Hyper-threading technology slows down the server

Intel's HT ( hyperthreading ) technology, launched with the aim of improving processing equipment capabilities, is being criticized by some technologists for causing problems during server operation.

When simultaneously installing SQL Server and Citrix Terminal Server, the motherboard uses Intel's Hyper-Threading technology to perform significantly degradation, especially if the volume of data must be handled greatly. Removing HT, the server will restore the original ability.

" Our customers are constantly complaining about how slow it is to expect when running Citrix Terminal Server and our software on the same system, " said Peter Ibbotson, Technical Manager of Lakeview Computers. , specializing in providing accounting software in the UK, said. " When installing HT technology testing, we found that the motherboards were starting to have problems. Turn off hyper-threading, the process returned to normal ."

Recently, Slave Ocks, a Microsoft Server 2005 developer, also reported the same error on the blog. " Our customers have observed very noticeable manifestations in high-end HT hardware. In some cases, when the amount of data entered into SQL Server is large, CPUs operate significantly faster but SQL Server is down, "Ocks wrote. " Many threads approach different parts of memory but are processed synchronously by HT, the common cache will not be able to keep up with the sequence of sequences, so the ability to operate is in trouble ."

Hyperthreading method allows multiple components in a processing device to run with different code at the same time. Intel claims this technology will boost the chip's execution speed and allow the CPU to process almost twice the amount of information compared to non-HT applications.

" In fact, I have never witnessed any improvements on SQL Server software whenever I activate HT. Customers should uninstall HT if they want to run Citrix and our software on the same machine ," Ocks recommendation.

Intel representatives did not comment on this issue.

TN