Training, Open Source computer languages

Search for:
Print friendly page
Home Accessibility Courses Diary The Mouth Forum Resources Site Map About Us Contact
Linux / Unix - process priority and nice

Visit certain theme parks, stand in queues for the rides. OK - that's fair enough at time. But then see folks with "fast pass" special tickets go the front and get, more or less, straight on. You may have seen the scenario ....

But look carefully, and the operators never let the whole of the fast-track bunch through at once. If there's a queue there too, they'll clear it rapidly, but still keep a modicum of flow running from the main lines.		A similar thing happens with Linux / Unix tasks that are awaiting the processor - known as "runnable"s. There's a concept known as "niceness". Default value 0 - standard queue. Positive value - a process that is nice to others and hold back, so lower priority. And a negative value - a process that barges in and gets higher priority treatment.

But there's NOT an absolute rule that runnables are started are run without limit in the order "least nice first" - there has to be some sharing and although the higher priority processes will be kept waiting far less, they will be kept waiting on occasions.

(written 2007-01-10 23:12:26)

 
Associated topics are indexed under
A164 - Web Application Deployment - Services and Regular Jobs

Back to
Cue the music, I'm happy.
 Previous and next
or
Horse's mouth home		 Forward to
Our search engine placement is dropping.
Some other Articles
Chronic fatigue help - a new discussion forum
robots.txt - a clue to hidden pages?
Hotel for Trowbridge
Our search engine placement is dropping.
Linux / Unix - process priority and nice
Cue the music, I'm happy.
The Wheatsheaf 2, The Bell 0
Tomorrow's keywords - London, Training, Course, PHP, Ruby.
Web site - a refresh to improve navigation
Finding public writeable things on your linux file system
2259 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46 at 50 posts per page


This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).
Public Training Courses
Running regularly at our UK training Centre.
[Schedule] - [About] - [Book]
Related short articles
Tcl - nice and nasty
What Linux run level am I in?
Application design in PHP - multiple step processes
Stopping forum spam - control of the signup process
Through Snow and Flood to Linux and Tomcat
Summary - Apache httpd build on Linux
Summary of MySQL installation on a Linux system
Ruby, Perl, Linux, MySQL - some training notes
daemons - what is running on my Linux server?
sstrwxrwxrwx - Unix and Linux file permissions
Some Linux and Unix tips
Processing all files in a directory - Perl
Perl - map to process every member of a list (array)
What is my real and my effective ID? [Linux]
Dialects of English and Unix
FTP server on Fedora Linux
Co-routines in Lua - co-operative processing
Slow boot and terminal start on Linux boxes
Looking for files with certain characteristics (Linux / Unix)
The tourists guide to Linux
Linux and Java Course in London
Automating processes through Expect
Setting up a new user - Linux or Unix
Perl, PHP, Python, Tcl, Linux, MySQL, Ruby courses ...
Linux / Unix - layout of operating system files
Linux, PHP, Tcl, Ruby, C, C++ - last minute training course availability
Reading from another process in Tcl (pipes and sockets)
2008 course schedule - Perl, Python, PHP, Linux, Java Deployment, Ruby and more
Linux run states, shell special commands, and directory structures
ls -l report, Linux / Unix - types and permssions
Linux / Unix - process priority and nice
Finding public writeable things on your linux file system
Parallel processing in PHP
Moving files between Windows / DOS and Linux / Unix
Plain Ole nice pictures
The LAMP Cookbook - Linux, Apache, MySQL, PHP / Perl
No news is good news with Unix and Linux
What to do during a Linux build
Running external processes in Tcl and Tcl/Tk
Linux training Glasgow, Python programming course Dundee
Supporting users on Linux and Unix
Remember to process blank lines
Short Linux and Perl courses for small groups
File permissions of Linux and Unix systems
Linux commands - some basics
MySQL, Java, PHP and Linux - new technical articles
Linux - where to put swap space
Comparators in Linux and Unix
Linux / LAMP course
© WELL HOUSE CONSULTANTS LTD., 2009: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 707126 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho