KB3216543 - FIX: Workloads that utilize many frequent, short transactions in SQL Server 20 may consume more CPU than in SQL Server 2014 SQL Server 2016 SP1 CU2 to SQL Server 2016 SP2 CU2 Indirect Checkpoint and tempdb - the good, the bad and the non-yielding scheduler KB4040276 - FIX: Indirect checkpoints on tempdb database cause "Non-yielding scheduler" error in SQL Server 20įrequent short transactions happen in tempdbYou notice increased CPU usage for these transactions Common Criteria Compliance is not enabled SQL Server 2016 SP1 CU5 to current SP/CU SQL Server 2017 CU1 to current SP/CU Tempdb is heavily used and has many modifications to the data in tempdb You encounter non-yielding scheduler messages when using Indirect Checkpoint for tempdb database KB3026083 - FIX: SOS_CACHESTORE spinlock contention on ad hoc SQL Server plan cache causes high CPU usage in SQL ServerĮntries in the plan cache are evicted because of growth in other caches or memory clerks High CPU consumption because of frequent recompiles of queriesĭocumentation of DBCC TRACEON - Trace Flags (Transact-SQL) See Cache Size Management section of Plan Cache Internals SQL Server 2016 RTM to current SP/CU SQL Server 2017 RTM to current SP/CU Heavy SOS_CACHESTORE spinlock contention or your plans are being evicted frequently on ad hoc query workloads. Knowledge Base article or blog link for more details When you enable fixes that have trace flags in Always On environments, be aware that you have to enable the fix and trace flags on all the replicas that are part of the Availability Group. Table 5 contains recommended fixes and configuration guidelines for SQL Server instances deployed in a Linux environment.
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Table 2 contains recommendations and guidance for additional performance tuning.Table 1 contains the most frequently recommended updates and trace flags for scalability on high-end systems.These recommendations for improving the performance of SQL Server 2017 and SQL Server 2016 are grouped into five tables, as follows: Apply recommended updates and improve SQL Server performance The support team will continue to update this article with other updates in the future.Ī "high-end system" typically has multiple sockets, eight cores or more per socket, and a half terabyte or more of memory. The SQL Server support team has used these updates and configuration changes to achieve reasonable performance gains for customer workloads that use hardware systems that included several NUMA nodes and lots of processors. The degree of improvement will depend on various factors, including workload pattern, contention points, processor layout (number of processor groups, sockets, NUMA nodes, and cores in a NUMA node), and the amount of available memory in the system. We recommend that you consider applying these updates to improve the performance of SQL Server instances. This article describes the performance improvements and changes that are available for Microsoft SQL Server 2017 and SQL Server 2016 through various product updates and configuration options. Original product version: SQL Server 2017 on Windows, SQL Server 2016 Original KB number: 4465518 Introduction This article describes a list of performance improvements and configuration options that are available for SQL Server 2016 and later versions. Recommended updates and configuration options for SQL Server 20 with high-performance workloads
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