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.
>>
>>
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--
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
