Re: Application Freezes!
Re: Application Freezes!
- Subject: Re: Application Freezes!
- From: Chuck Hill <email@hidden>
- Date: Fri, 4 Nov 2005 13:36:53 -0800
On Nov 4, 2005, at 1:32 PM, James Cicenia wrote:
Aha - P. 92 perfect.
:-) Let us know what you find out.
Well, it is hard to wait around when my app refuses new sessions,
wostats won't comeback, and to kill the instance is the only way
out. Couple that with "subscription" subscribers, well I have no
time to time it! So freeze == stall == hung == bounce!
Multiple instances...
Linux has been mandated to me. I did once get it running on
WebSphere/db2 ... quite a nightmare. So, I think mySQL and jBoss
should be easy enough.
"should be easy enough". Sounds like famous last words. "What could
possibly go wrong?" LOL
Chuck
On Nov 4, 2005, at 3:25 PM, Chuck Hill wrote:
On Nov 4, 2005, at 1:14 PM, James Cicenia wrote:
Well -
This has just started to happen now that we launched a new module
that is more transaction intensive.
Maybe you need to define "freeze" a bit better. Does it stall or
freeze? Does it ever come back? How long have you waited?
Our concurrent users have also been boosted. It is mySQL on a Mac
Mini runing TigerOSX Server with 1Gig. Don't laugh, amazing it
has gone this far! I will try turning on another instance and
see. There was nothing in my log files... they just stopped with
nothing out of the ordinary.
Anyway my next step is to move deployment to Linux.
No. Moving the problem to a new machine won't fix it. Your next
step is to determine if it really is freezing. If so, the next
step is to determine why and fix it. Then you can look at a new
machine. If it is indeed freezing, you need to get a thread
dump. Page 92. Ya know what I mean. :-)
Any suggestions here? Redhat? JavaMonitor or jBoss? Licensing?
XServe.
Chuck
James Cicenia
On Nov 4, 2005, at 3:01 PM, Chuck Hill wrote:
On Nov 4, 2005, at 12:51 PM, Miguel Arroz wrote:
Any thoughts? Do I need to create multiple instances now? I
only have one
instance currently.
We very rarely run a single instance.
Is there any advantage in running more than one instance on
the same server?
Advantage? We only run a single instance if we are desperate
for memory! Running multiple instances allows you to process
higher loads (EOF is only single threaded within the instances)
and provides for much better availability. With only a single
instance, if you recycle it your site is out until it restarts.
As single instance is only for memory starved machines and very
low traffic sites.
Chuck
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Coming in 2006 - an introduction to web applications using
WebObjects and Xcode http://www.global-village.net/wointro
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve
specific problems. http://www.global-village.net/products/
practical_webobjects
--
Coming in 2006 - an introduction to web applications using WebObjects
and Xcode http://www.global-village.net/wointro
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems. http://www.global-village.net/products/practical_webobjects
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