For tables with lots of rows, it's clear that the temporary table and constructed SQL query approaches are superior. It's odd to me that the table variable doesn't perform better. When I look at the actual query
NODE_CACHE_MUTEX 僅限內部使用。 OLEDB 當SQL Server 呼叫 SNAC OLE DB 提供者 (SQLNCLI) 或 Microsoft OLE DB Driver for SQL Server (MSOLEDBSQL) 時發生。 此等候類型不會用於同步處理。 相反地,它會指出對 OLE DB 提供者的呼叫持續時間。 ONDEMAN...
In order to get a query plan as if we have 128 CPUs we must first execute the DBCC OPTIMIZER_WHATIF command setting the number of CPUs to 128. For those of you who don’t know, the first and second DBCC commands below are to clean the plan cache and the buffer pool. USE TestDB ...
January 29, 2019 Could not clear 'DIFFERENTIAL' bitmap in database - Error: 3041, Severity: 16, State: 1. January 23, 2019 Scripting variable not defined error during batch job January 10, 2019 Service Broker - When to use for synchronizing databases January 04, 2019 How to capture errors...
Committed_kb: The amount of memory currently allocated by the buffer cache for use by database pages. Committed_target_kb: This is the amount of memory the buffer cache “wants” to use. If the amount currently in use (indicated by committed_kb) is higher than this amount, then the buff...
SQL Server: Optimizing SQL Server CPU Performance From the Editor: The Best is Yet To Come Toolbox: New Products for IT Pros SQL Q&A: Login Triggers, Data File Defrags, and More Utility Spotlight: Virtual Machine Remote Control Plus
aws_ec2_ami_boot.sh - boots a personal EC2 instance of a given AMI for testing aws_ec2_ami_boot_ssh.sh - boots a personal EC2 instance of a given AMI, determines the public or private IP, and drops you into an SSH shell aws_ec2_ami_create_from_instance.sh - creates an AWS EC2 ...
DB_nK_CACHE_SIZE = integer [K | M | G] Default value 0M (additional block size caches are not configured by default) Parameter class Dynamic: ALTER SYSTEM Range of values n = 2, 4, 8, 16, 32 DB_nK_CACHE_SIZE specifies the size of the cache for the nK buffers. You ...
Performance Tuning Guide • Oracle Database Net Services Administrator's Guide • Pro*COBOL Programmer's Guide • Pro*C/C++ Programmer's Guide • Oracle Database installation and user's manuals for your operating system Many of the examples in this book use the sample schemas, which you...
查询变体计划放置在计划缓存对象存储 (CACHESTORE_OBJCP) 中,而调度程序计划放置在 SQL 计划缓存存储 (CACHESTORE_SQLCP) 中。 但是,PSP 功能会将查询变体父查询的object_id存储在 ObjectID 属性中,该属性是 PLAN PER VALUE 提示的一部分,如果父查询是模块的一部分并且不是动态或临时的 T-SQL,PSP 会添加到 ...