Hi Garrett,
> be much, much smaller. And I doubt the problem is the Java code. Even
> JSpider on my AMD64 Ultra20 is 94 MB. The JVM is a pig.
Take a look at this blog:
http://weblogs.java.net/blog/xiaobinlu/archive/2005/08/perception_real.html
In Java 6 the (perceived) footprint you're seeing should be reduced.
Thanks,
Dmitri
Java2D Team
On Mon, Jun 26, 2006 at 12:13:15PM -0700, Garrett D'Amore wrote:
> Dan Davies Brackett wrote:
> > (crossposting the reply too.)
> >
> > Cacao is the Common Agent Container, the single JMX container that all
> > Sun's manageability solutions are supposed to run in. I know it gets
> > used for basic system information collection for Software Update and
> > the registration nagware that comes up when you log in, which brings
> > me to the next line...
> > swupna.jar is probably related to Software Update; have you tried
> > registering (it's free) for software update and letting it get its
> > little icon out of the JDS tray?
>
> Yes, I did register using the nagware.
>
> I'm going to reboot this system and see if it doesn't start those Java
> apps. It really is quite unfortunate that these things are piggy as
> they are. This is a strong argument against writing "standard" system
> software in Java, IMO -- the equivalent C functionality would probably
> be much, much smaller. And I doubt the problem is the Java code. Even
> JSpider on my AMD64 Ultra20 is 94 MB. The JVM is a pig.
>
> -- Garrett
> >
> > Garrett D'Amore wrote:
> >> I've noticed something scary. My UltraBook IIi has 256 MB. Here's the
> >> output from top with nothing except JDS running:
> >>
> >> last pid: 2314; load averages: 0.08, 0.32, 0.36
> >> 11:13:42
> >> 67 processes: 62 sleeping, 4 running, 1 on cpu
> >> CPU states: 97.4% idle, 0.7% user, 2.0% kernel, 0.0% iowait, 0.0%
> >> swap
> >> Memory: 256M real, 54M free, 228M swap in use, 435M swap free
> >>
> >> PID USERNAME LWP PRI NICE SIZE RES STATE TIME CPU COMMAND
> >> 2314 root 1 59 0 2072K 1632K cpu 0:00 0.56% top
> >> 1138 root 22 59 0 115M 42M run 0:37 0.49% java
> >> 1370 root 14 49 0 105M 18M run 0:06 0.35% java
> >>
> >> Notice that the two Java process are sucking up a large chunk of
> >> memory. Even if you only look at resident memory, these occupy well
> >> over 50MB.
> >>
> >> What are these two Java processes? Well the "big" one (42MB) appears to
> >> be running com.sun.cacao.container.impl.ContainerPrivate, and the
> >> smaller (18M) one appears to be running /usr/lib/patch/swupna.jar
> >> (-wait).
> >>
> >> Again, this is UltraSPARC platform stuff. Admittedly 256 MB is a little
> >> smallish for RAM these days, but still....
> >>
> >> What the heck is Cacao? And why does Java want so much memory? I
> >> should probably ask this on one of the other lists than laptop-discuss,
> >> but since laptops are often more resource constrained, it still seems
> >> somewhat appropriate to raise the issue here.
> >>
> >>
> > _______________________________________________
> > laptop-discuss mailing list
> > laptop-discuss at opensolaris.org
>
>
> --
> Garrett D'Amore, Principal Software Engineer
> Tadpole Computer / Computing Technologies Division,
> General Dynamics C4 Systems
> http://www.tadpolecomputer.com/
> Phone: 951 325-2134 Fax: 951 325-2191
>
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