diy-computing.com

Multi-user-multi-processing-systems

Sat, 17 Mar 2012 02:22:58 +0000

What is a process?

Each process provides the resources needed to execute a program.

So, a process has a

virtual address space,
executable code,
open handles to system objects,
a security context,
a unique process identifier,
environment variables,
a priority class,
minimum and maximum working set sizes,
at least one thread of execution.

Each process is started with a single thread, often called the primary thread, but can create additional threads from any of its threads.

What is a Thread?
A thread is the entity within a process that can be scheduled for execution. All threads of a process share its virtual address space and system resources. In addition, each thread maintains exception handlers, a scheduling priority, thread local storage, a unique thread identifier, and a set of structures the system will use to save the thread context until it is scheduled. The thread context includes the thread’s set of machine registers, the kernel stack, a thread environment block, and a user stack in the address space of the thread’s process. Threads can also have their own security context, which can be used for impersonating clientsApache : Should I use Multi-processed (Prefork) or Multi-Threaded (Worker) apache ?

There is no simple answer, it depends on what traffic your site takes. In theory remember, creating/removing a process is costly. Threads are lightweight, but again if you spawn a huge number of threads you will likely start running out of virtual memory. For this reason Apache has a limit to the number of threads a process can spawn (default is somewhere around 50).

I’ve come across multi-processed instances taking a pretty good amount of traffic without a problem.

Linux Beginners Tutorials

Sun, 22 May 2011 11:15:09 +0000

Linux Beginners Tutorials , Linux beginners guides to help you learn how to use Linux both as a server operating system, and to get the best from the Linux desktop.

Joomla Beginners Tutorials

Sun, 22 May 2011 11:20:01 +0000

Joomla Beginners Tutorials focusses on learning Joomla! to design and create effective CMS websites.

The growing set of tutorials and tips here will help you learn Joomla!, both the front-end and back-end functionality, so that you can maintain a

Working with Linux

Sun, 22 May 2011 06:58:18 +0000

Linux Beginners Tutorials

Linux – multi-processing, multi-user operating system

Privacy Policy

Sun, 22 May 2011 06:36:41 +0000

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Last updated Sun, 22 May 2011 06:36

Linux Beginners Tutorials

Sat, 14 May 2011 21:32:21 +0000

Linux Beginners Tutorials – an important new section of this website, helping new Linux users get the best from their Linux installations.

about-diy-computing.com

Sat, 14 May 2011 20:07:09 +0000

Welcome to diy-computing.com

You will find a growing knowledge base with guides, tutorials and tips to help you learn more about a range of software, hardware, operating system and networking technology.

Our aim is to help you develop knowledge and skills in Information and Communication Technology(ICT), with the view to becoming confident and self-sufficient; either to allow you to configure, manage and use your own systems well, or to be comfortable when seeking computing assistance from ICT professionals.