SQL Server 2014 SP1 CU7 to current SP/CUįIX: SQL Server database creation on a system with a large volume of memory takes longer than expected. SQL Server 2014 RTM CU14 to current RTM CU. SQL Server 2012 SP3 CU3 to current SP/CU. Creating new databases takes a long time. SQL Server is installed on a machine with large amounts of memory. SQL Server 2014 RTM CU10 to current SP/CUįIX: Out of memory error when the virtual address space of the SQL Server process is low in SQL Server. SQL Server 2012 SP2 CU8 to current SP/CU. There is low available virtual address space for the SQL Server process. Queries encounter SOS_MEMORY_TOPLEVELBLOCKALLOCATOR and CMEMTHREAD waits. You experience slow performance using query operations with spatial data types. You are troubleshooting specific query performance issues Optimizer fixes are disabled by default. SQL Server 2014 SP2 to current SP/CUSQL. A faster CHECKDB in SQL Server (Part IV)Įxecuting concurrent data warehouse queries that take long compile-time results in RESOURCE_SEMAPHORE_QUERY_COMPILE waits.Ĭumulative update package 6 for SQL Server 2014 to SP1. See T2566 details in DBCC TRACEON - Trace Flags (Transact-SQL). Cannot execute multiple statistics update jobs in parallel.īoosting Update Statistics performance with SQL 2014 & SQL 2016ĬHECKDB command takes a long time for large databases. Statistics jobs take a long time to complete. High CPU consumption due to frequent recompiles of queriesĮxisting statistics are not frequently updated because of the large number of rows in the table. Entries in the plan cache are evicted because of growth in other caches or memory clerks. See Cache Size Management section of Plan Cache Internals. Documentation of DBCC TRACEON - Trace Flags (Transact-SQL). SQL Server 2014 RTM CU6 to current SP/CU. SQL Server 2012 SP1 CU14 to current SP/CU. Heavy SOS_CACHESTORE spinlock contention or your plans are being evicted frequently on ad hoc query workloads. Recommendations to reduce allocation contention in SQL Server tempdb database Because of heavy activity, tempdb files encounter growth and not all files grow at the same time and cause allocation contention. The data files at first are set to the same size. You notice user requests waiting for tempdb page resources because of allocation contention.Ĭoncurrency enhancements for the tempdb database NOTE Enable the trace flag and add multiple data files for the tempdb database. Your application workload involves frequent tempdb usage (creation and drop of temp tables or table variables). Your instance of SQL Server is handling thousands of connection resets because of connection pooling.Ĭumulative update package 9 for SQL Server 2012 Service Pack 1 to SP2 Cumulative Update 1 for SQL Server 2014 SQL Server 2012 SP3 to current SP/CUSQLįIX: High "log write waits" counter value on a SQL Server 2012 or SQL Server 2014 instance. SQL Server is installed on systems with multiple sockets.Ĭumulative update package 3 for SQL Server 2012 Service Pack 1 to SP2 SQL Server 2014 RTM. You are using features that rely on log pool cache. SQL Server 2014 Service Pack 2 is now Available !!!. SQL Server 2012 RTM to current Service Pack (SP)/CU. SQL Server is installed on systems with 8 or more cores per socket. Knowledge Base article/Blog link that provides more details When you enable fixes with trace flags in Always On environments, please be aware that you have to enable the fix and trace flags on all the replicas that are part of the Availability Group. 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. 
SQL Server support team has used these updates and configuration changes to achieve reasonable performance gains for customer workloads that used hardware systems that had several NUMA nodes and lots of processors. The degree of improvement that you see will depend on various factors that include workload pattern, contention points, processor layout (number of processor groups, sockets, NUMA nodes, cores in a NUMA node) and amount of memory present in the system. You can consider applying these updates in order to improve the performance of the instance of SQL Server. This article describes the performance improvements and changes that are available for SQL Server 2014 and SQL Server 2012 versions through various product updates and configuration options. Original product version: SQL Server 2014, SQL Server 2012 Original KB number: 2964518 Apply the recommended updates and improve the performance of SQL Server 2014 and SQL Server 2012 This article includes a list of performance improvements and configuration options that are available for SQL Server 2012 and later versions.
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