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Blog for America: Comment on Governor
Dean to Comment Shortly

Blog for America: Comment on Governor
Dean to Comment Shortly 12/16/2003 05:30 AM
America's Palestinians .. Dean for President .. campaign blog .. "Carrie B."

blog.deanforamerica.com/cgi-bin/mt/mt-comments.cgi?entry_id=2682
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Who ate the threads?

Who ate the threads? 03/11/2003 09:31 PM

I tried the kill -QUIT trick on FreeRoller this afternoon after it locked up. Looking at the stack traces for Tomcat's 75 threads, I found that most were either waiting for database connections or involved reading cache entries from the disk.

Recently, I had changed to OSCache settings so that Roller caches to disk rather than to memory. I did that because Roller was running out of memory. Caching to disk fixed the out-out-memory problem, but at the expense of heavy disk access. So, I changed the OSCache settings back to cache to both disk and to memory. OSCache seems to have some limitations in this area. Apparently, if you configure OSCache to cache in memory and to disk, you can limit the number of entries in the memory cache, but the disk cache is unlimited - which is not the best situation.

Also, I changed the DBCP connection pooling parameters to reduce the maxIdle and maxWait so that threads will timeout quickly rather than hanging around waiting for connections and thus forcing the creation of new threads.

Those changes kept FreeRoller up for a much longer period of time, but did not fix the problem.

On Threads

On Threads 06/17/2005 04:38 PM

Last week I attended a Sun “CMT Summit”, where CMT stands for “Chip Multi-Threading”; a roomful of really senior Sun people talking about the next wave of CPUs and what they mean. While much of the content was stuff I can’t talk about, I was left with a powerful feeling that there are some real important issues that the whole IT community needs to start thinking about now. I’ve written about this before, and of the many others who have too, I’m particularly impressed by Chris Rijk’s work. But I think it’s worthwhile to pull all this together into one place and do some calls to action, so here goes. [Ed. Note: Too long and too geeky for most.]...

Threads

Threads 04/06/2005 09:09 PM
Stable

Threads Redux

Threads Redux 06/22/2005 02:04 AM

The June 12th On Threads piece got slashdotted (twenty thousand hits for a 2,300 word hard-tech piece, not bad), which provoked really interesting feedback from (among others) David Dagastine, Greg Wilson, and Ben Holm, along with pointers to some related work. All those pointers are worth following, and some of the points are worth a little more discussion...

Case Threads

Case Threads 11/17/2003 09:17 AM
Case Threads Releases 0.5 Alpha

FreeRoller eating threads.

FreeRoller eating threads. 03/11/2003 11:53 AM

FreeRoller keeps on running out of threads to process incoming requests. This could be a problem in Roller, but I suspect that we may have run up against this bug in the Tomcat 4.0.X HTTP connector:

BUG5735: HTTP connector running out of processors under heavy load

The bug is marked as fixed, but I think that means the fix is in the new Tomcat 4.1.X Coyote HTTP connections.

Next time this happens, I'll try Glen Nielson's advice (from the bug report):

I would recommend that you dump the stack for all running threads when
you experience this problem.  This can help identify what is causing
the
problem. By reviewing the stack dump for each thread you can determine
whether the problem is due to Tomcat or your application.

On unix you do a kill -QUIT {tomcat java pid) to cause the thread
stack's 
to be dumped to catalina .out.

A Processor for Tomcat runs your application code, delays in your code
can cause additional processor threads to be created to handle new
requests.
Possible application or configuration problems which can delay
requests:

   Connection delays due to networked services such as a db.
   Connection delays due to running out of pooled resources.
   Thread synchronization deadlocks.
   A cascading affect where many new processors get created due to
   excessively long JVM Garbage Collections.  start java with
   -verbose:gc to detect this.

Top Ten Official ExtremeTech Threads of
2004

Top Ten Official ExtremeTech Threads of
2004 12/29/2004 08:28 PM
Our forum moderator, Jim Lynch, takes you through this past year's top ExtremeTech discussions in our technology forums.

Eric Albert on counting threads

Eric Albert on counting threads 11/02/2003 02:07 PM
I had lunch with Eric Albert and Buzz Andersen at the OS X conference. Eric helped me debug a mach port leak in NetNewsWire. It was in a method which counted the current number of threads in use.

In case you’re curious about how to count threads, here’s Eric's post on how to do it without leaking mach ports.

Drag threads in Mail.app with Logitech
mouse

Drag threads in Mail.app with Logitech
mouse 04/16/2004 10:24 AM
In 10.3.3 's mail program, with my Logitech two-button, scroll trackball mouse, if I select a closed thread and click both mouse buttons and drag down, the thread will expand. [robg adds: I can't duplicate this with a Micros...

10.3: Expand Mail.app threads in slow
motion

10.3: Expand Mail.app threads in slow
motion 12/15/2003 11:45 AM
Just as useless as the other shift slow motion hints, but if you hold the shift key down while opening a group of messages in Mail (with the little arrow), it will expand or collapse slowly. I am starting to see a trend here....

HotFix Watch: Patch UI Monitor component
may leak threads

HotFix Watch: Patch UI Monitor component
may leak threads 01/04/2005 05:44 PM

Net-Delicious-0.71

Net-Delicious-0.71 09/21/2004 12:55 AM

Net-Delicious-0.7

Net-Delicious-0.7 09/17/2004 05:52 PM

Net-Delicious-0.6

Net-Delicious-0.6 07/08/2004 10:45 AM

Virginity Security Advisory 2003-002 :
Tritanium Bulletin Board - Read and
write from/to internal (protected)
Threads

Virginity Security Advisory 2003-002 :
Tritanium Bulletin Board - Read and
write from/to internal (protected)
Threads 10/31/2003 06:22 PM
Virginity Security (Oct 31 2003)

A Look at Delicious Library 3.0.

A Look at Delicious Library 3.0. 08/12/2004 12:38 AM
Think Secret: A Look at Delicious Library 3.0.

delicious dish!

delicious dish! 09/04/2004 03:39 PM
RumorFilter: The Family by Kitty Kelley, comes out on the 14th. It reveals how Dubya has had a very special friend in the mayor of a Tennessee city, who has has cohabited at the Texas ranch many times is just one of the rumors flying around about this book. Kitty's written about Sinatra, Nancy Reagan, Jackie O, and the Royals, so what's she got up her chiffon sleeves this time? Start dishing!

Net-Delicious-Export-1.1

Net-Delicious-Export-1.1 02/12/2004 10:09 AM

Delicious Downloads

Delicious Downloads 06/14/2004 08:11 AM
Consuming fast food may be hazardous to your eardrums.

Delicious Library

Delicious Library 12/17/2004 06:34 PM
Delicious Library is now available. The application catalogues your media (DVDs, CDs, books, Video games etc) by scanning it’s barcode with an iSight webcam, then retrieves a mass of information on your items through the internet (from Amazon and IMDB). I’ve yet to check it out properly but it looks great (fake wood aside) and promises to be a very useful piece of software.

The Future is Here, and it Looks
Delicious

The Future is Here, and it Looks
Delicious 04/26/2004 10:13 AM
One of my only regrets about working at Gizmodo is how rarely I get to write about my true passion: meat. Thank All That Is Flammable, then, for this Q BBQ, a portable barbecue grill that folds up for luggable flesh-burning fun. The propane-powered gewgaw pumps out real flame, not...

Some Rice Is Delicious

Some Rice Is Delicious 05/07/2004 03:02 PM
Ever wonder what happens when crazy Japanese bosozoku biker gangs get a hold of unregistered old-school Cressidas, American street muscle, scooters, and huge moving vans? Good things, my friends, depending on how much you like ginormous chromed parts, over-the-top body panels, and enough lights to advertise a whole ocean's worth...

mozdev.org - delicious

mozdev.org - delicious 06/05/2005 11:43 PM

MozDev.org - Delicious

mozdev.org - delicious
http://delicious.mozdev.org/
del.icio.us is a social bookmarks manager. It allows you to easily add sites you like to your personal collection of links, to categorize those sites with keywords, and to share your collection not only between your own browsers and machines, but also with others. This extension integrates del.icio.us with Firefox. This has been added to Social Informatics Subject Tracer™ Information Blog.

Delicious Eye Candy

Delicious Eye Candy 08/27/2004 01:33 PM

X.Org is set to release a new version of their X11 server tomorrow (X11 is the system that drives the GUI desktop on Linux and other UNIX systems). The notable part of this release will be extensions to the X protocol that will allow more flexibility in the compositing of windows. This allows for drop shadows on windows, translucent windows, and other visual effects (The screenshot at right is a bit small, but it shows a video playing at 50% transparency with a browser behind). Linux-Gamers.Net has the full scoop:

Another useful feature is the inclusion of the new XDamage extension. Monitoring the regions affected by rendering has wide-spread use, from VNC-like systems scraping the screen to screen magnifying applications designed to aid users with limited visual acuity. The DAMAGE extension is designed to make such applications reasonably efficient in the face of server-client latency.

This all seems a bit technical, I know, but it will mean a more 'Mac-like' visual experience for Linux desktops, and more efficient rendering. The screenshots look great. Windows users, don't worry. I'm sure Longhorn will be along eventually. Right? =)

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BetterSearch on delicious

BetterSearch on delicious 02/05/2005 09:50 PM

(BetterSearch on delicious, originally uploaded by mathowie)

This is kickass. I tried this extension a couple months ago for improved looking google searches, but it even works at delicious which was a complete surprise. Very cool.

Delicious gets funding

Delicious gets funding 03/31/2005 12:34 PM
Congrats to Joshua on delicious funding. [delicious-discuss] big news...

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Beyond Delicious: Could Chocolate Also
Be Good for You?

Beyond Delicious: Could Chocolate Also
Be Good for You? 02/16/2004 07:53 PM
Raw cocoa contains flavonoids, plant-based compounds with protective antioxidants like those in green tea.

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[delicious-discuss] big news

[delicious-discuss] big news 03/30/2005 07:37 AM
Joshua Schachter deja su trabajo para dedicarse 100% a del.icio.us .. joshua quits to work on del.icio.us full tiime .. [delicious-discuss] big news

lists.del.icio.us/pipermail/discuss/2005-March/002554.html
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