GC Logs - Need help discerning what's up

Need some help with this one. Why would a concurrent mark last for over 4000 seconds?
43415.531: [GC 43415.531: [ParNew: 130944K->0K(131008K), 0.0068140 secs] 216204K->86072K(1535936K) icms_dc=0 , 0.0070140 secs]
43446.687: [GC 43446.687: [ParNew: 130944K->0K(131008K), 0.0067580 secs] 217016K->86928K(1535936K) icms_dc=0 , 0.0069550 secs]
43478.323: [GC 43478.323: [ParNew: 130944K->0K(131008K), 0.0044850 secs] 217872K->87387K(1535936K) icms_dc=0 , 0.0046870 secs]
43520.735: [GC 43520.735: [ParNew: 130944K->0K(131008K), 0.0047830 secs] 218331K->87873K(1535936K) icms_dc=0 , 0.0049710 secs]
43557.266: [GC 43557.267: [ParNew: 130944K->0K(131008K), 0.0047220 secs] 218817K->88376K(1535936K) icms_dc=0 , 0.0049190 secs]
43617.278: [Full GC 43617.278: [CMS43617.573: [CMS-concurrent-mark: 0.296/4392.783 secs]
(concurrent mode failure): 88376K->40783K(1404928K), 0.7593660 secs] 218441K->40783K(1535936K), [CMS Perm : 31443K->31438K(52460K)] icms_dc=0 , 0.7596350 secs]
Here are the current settings.
-Xms1500m -Xmx1500m
-XX:NewSize=128M -XX:MaxPermSize=512M
-XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+CMSIncrementalPacing -XX:CMSIncrementalDutyCycleMin=0 -XX:CMSIncrementalDutyCycle=10 -XX:-DisableExplicitGC
Any recommendations on changes?
Lukas

Hi,
in your output, there is a full collection which is a stop-the-world collection and collects all genenerations of your heap. So it's not just a concurrent mark. This could be caused by a concurrent mode failure or a System.gc() call in your application (which also leads to the output "concurrent mode failure").
Have a look at these two blog entries to see what all this means and how you could try to avoid it:
http://blogs.sun.com/jonthecollector/entry/what_the_heck_s_a
http://blogs.sun.com/jonthecollector/entry/why_now
One thing: Are you aware that with the parameter -XX:-DisableExplicitGC
you do allow explicit GCs? Since this is the default, there is no use in setting this parameter. If you want to disable them (which would be worth a try), you have to specify -XX:+DisableExplicitGC.
Now, even if a full collection happens, why does it take to long? One reason I could think of is that you do not have enough physical memory and some parts of your old heap has been paged out to disk. At the collection, it then needs to be paged in which could take a while.
Nick.

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Planning and design. The Programmer Analyst takes the specifications
from the Systems Analyst and then determines the detailed tasks required to
create the code and UI.
Developing the application code and UI components. The Programmer
Analyst builds the code and UI components according to the functional
specifications and detailed design.
Other specific responsibilities in development include:
Working with the Systems Analyst to clarify and improve the design as
required. He or she may also prepare user documentation and will unit
test each piece of code to verify the basic functionality before passing it along
for more comprehensive testing. Throughout the project, the programmer analyst
consistently uses code management tools to avoid versioning problems.
Role Requirements
Problem solving and decision making
Learning agility
Client responsiveness
Project execution
Project analysis and planning
Technical Skills
Structured programming, design, and language(s) such as COBOL or C
Operating systems
Relational databases and data models (ex. DB2, Oracle or Access)
Source code management
Editing, compiling, and debugging tools
Creating user and technical documentation
Years of Relevant Experience Required: 0-4 years
Travel Required: None
COOL stands for COBOL Object-Oriented Language. It utilizes some of the
skills involved in both COBOL and C++ programming.
Again ANY HELP WOULD BE GREATLY APPRECIATED.
A

Actually, no. Just need time to get to your post. If you have not had your interview already try this.
One, bone up on your basic program structures.
Know basic keywords, etc.
Have your books in front of you and open to some topics that seem like test questions.
Review the content of the books that are pertinent. Prepare for the interview like you would a test.
ABOVE ALL - RELAX, sound confident that if you do not know the answer now you can look it up. This is an entry level position - They do not expect you to know everything - just have a basic understanding and be able to go from there.
Do not be afraid to say "I don't know but I know where to look in xxxx book".
Sorry, been busy today just got to forums.
If you posted without allowing a few hours for a reply then ....

Need help deciding what computer is best for me?

I am 14 years old and going into high school. I am debating whether to buy the new macbook or take my grandpa's original macbook air. I want to take programing/coding and graphic design classes, so I wanted to know which computer would be best for me? I like the macbook air for how like and easy it is to carry with me to and from school, but I'm not sure if it would be more beneficial to have the newer technology of the macbook? Any help or input would be great! Thanks

Can the money you don't spend now on a new computer be put aside to buy you a new computer at a later date? That is the key question. The trick with the Air is to avoid using up the harddrive, so the less stuff you have to put on it (games, movies), the better. Other than that, it should be able to do all you want it to do...for now. And given how much you poor students have to haul around in your backpacks , I think it's smart to go for Grandpa's Air and save yourself from hauling around nearly three extra pounds.
The Air is there and, I assume, it's going to be given to you at a good price ? Use it and see if it does all you need and want it to do. If you find it's too limiting, the Macbook Pros will still be there for you to get. What's more, if you hold off now, then as you near college--or where ever you're going after high school, you can use the money you didn't spend now for something that might be really excellent for your future in coding and graphics.
If it's feasible, I'd try out the Air for the summer and see if it's for you. The school specials on computers will be going for a while if you find it's not enough and you need more.

Need help burning- what is error 2131

PLEASE HELP ME!!! I really need this disc for school but the disc will not burn it pops out and says unknown error occured (2131) so what can i do to fix this please help me cause if i do not have this disc tomorow i will fail my class and am not allowed to use ipods for this assignment

With a 2131, a good policy is to check for any firmware updates for your DVD/CD drive. The following document might be of some help with that:
iTunes for Windows: Updating the firmware on your CD or DVD drive

I need help with motion control. I am programming in Visual Basic. I will need help with what parts I need to purchase from NI, along with help on the code.

I am using a Papst servo motor and I need to know where to start and what to purchase to get this motor to spin. I am using visual basic and in my program I calculate the direction and RPM's needed from the motor. It will spin anywhere from 1 to 10000 RPM's. It seems rather easy, but I have no idea on how to spin the motor at the specific RPM, and stop it with a command stop in the program. Please help.

We really should know a little more about your intended uses for this system, but assuming you want to do relatively simple (or even not so simple!) motion, you'll need a few components...
A motion controller, such as the PCI-7342, can take your VB commands and turn them into the commands needed to "run" the motor. Next you'll need a drive, such as the MID-7342. This includes the servo amplifier that actually powers the motor. It also has connections to "pass through" the encoder signals from the motor back to the motion controller.
The above-named pieces assume one or two axes of motion. You'll also need a cable to connect the two (can't remember the model right now). You can use MAX to configure the motion controller, and there are just a few VB calls you
'll need to make using NI-Motion functions to define the motion and get it going.
Hope this helps!

Need Help about what to buy

Hi,
I am a student at a college and we have Adobe Premiere Pro there and I just recently downloaded it and started the free trial so I can edit on my own at home.
I know we have another major video project coming and I am currently working on one now.
The question is, I am new to this. What should I buy, or what type of membership should I buy and do they provide discounts to students? Classes are only until May and I am not sure I will need this for next semester.
I appreciate any help!

alot of nle's and other programs have a student edition or discount. if you need to use adobe's software for your class etc, can look at their student subscription plan.
Student software discounts, student eligibility | Adobe

Wireless connections need help on what type to get.....

I have an iMac G5 and need to make it wireless. Due to construction. I believe its a 17 inch 1.8gh( I think). What would I need to make it wireless? Also my iMac is going to be a good 100-150 feet away and up a story from the dsl box. Plus the Floor itself is about 6 inches thick or more in spots. I don't think the airporter express will cover this range. And no there is no way of moving the box closer and I don't want a bunch of wires running all over the 2 story house. Any ideas of what product would be helpful in this case?
Thanks!
i Mac G5

"I don't think the airporter express will cover this range."
Have you tried it?
You will probably get more wireless info from the knowledgeable users in one of the AirPort Forums where the wireless users hang out.
To find out which model computer you have:
Need this info so that the knowledgeable users can provide you with the proper troubleshooting solution(s).
http://docs.info.apple.com/article.html?artnum=301724-en How to identify your iMac
http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh355.html Getting information about your computer
Also, you will probably need to advise which OS you are using.

Automount floods LDAP Log - need help

I've installed an LDAP server on a linux machine (with debian 5.0.4 on it), so I can share my login/home-directorys among my mac minis.
It took me a while to get everything working, but now I don't know how to fix this problem.
The users home-directorys are provided through a NFS server (also running on the linux machine) and in LDAP I have configured these automount setting:
dn: ou=mounts,dc=chemnitz,dc=abs-rz,dc=de
objectClass: top
objectClass: organizationalUnit
objectClass: domainRelatedObject
associatedDomain: chemnitz.abs-rz.de
ou: mounts
dn: automountKey=/home,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de
objectClass: automount
objectClass: top
automountInformation: auto_home
automountKey: /home
dn: automountKey=*,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de
objectClass: automount
objectClass: top
automountInformation: -fstype=nfs yoda3-vm4.chemnitz.abs-rz.de:/nfs/&
automountKey: *
dn: automountMapName=auto_master,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de
objectClass: automountMap
objectClass: top
automountMapName: auto_master
dn: automountMapName=auto_home,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de
objectClass: automountMap
objectClass: top
automountMapName: auto_home
In the user entry, there is an associating information about the home-directory f.e. /home/mg.
Everything works fine so far but the logs of my LDAP are flooded with this:
=> dn: [2]
=> acl_get: [3] attr automountKey
=> acl_mask: access to entry "automountKey=/home,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de", attr "automountKey" requested
=> acl_mask: to value by "", (=0)
<= check adnpat: cn=admin,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: uid=frank,ou=users,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: uid=mg,ou=users,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: *
<= acl_mask: [4] applying read(=rscxd) (stop)
<= acl_mask: [4] mask: read(=rscxd)
=> slapaccessallowed: search access granted by read(=rscxd)
=> access_allowed: search access granted by read(=rscxd)
=> access_allowed: search access to "automountKey=*,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de" "objectClass" requested
=> dn: [2]
=> acl_get: [3] attr objectClass
=> acl_mask: access to entry "automountKey=*,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de", attr "objectClass" requested
=> acl_mask: to value by "", (=0)
<= check adnpat: cn=admin,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: uid=frank,ou=users,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: uid=mg,ou=users,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: *
<= acl_mask: [4] applying read(=rscxd) (stop)
<= acl_mask: [4] mask: read(=rscxd)
=> slapaccessallowed: search access granted by read(=rscxd)
=> access_allowed: search access granted by read(=rscxd)
=> access_allowed: search access to "automountKey=*,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de" "automountKey" requested
=> dn: [2]
=> acl_get: [3] attr automountKey
=> acl_mask: access to entry "automountKey=*,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de", attr "automountKey" requested
=> acl_mask: to value by "", (=0)
<= check adnpat: cn=admin,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: uid=frank,ou=users,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: uid=mg,ou=users,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: *
<= acl_mask: [4] applying read(=rscxd) (stop)
<= acl_mask: [4] mask: read(=rscxd)
=> slapaccessallowed: search access granted by read(=rscxd)
=> access_allowed: search access granted by read(=rscxd)
=> access_allowed: read access to "automountKey=*,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de" "entry" requested
=> dn: [2]
=> acl_get: [3] attr entry
=> acl_mask: access to entry "automountKey=*,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de", attr "entry" requested
=> acl_mask: to all values by "", (=0)
<= check adnpat: cn=admin,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: uid=frank,ou=users,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: uid=mg,ou=users,dc=chemnitz,dc=abs-rz,dc=de
<= check adnpat: *
<= acl_mask: [4] applying read(=rscxd) (stop)
<= acl_mask: [4] mask: read(=rscxd)
=> slapaccessallowed: read access granted by read(=rscxd)
=> access_allowed: read access granted by read(=rscxd)
=> access_allowed: read access to "automountKey=*,ou=mounts,dc=chemnitz,dc=abs-rz,dc=de" "automountInformation" requested
About 4 or 5 logs per second - Is this normal? - What can I do to reduce this traffic?
My slapd is running mit -d acl and there is only 1 client logged on.
Thank you in advance for your help.
- mgoe

no ideas?

GC Logs - Need help discerning what's up

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