar(8),@SV17 nvarchar(8),@SV18 nvarchar(8),@SV19 nvarchar(8)) IF @@TRANCOUNT = 0 SET TRANSACTION ISOLATION LEVEL SNAPSHOT SELECT AA.[SourceCode],AA.[DOUBLEMEDICATIONSVALIDATED],AA.[BSTNUM],AA.[MUTKOD],AA.[VERVALLEN],AA.[BACKUPID],AA.[LAATSTE],AA.[ExterneCode],AA.[PRKODE],AA.[NMMEMO],AA.[NMETIK],AA.[NMNM40],AA.[NMNAAM],AA.[PRNMNR],AA.[PRKBST],AA.[GPKODE],AA.[DRMLGEN],AA.[Anticoagulant],AA.[HPKSubstancesDiff],AA.[HPKCIsDiff],AA.[HPKUndesiredGroupsDiff] FROM [dbo].[ZINDEX_050] AA WHERE EXISTS (SELECT NULL FROM (SELECT TOP 100 PERCENT A.[BSTNUM],A.[MUTKOD],A.[VERVALLEN],A.[BACKUPID],A.[DMPRKA],A.[DMPRKB],A.[DMCODE],A.[DMGRDCODE] FROM [dbo].[ZINDEX_671] A WHERE ((A.[VERVALLEN] = 0 OR A.[VERVALLEN] IS NULL) AND ((A.[DMPRKA] = @SV1 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV4) OR (A.[DMPRKA] = @SV5 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV6 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV7) OR (A.[DMPRKA] = @SV8 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV9 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV10) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV11) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV12) OR (A.[DMPRKA] = @SV13 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV14) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV15) OR (A.[DMPRKA] = @SV16 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV17 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV18 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV19))) ) A WHERE AA.[PRKODE] = A.[DMPRKA]) OPTION (KEEP PLAN, KEEPFIXED PLAN, LOOP JOIN) SELECT AB.[SourceCode],AB.[DOUBLEMEDICATIONSVALIDATED],AB.[BSTNUM],AB.[MUTKOD],AB.[VERVALLEN],AB.[BACKUPID],AB.[LAATSTE],AB.[ExterneCode],AB.[PRKODE],AB.[NMMEMO],AB.[NMETIK],AB.[NMNM40],AB.[NMNAAM],AB.[PRNMNR],AB.[PRKBST],AB.[GPKODE],AB.[DRMLGEN],AB.[Anticoagulant],AB.[HPKSubstancesDiff],AB.[HPKCIsDiff],AB.[HPKUndesiredGroupsDiff] FROM [dbo].[ZINDEX_050] AB WHERE EXISTS (SELECT NULL FROM (SELECT TOP 100 PERCENT A.[BSTNUM],A.[MUTKOD],A.[VERVALLEN],A.[BACKUPID],A.[DMPRKA],A.[DMPRKB],A.[DMCODE],A.[DMGRDCODE] FROM [dbo].[ZINDEX_671] A WHERE ((A.[VERVALLEN] = 0 OR A.[VERVALLEN] IS NULL) AND ((A.[DMPRKA] = @SV1 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV4) OR (A.[DMPRKA] = @SV5 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV6 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV7) OR (A.[DMPRKA] = @SV8 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV9 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV10) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV11) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV12) OR (A.[DMPRKA] = @SV13 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV14) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV15) OR (A.[DMPRKA] = @SV16 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV17 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV18 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV19))) ) A WHERE AB.[PRKODE] = A.[DMPRKB]) OPTION (KEEP PLAN, KEEPFIXED PLAN, LOOP JOIN) SELECT A.[BSTNUM],A.[MUTKOD],A.[VERVALLEN],A.[BACKUPID],A.[DMPRKA],A.[DMPRKB],A.[DMCODE],A.[DMGRDCODE] FROM [dbo].[ZINDEX_671] A WHERE ((A.[VERVALLEN] = 0 OR A.[VERVALLEN] IS NULL) AND ((A.[DMPRKA] = @SV1 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV4) OR (A.[DMPRKA] = @SV5 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV6 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV7) OR (A.[DMPRKA] = @SV8 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV9 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV10) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV11) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV12) OR (A.[DMPRKA] = @SV13 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV14) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV15) OR (A.[DMPRKA] = @SV16 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV17 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV18 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV19))) ORDER BY A.[DMPRKA] ASC,A.[DMPRKB] ASC OPTION (KEEP PLAN, KEEPFIXED PLAN, LOOP JOIN)
查询 2
(@SV1 nvarchar(8),@SV2 nvarchar(8),@SV3 nvarchar(8),@SV4 nvarchar(8),@SV5 nvarchar(8),@SV6 nvarchar(8),@SV7 nvarchar(8),@SV8 nvarchar(8),@SV9 nvarchar(8),@SV10 nvarchar(8),@SV11 nvarchar(8),@SV12 nvarchar(8),@SV13 nvarchar(8),@SV14 nvarchar(8),@SV15 nvarchar(8),@SV16 nvarchar(8),@SV17 nvarchar(8),@SV18 nvarchar(8),@SV19 nvarchar(8)) IF @@TRANCOUNT = 0 SET TRANSACTION ISOLATION LEVEL SNAPSHOT SELECT AA.[SourceCode],AA.[DOUBLEMEDICATIONSVALIDATED],AA.[BSTNUM],AA.[MUTKOD],AA.[VERVALLEN],AA.[BACKUPID],AA.[LAATSTE],AA.[ExterneCode],AA.[PRKODE],AA.[NMMEMO],AA.[NMETIK],AA.[NMNM40],AA.[NMNAAM],AA.[PRNMNR],AA.[PRKBST],AA.[GPKODE],AA.[DRMLGEN],AA.[Anticoagulant],AA.[HPKSubstancesDiff],AA.[HPKCIsDiff],AA.[HPKUndesiredGroupsDiff] FROM [dbo].[ZINDEX_050] AA WHERE EXISTS (SELECT NULL FROM (SELECT TOP 100 PERCENT A.[BSTNUM],A.[MUTKOD],A.[VERVALLEN],A.[BACKUPID],A.[DMPRKA],A.[DMPRKB],A.[DMCODE],A.[DMGRDCODE] FROM [dbo].[ZINDEX_671] A WHERE ((A.[VERVALLEN] = 0 OR A.[VERVALLEN] IS NULL) AND ((A.[DMPRKA] = @SV1 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV4) OR (A.[DMPRKA] = @SV5 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV6 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV7) OR (A.[DMPRKA] = @SV8 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV9 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV10) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV11) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV12) OR (A.[DMPRKA] = @SV13 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV14) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV15) OR (A.[DMPRKA] = @SV16 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV17 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV18 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV19))) ) A WHERE AA.[PRKODE] = A.[DMPRKA]) OPTION (KEEP PLAN, KEEPFIXED PLAN, LOOP JOIN) SELECT AB.[SourceCode],AB.[DOUBLEMEDICATIONSVALIDATED],AB.[BSTNUM],AB.[MUTKOD],AB.[VERVALLEN],AB.[BACKUPID],AB.[LAATSTE],AB.[ExterneCode],AB.[PRKODE],AB.[NMMEMO],AB.[NMETIK],AB.[NMNM40],AB.[NMNAAM],AB.[PRNMNR],AB.[PRKBST],AB.[GPKODE],AB.[DRMLGEN],AB.[Anticoagulant],AB.[HPKSubstancesDiff],AB.[HPKCIsDiff],AB.[HPKUndesiredGroupsDiff] FROM [dbo].[ZINDEX_050] AB WHERE EXISTS (SELECT NULL FROM (SELECT TOP 100 PERCENT A.[BSTNUM],A.[MUTKOD],A.[VERVALLEN],A.[BACKUPID],A.[DMPRKA],A.[DMPRKB],A.[DMCODE],A.[DMGRDCODE] FROM [dbo].[ZINDEX_671] A WHERE ((A.[VERVALLEN] = 0 OR A.[VERVALLEN] IS NULL) AND ((A.[DMPRKA] = @SV1 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV4) OR (A.[DMPRKA] = @SV5 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV6 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV7) OR (A.[DMPRKA] = @SV8 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV9 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV10) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV11) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV12) OR (A.[DMPRKA] = @SV13 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV14) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV15) OR (A.[DMPRKA] = @SV16 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV17 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV18 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV19))) ) A WHERE AB.[PRKODE] = A.[DMPRKB]) OPTION (KEEP PLAN, KEEPFIXED PLAN, LOOP JOIN) SELECT A.[BSTNUM],A.[MUTKOD],A.[VERVALLEN],A.[BACKUPID],A.[DMPRKA],A.[DMPRKB],A.[DMCODE],A.[DMGRDCODE] FROM [dbo].[ZINDEX_671] A WHERE ((A.[VERVALLEN] = 0 OR A.[VERVALLEN] IS NULL) AND ((A.[DMPRKA] = @SV1 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV4) OR (A.[DMPRKA] = @SV5 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV6 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV7) OR (A.[DMPRKA] = @SV8 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV9 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV10) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV11) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV12) OR (A.[DMPRKA] = @SV13 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV14) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV15) OR (A.[DMPRKA] = @SV16 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV17 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV18 AND A.[DMPRKB] = @SV2) OR (A.[DMPRKA] = @SV3 AND A.[DMPRKB] = @SV19))) ORDER BY A.[DMPRKA] ASC,A.[DMPRKB] ASC OPTION (KEEP PLAN, KEEPFIXED PLAN, LOOP JOIN)
看着很痛，我知道。
即使使用强制参数化也能编译
编译/秒匹配批次/秒几乎是 1 对 1，即使在启用强制参数化时也是如此。这就是为什么 batches/sec 行被隐藏（它在 compiles/sec 行后面）。
性能统计：
当 cpu 大约为 80% 和大约 40% 时查询、CPU、I/O
在今天下午 1u05 到下午 1u25 的时间范围内执行的查询聚合（80% Cpu 使用率）：
CPU使用率：
与今天的 cpu 使用率较低的 2u05 PM - 2u25PM 时有所不同（40% cpu 使用率）
CPU使用率：
第一个是我们看到问题时添加了索引，并减少了cpu使用率。
带有检查和更多信息的额外查询：
select count(*) as amount_of_USERSTORE_TOKENPERM from sys.dm_os_memory_clerks
where type = 'USERSTORE_TOKENPERM'
amount_of_USERSTORE_TOKENPERM
15190
select count(*) as amount_of_connections from sys.dm_exec_connections
amount_of_connections
10004
select value_in_use from sys.configurations
where name like '%access check cache bucket count%'
value_in_use
0
select value_in_use from sys.configurations
where name like '%access check cache quota%'
value_in_use
0