MANAGING ‘NOISY NEIGHBORS’ IN SQL SERVER If you’ve been managing databases for any length of time, you’ve probably had to contend with the “noisy neighbors” scenario. In this scenario,...
2017-02-10
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With SQL Server AlwaysOn Availability Groups, when you configure a secondary in synchronous-commit mode for read-only access, there can be data access latency. If you make changes to your...
2016-05-15
1 reads
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
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
15 reads
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
5 reads
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
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
5 reads
SQL Server configuration parameter “optimized for ad hoc workloads” can be very useful when you execute lots of single use ad hoc statements or dynamic SQL statements by reducing...
2016-05-15
3 reads
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
2 reads
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
2 reads
(Be sure to checkout the FREE SQLpassion Performance Tuning Training Plan - you get...
Hey, it’s T-SQL Tuesday again! I almost forgot about it what with Summit and...
By Bert Wagner
This week, I filmed my experience as a first time speaker at PASS Summit...
I have the following scenario. Server A has transactional replication setup to a subscriber...
Can this be done without dropping connections to the database? (1) Remove prod database...
I have configured always on and log backup is failing with the error Command:...
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