Improvements of RedHat Enterprise Linux

Author: Fenng | can be reproduced, but the original source and author information and copyright statement URL must be indicated in hyperlink form: http://www.dbanotes.net/opensource/red_hat_linux_5.5.htmlredhatofficially published the Enterprise Edition linux5.5.pdf. I thought the release of this version would not have too much fresh content. After reading ReleaseNotes, there are still a lot worth noting. Note that one of them is

Author: Fenng | reprinted, but the original source and author information and copyright statement of the article must be indicated in hyperlink form
URL:Http://www.dbanotes.net/opensource/red_hat_linux_5.5.html

Red Hat officially released the Enterprise Edition Linux 5.5. I thought the Release of this version would not have too much fresh content. After reading the Release Notes, there are still a lot worth noting.

Note that one sentence requires at least 1 GB of memory for each logical CPU. Why?

This version has improved the use of HugePages in a virtualized environment. After HugePages is set, Libvirt (Virtual API) automatically uses HugePages for Virtual Guest Memory. Technical personnel need to consider the impact on the database in the virtualization environment?

This improves the performance of the Completely Fair Queuing (CFQ) I/O scheduler in some application scenarios. Many Linux users do not pay much attention to the default scheduler. In fact, there will be a big difference in performance. Know why.

Introducing SystemTap and Valgrind is good news for system administrators. The former facilitates Performance investigation, and the latter facilitates Memory Leak analysis.

Reading Release Notes is a very interesting thing. A technician can pay more attention to the features of similar products in the fields he is interested in. With their strengths, he should take an active attitude towards technology selection.