Extended Event Locks Lock Waits in SQL Server
When it comes to lock waits, one of the important information we need to know is which statement waited for locks and how long. This is possible with extended...
2016-05-15
137 reads
Extended Event Query Post Execution Showplan in SQL Server
Query Post Execution Showplan event is a very useful event to find problematic queries and execution plans based on CPU usage or duration while analyzing performance issues. It can...
2016-05-15
68 reads
PAGELATCH Waits with Update Statements in SQL Server – PAGELATCH_EX and PAGELATCH_SH
In SQL Server, concurrent writes or read / write to the same page can lead to PAGELATCH (like PAGELATCH_EX and PAGELATCH_SH) waits or what is knowns as PAGELATCH contention....
2016-05-15
58 reads
Tempdb Allocation Contention in SQL Server
In SQL Server, the concurrent creation of temporary objects (temporary tables and table variables) from many sessions can lead to tempdb allocation contention. This contention occurs on PFS and...
2016-05-15
38 reads
In-Memory OLTP Memory Optimized Table Variables Vs Disk Based Table Variable in SQL Server
Starting SQL Server 2014, it is possible to use memory optimized table variables. These are table variables declared using a table type which is memory optimized. Memory optimized table...
2016-05-15
39 reads
Temp Table Caching in SQL Server
SQL Server caches temporary objects (temporary tables and table variables), that are created in a stored procedure. Temporary objects that are created either in dynamic SQL statement or by...
2016-05-15
87 reads
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
19 reads
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
25 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
23 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
33 reads
Blogs
The Book of Redgate:A Prehistory
By Steve Jones
I’ve covered the values in a number of previous posts on the Book of...
Evidence-bound: what AgentDBA will and won’t link
By Arun Sirpal
When the evidence names the database, it says so. When it doesn’t, it stops....
Prep data for AI vs. Fabric Data Agent Instructions: What Goes Where?
By James Serra
Making Data AI-Ready, Part 3 (This is the final article in a three-part series...
Forums
Four Rules for Adding AI Without Breaking What Already Works
Comments posted to this topic are about the item Four Rules for Adding AI...
SQL Server 2025 section missing?
Hello, the title says it all. Is the SQL Server 2025 section missing?
A design question in a parent child relationship
I am not sure which is the best way to proceed. I have parent...
Question of the Day
Hyperscale Replicas III
In an Azure SQL Database Hyperscale Edition, how many named replicas can be configured?
See possible answers