I have a busy SQL Server and notice that several queries are running in parallel. I know I can set the max degree of parallelism setting, but what MAXDOP should I use? Solution The purpose of this article is to share with the community a discussion I had with a Microsoft PFE (Premier ...
There’s a ton of bad advice on the web that goes a lot further and says you should set MAXDOP to 1 for OLTP-oriented workloads. They’re saying that if your application’s database needs are mostly very small inserts, updates, and deletes, then you should constrain SQL Server to only...
Here are the test results with various combinations of MAXDOP and concurrent requests into temporary tables. The MAXDOP 15 value seems to be the most efficient in this case because that way, each request lines up nicely with the NUMA node boundaries (each NUMA node in the...
Cache Faults/sec are very high, is this an issue and how to fix it? calculate MAXDOP Calculating FileStream Data Size used in SQL Server Calling batch file from sql server job can a query that uses with (nolock) block anything? Can anyone explain how SQL Server performance scales with...
The operation will resume with MAXDOP value %d. 11906 – The operation cannot be completed because a connection to the SBS file could not be made. Please try to run the operation again. If the error persists, please contact support. 12112 – Warning: %ls statement is being forced to r...
See Database Engine Configuration - MaxDOP page and the SQLMAXDOP parameter in Install SQL Server from the Command Prompt. The default value aligns with the max degree of parallelism guidelines in Configure the max degree of parallelism Server Configuration Option. Setup warning on Server/CAL ...
This new aggregate function is designed for data warehouse scenarios, and is an equivalent forCOUNT(DISTINCT()). Instead of performing expensive distinct sort operations to determine actual counts, it relies instead on statistics to get something relatively accurate. You should find that the margin ...
The full article can be found athttp://www.sqlservercentral.com/articles/Advanced+Querying/61716/ The reminder I wanted to point to is this one: http://www.sqlservercentral.com/Forums/FindPost450363.aspx The caveot is partitioning ! (even the maxdop 1 will not save ...
T-SQL offers a high performing language. While I use Entity Framework in many of my custom applications, any time I must use aggregates with a lot of filters, joins, cross-applies, self-joins, or query hints and additions (like MAXDOP), I switch to T-SQL because I can almost alwa...
Cache Faults/sec are very high, is this an issue and how to fix it? calculate MAXDOP Calculating FileStream Data Size used in SQL Server Calling batch file from sql server job can a query that uses with (nolock) block anything? Can anyone explain how SQL Server performance scales with CP...