Filtered Statistics in SQL Server
In SQL Server, Filtered Statistics can improve cardinality estimation, i.e. when joining lookup table, or while joining fact table and dimension table. For this reason, SQL Server supports the...
2016-05-15
7 reads
Ramesh Meyyappan’s SQL Server Performance Tuning Blog
Parallel Insert Into – Table Variable Vs Temporary Table in SQL Server
In SQL Server, for insert into select statements, when the target for insert into is temporary table, the select statement can execute in parallel. When the target is table...
2016-05-15
14 reads
Cardinality Estimation – Table Variable Vs Temporary Table in SQL Serve
SQL Server creates and maintains statistics for temporary tables, which lead to better cardinality estimation and optimal execution plan generation. Table variables have no statistics, which can result in...
2016-05-15
9 reads
Understanding ASYNC_NETWORK_IO Waits in SQL Server
In SQL Server, ASYNC_NETWORK_IO wait time can be high due to slow network, like when the database is in the cloud and the application is on premise. Furthermore, it...
2016-05-15
21 reads
Resource Governor in SQL Server – Workload Throttling
Resource Governor in SQL Server provides CPU, Memory and I/O throttling. In SQL Server 2014 and earlier, CPU throttling works only for similar kind of workloads and not for...
2016-05-14
8 reads
Data Compression in SQL Server – Pros and Cons
SQL Server supports row and page compression on tables, indexes and partitions. This can lead to reduced I/O and better performance. However, it can also result in additional CPU...
2016-05-10
10 reads
SQL Server Command Timeout – Application Timeout – Attention
When you use ODBC or SqlClient to access data from SQL Server, by default the query will be cancelled if there is no response from the server within a...
2016-05-09
25 reads
Slow performance due to SQL Server 2014 Buffer Pool Extension (BPE) and serial queries (MAXDOP 1)
The SQL Server 2014 Buffer Pool Extension feature can extend the buffer pool space on to Solid State Drive (SSD), where data and index pages can be cached. There...
2014-12-04
21 reads
NUMA remote (foreign) memory access overhead on Windows, SQL Server and In-Memory OLTP
In NUMA (Non-Uniform Memory Access), processors in the same physical location are grouped in a node which has its own local node memory. In a NUMA based system, there...
2014-12-04
36 reads
SQL Server 2012: Indirect Checkpoint (Target Recovery Time), get the real scoop
SQL Server 2012 brings a new feature called Indirect Checkpoint. You can read more about it here: http://msdn.microsoft.com/en-us/library/ms189573.aspx. With Indirect Checkpoint, you get smaller and too many I/Os Checkpoint...
2013-03-19
13 reads
Blogs
App-Consistent MongoDB Snapshots Across Multiple Pure Storage FlashArrays
Introduction When you’re running MongoDB at scale with data distributed across multiple Pure Storage...
PASS: Quantum Computing Slides
By Brian Kelley
If you're an attendee at the PASS Data Community Summit this year, there are...
A New Word: Dead Reckoning
By Steve Jones
dead reckoning– v. intr. finding yourself bothered by somebody’s death more than you would...
Forums
Looking for help with SQL statement
Hi there I am seeking some help with an SQL statement. Any help would...
Personal Contact Is Vital
Comments posted to this topic are about the item Personal Contact Is Vital
Getting the Schema for Tables
Comments posted to this topic are about the item Getting the Schema for Tables
Question of the Day
Getting the Schema for Tables
What happens when I run this on SQL Server 2022 in the AdventureWorks2022 database?
SELECT OBJECT_DEFINITION (OBJECT_ID(N'Person.Person')) AS [Object Definition]; GOSee possible answers