Java Performance Tuning

Java(TM) - see bottom of page

|home |services |training |newsletter |tuning tips |tool reports |articles |resources |about us |site map |contact us |
Tools: | GC log analysers| Multi-tenancy tools| Books| SizeOf| Thread analysers|

Our valued sponsors who help make this site possible
JProfiler: Get rid of your performance problems and memory leaks! 

Training online: Threading Essentials course 

News November 2018

JProfiler
Get rid of your performance problems and memory leaks!


Java Performance Training Courses
COURSES AVAILABLE NOW. We can provide training courses to handle all your Java performance needs

Java Performance Tuning, 2nd ed
The classic and most comprehensive book on tuning Java

Java Performance Tuning Newsletter
Your source of Java performance news. Subscribe now!
Enter email:


Training online
Threading Essentials course


JProfiler
Get rid of your performance problems and memory leaks!


Back to newsletter 216 contents

This month and next month I'll highlight the very best of the over 300 tips I've extracted this year. The top tip of the year was on development techniques that apply to different latency targets, and was so good I turned it into July's newsletter.

My next choice of "tips of the year" is another set of development techniques, actually a combination of a set of tips on thread-safe techniques. Combining them into one makes for a single killer tip: Avoid state; Avoid shared state; Use a single-consumer-queue with updates executed by a single thread; Use immutable state; Use mature concurrent datastructures; Use synchronized blocks; Use volatile fields but only when the writes to the field do not depend on the current value of the field; Use atomic updates.

My third choice for "tips of the year" is one giving advice on managing your systems: Monitoring does not fix problems - if you find yourself constantly adding more monitoring for a service, stop and invest your effort into making the service more stable and resilient. More monitoring doesn't fix a broken system, and it's not an improvement for a broken service.

My final choice of "tips of the year" for this month is a secret technique that performance experts use to magically go from GC logs to telling you about your system IO or CPU (rather than about your GC): If the ratio '(user+sys)/real' is significantly less than 1 for a GC log entry, this is a good indication of a problem with the system - either IO is causing the GC to be blocked for a while, or CPU is saturated on the system by activity from other processes.

Now on to this month's tips, tools, news, articles, and talks from our extensive community. And of course the tips from this month's articles and talks, as ever are extracted into this month's tips page.

A note from this newsletter's sponsor

JProfiler
Get rid of your performance problems and memory leaks!

News

Java performance tuning related news.

Tools

Java performance tuning related tools.

Articles

Jack Shirazi


Back to newsletter 216 contents


Last Updated: 2018-11-28
Copyright © 2000-2018 Fasterj.com. All Rights Reserved.
All trademarks and registered trademarks appearing on JavaPerformanceTuning.com are the property of their respective owners.
Java is a trademark or registered trademark of Oracle Corporation in the United States and other countries. JavaPerformanceTuning.com is not connected to Oracle Corporation and is not sponsored by Oracle Corporation.
URL: http://www.JavaPerformanceTuning.com/news/news216.shtml
RSS Feed: http://www.JavaPerformanceTuning.com/newsletters.rss
Trouble with this page? Please contact us