Latest news

NEW: NOVEMBER NEWSLETTER

• We list all the latest Java performance related news and articles
  • "Oracle are targeting providing deterministic low latency pauses in G1 - aiming for consistent deterministic pauses in the 10ms range"
• All the latest Java performance tips extracted in concise form
  • "Software-based contention management can improve the performance of hardware based compare-and-swap operations. By using contention management and backoff techniques, you can improve throughput by an order of magnitude at high contention, with only a small overhead at low contention"
• All Java performance books listed at fasterj.com

OCTOBER NEWSLETTER

• We list all the latest Java performance related news and articles
  • "I've listed all the Java multi-tenancy tools in this month's tools section"
• All the latest Java performance tips extracted in concise form
  • "Scalability problems are solved by: 1. Doing less work (simplest option); 2. Tuning what you have (simple to moderate difficulty); Throwing more resources at it (moderately difficult); Fixing the code (difficult); Rearchitecting (most difficult option)."

SEPTEMBER NEWSLETTER

• We list all the latest Java performance related news and articles
  • "if you look in the JDK bin directory there are now many tools in there that I would categorize as providing "visibility" into the JVM: jcmd, jconsole, jhat, jinfo, jmap, jmc, jps, jsadebugd, jstack, jstat, jstatd, jvisualvm"
• All the latest Java performance tips extracted in concise form
  • "If looping on Object.wait(), you might want to first reset the thread's interrupted state (e.g. if(Thread.currentThread().isInterrupted()) Thread.currentThread().interrupted();) before entering the wait() on each iteration or it could just throw the exception every iteration leading to a Livelock situation."

AUGUST NEWSLETTER

• We list all the latest Java performance related news and articles
  • "Load on the server is NOT a measure of user performance - if a user's session gets frozen, that reduces the load on the server. But for sure performance has not improved for that user."
• All the latest Java performance tips extracted in concise form
  • "GC ergonomics (UseParallelGC with -XX:+UseAdaptiveSizePolicy) tries to meet, in order, the: pause time goal; throughput goal; minimum footprint. To find out what the ergonomics are doing, set -XX:AdaptiveSizePolicyOutputInterval=1 which will print the ergonomics details every GC."

Previous newsletters

All our previous newsletters can be viewed from here

How to use this site

This site has four main information resources:

• The uncategorized tips page lists many other web pages with Java performance tuning related information. Each web page has its performance tuning tips extracted and listed immediately after the URL is listed. These tips are being categorized, and the tips page links to those categories currently available. If the performance area you are interested in is not yet categorized, send us an email from this page telling us the categorization you'd like to see. In any of the tips pages, use your browser's "find" or "search" option to identify particular tips you are interested in on the page, and follow up by reading the referenced web page if necessary or desired.
• The resources page lists Java performance tuning resources including books, tools, reports, other performance tuning sites of interest, and Java performance tuning discussion groups.
• The news pages are monthly newsletters listing any new Java performance tuning related information, together with Kirk Pepperdine's discussion group roundup and Javva The Hutt.
• The tool reports pages are detailed introductory reports on various Java performance related tools, for both free and commercial tools.

This site has been designed to download almost as fast as possible. (Some stylistic markup and required server-side processing has been used in preference to absolute speed contraints.) The web tree contains very few graphics and almost no complex typesetting markup except for very simple tables, and the main pages can be accessed directly from the menu.

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