Hyperthreading vs. SQL Server & PostgreSQL

Posted by IanC on Server Fault See other posts from Server Fault or by IanC
Published on 2011-01-07T11:16:29Z Indexed on 2011/01/07 11:55 UTC
Read the original article Hit count: 397

Filed under:

sql-server

|

Performance

|

postgresql

|

cpu-architecture

|

hyperthreading

I have read that hyperthreading is a "performance killer" when it comes to DBs. However, what I read didn't state which CPUs. Further, it mostly indicated that I/O was "cut to < 10% performance".

That logically doesn't make sense since I/O is primarily a function of controllers and disks, not CPUs. But then no one ever said bugs made sense.

What I read also stated that SQL Server could put two parallel query ops onto 1 logical core (2 threads), thereby degrading performance. I have a hard time believing SQL Server's architects would have made such an obvious miscalculation.

Does anyone have and data on how hyperthreading on current generation CPUs affects either of the RDBMSs I mentioned?

© Server Fault or respective owner

Related posts about sql-server

SQL SERVER – Beginning SQL Server: One Step at a Time – SQL Server Magazine

as seen on SQL Authority - Search for 'SQL Authority'
I am glad to announce that along with SQLAuthority.com, I will be blogging on the prominent site of SQL Server Magazine. My very first blog post there is already live; read here: Beginning SQL Server: One Step at a Time. My association with SQL Server Magazine has been quite long, I have written nearly… >>> More
How to install SQL Server 2005 Configuration Manager without installing SQL Server Management Studio

as seen on Server Fault - Search for 'Server Fault'
Hi, I need to configure SQL Server aliases on a public-facing production server. To do that, I need to install SQL Server Configuration Manager. I was not able to find a standalone installer for that, so I am having to install SQL Server 2005 Client Components. This approach is not ideal as we don't… >>> More
[MAJ] SQL Server 2005 Express Edition - La version gratuite de SQL Server 2005

as seen on ASP-PHP.net - Search for 'ASP-PHP.net'
Modification technique pour le site de l'article. >>> More
How to create SQL Server Express DB from SQL Server DB

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a SQL Server 2008 DB. I want to extract SOME tables (and associated schema, constraints, indexes, etc) and create a SQL Server Express DB. It isn't a sync of the target, we stomp on it. We ONLY need to do this in the file system (not across the wire). We are not fond of the synchronization… >>> More
sql server 2000 error, error trying to connect to sql server 2005

as seen on Stack Overflow - Search for 'Stack Overflow'
i am connecting to sql server 2000 on a remote computer with a dotnet application, but when i try to open the connection it gives the following error: When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections What… >>> More

Related posts about Performance

Improving VPN performance - stronger encryption = more performance?

as seen on Server Fault - Search for 'Server Fault'
I have a site-to-site VPN set up with two SonicWall's (a TZ170 and a Pro1260). It was suggested to me that turning off encryption (so the VPN is tunneling only) would improve performance. (I'm not concerned with security, because the VPN is running over a trusted line.) Using FTP and HTTP transfers… >>> More
Inaccurate performance counter timer values in Windows Performance Monitor

as seen on Stack Overflow - Search for 'Stack Overflow'
I am implementing instrumentation within an application and have encountered an issue where the value that is displayed in Windows Performance Monitor from a PerformanceCounter is incongruent with the value that is recorded. I am using a Stopwatch to record the duration of a method execution, then… >>> More
Excel-based Performance Reviews transformed into Web Application for Performance Management

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
HR TMS provides enterprise talent management solutions for healthcare, retail and corporate customers, focusing on performance management, compensation management and succession planning. As the competency of nurses and other healthcare workers is critical, the government, via the Joint Commission… >>> More
How to save a perfmon Performance Counter as a textfile (Reliability and Performance Monitor Version

as seen on Server Fault - Search for 'Server Fault'
Now the file gets saved as blg, but I would like a txt versin to import in Excel. >>> More
SQLAuthority News – A Successful Performance Tuning Seminar at Pune – Dec 4-5, 2010

as seen on SQL Authority - Search for 'SQL Authority'
This is report to my third of very successful seminar event on SQL Server Performance Tuning. SQL Server Performance Tuning Seminar in Colombo was oversubscribed with total of 35 attendees. You can read the details over here SQLAuthority News – SQL Server Performance Optimizations Seminar – Grand… >>> More