Clustering on multi cpu box without multicast

          Just wonder whether weblogic cluster can be configured to not use IP multicast
          if the clustered servers are running on the same multi cpu box as I would have
          thought that in memory communication would be a faster option in this case.
          This is again as we were told that Weblogic doesnt scale well for more than 2
          cpus per box.
          If we are using a 4-6 cpu box then in this case it makes more sense to have 2/3
          instances
          per server communicating via mem and not multicast

Just wonder whether weblogic cluster can be configured to not use IP          multicast
          > if the clustered servers are running on the same multi cpu box as I would
          have
          > thought that in memory communication would be a faster option in this
          case.
          Multicast with a TTL of zero is basically implemented by the OS as a shared
          memory approach, so there is usually very little difference in performance.
          > This is again as we were told that Weblogic doesnt scale well for more
          than 2
          > cpus per box.
          > If we are using a 4-6 cpu box then in this case it makes more sense to
          have 2/3
          > instances
          > per server communicating via mem and not multicast
          The scalability on various numbers of CPUs differs greatly. It is vastly
          improved on more recent versions of WebLogic with more recent versions of
          the JVM. Back on JVM 1.2 with WL 5.x and earlier, you would have to run
          multiple instances in order to "soak" a box. The best way to determine if
          this is still the case is to use a load test that (with everything else
          equal) will soak the box with multiple JVMs but not with a single one.
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com/coherence.jsp
          Tangosol Coherence: Clustered Replicated Cache for Weblogic
          "r g" <[email protected]> wrote in message
          news:3f181388$[email protected]..
          >

Similar Messages

Clustering on single box without using multihoming

is it possible to set up a cluster between two instances of weblogic on the
          same box without using multihoming, but using different port numbers (or any
          other non-multihome solution).
          andrew park


Using the same port number is the requirement for setting a cluster. So, the
          answer is no.
          Cheers - Wei
          Andrew Park <[email protected]> wrote in message
          news:8f6jm2$d61$[email protected]..
          > is it possible to set up a cluster between two instances of weblogic on
          the
          > same box without using multihoming, but using different port numbers (or
          any
          > other non-multihome solution).
          >
          > andrew park
          >
          >

Clustering on a single box.

Is there typically a performance benefit from clustering EJBs on single box?
          That is, running a number of smaller (memory footprint) Weblogic Servers on
          a single machine vs. one larger instance. In its simplest form, we have an
          application where stateless session beans are used to perform transactions
          on behalf of the client.
          I think this boils down to JVM performance characteristics. Can the JVM
          provide adequate memory management for object creation, GC, etc.
          We are using NT, have a gigabyte of memory and using Sun's JVM version
          1.2.2.


          For starters, check: http://www.enteract.com/~bradapp/links/
          Search for "Garbage Collection & Memory Management"
          Srikant, [email protected], http://www.weblogic.com/, etc.
          Chaminda Peries wrote:
          > Rob could you please tell me where I can find the research you mentioned ?
          >
          > Thanks
          >
          > Chaminda Peries
          >
          > Rob Woollen wrote in message <[email protected]>...
          > > In general, there is a benefit to clustering multiple java vms on a
          > single
          > >multi-processor box.
          > >
          > > Most (if not all) current java vms will stop all the threads, initiate
          > a
          > >garbage collection, and then restart each thread. During the gc pause,
          > you
          > >will generally see 1 cpu at 100% while the others idle.
          > >
          > > By running multiple jvms, you will stagger the collection times.
          > >
          > > If you are interested, there is a large body of research on concurrent
          > and
          > >incremental gc algorithms.
          > >
          > >-- Rob
          > >
          > >Todd Shutts wrote:
          > >
          > >> Is there typically a performance benefit from clustering EJBs on single
          > box?
          > >> That is, running a number of smaller (memory footprint) Weblogic Servers
          > on
          > >> a single machine vs. one larger instance. In its simplest form, we have
          > an
          > >> application where stateless session beans are used to perform
          > transactions
          > >> on behalf of the client.
          > >>
          > >> I think this boils down to JVM performance characteristics. Can the JVM
          > >> provide adequate memory management for object creation, GC, etc.
          > >>
          > >> We are using NT, have a gigabyte of memory and using Sun's JVM version
          > >> 1.2.2.
          > >

Multi-Select Box Not Displaying Values Passed From Grid?

Coldfusion 8
I inherited an application and am trying to maintain and improve it... hit a snag today.
I have a multi-select box that is not displaying what I expect. The values come from a ColdFusion grid which is based off a database query.
Here is the code for the select - does not work - nothing is selected:
<cfselect name="USER_IDS" multiple="true" queryposition="below" selected="USER_IDS" query="ActiveUsersPlus" disabled="#disabled#" value="G_USER_WORK_UNIT_SK" display="G_USER_ID" >
</cfselect>
Now if I change the multiselect to a single select like below - it takes the first item in the field list (from the grid) and selects it in the drop down.
<cfselect name="USER_IDS" multiple="false" queryposition="below" selected="USER_IDS" query="ActiveUsersPlus" disabled="#disabled#" value="G_USER_WORK_UNIT_SK" display="G_USER_ID" >
</cfselect>
Or if I assign a variable like this and use the multi-select code it seems to work as well.
testlist = "22,26";
<cfselect name="USER_IDS" multiple="true" queryposition="below" selected="#testlist#" query="ActiveUsersPlus" disabled="#disabled#" value="G_USER_WORK_UNIT_SK" display="G_USER_ID" >
</cfselect>
I have displayed the value of "User_IDs" in the grid and in the data entry part of the screen to see values of: 22,26
to make sure that wasn't my issue.
Do grids and multiselects require something additional? Any advice on how to resolve?

Problem was related to some javascript for the select box. There was a function for a single select box but not a multiple select box - this fixed it:
if(theForm.elements[i].type == "select-multiple"){
                    var selectBox = theForm.elements[i];
                    var sbname = selectBox.name;
                    cpvalue = String(eval('record.data.' + sbname));
                    var NotifyArray = cpvalue.split(',');
                    for (var j=0; j < selectBox.length; j++) {
                        selectBox[j].selected = false;
                    for (var j=0; j < selectBox.length; j++) {
                        sbvalue = selectBox[j].value;
                        for (var k=0; k < NotifyArray.length; k++){
                            if (sbvalue == NotifyArray[k]){
                                selectBox[j].selected = true;

High CPU usage without any application running on the laptop

Hi ,
I saw some earlier posts as well but I am not sure if anything is helping me. I have a HP Pavilian Dv6. Its with me for now since 2009 or so. It was all running very well till last Nov - Dec 2013 timeframe. I had many bulky work done on the laptp like video cutting editing , along with audio edits , fairly well. I used it mostly for videos and no games though.
Since Nov - Dec 2014, all the videos started slowing down, extremely jerky, and not catching up with the audio. Slowly the problem became worse . After 10 mins of video it just stopped and hanged. It did it with every site and any format of video including videos on my C Drive. I earlier tried a lot of things, playing around with flash player thinking that's the culprit. Did not help. Browsers changed, Mozilla, internet explorer , Chrome, everything no change. Then till around last week, I tried tested, uninstalled a lot of programs, also did Microsoft system restore and seen , the CPU continously behaved reaching to its 100% peak and the videos getting shot down. Just no change. Last week , I got desperate and finally reformatted my hard drive and did a factory restore on the laptop. IT DID NOT HELP !! The laptop behaved really like a good puppy for a few days , Youtube and what not and again since yesterday it has been shot down ! No videos will run. What's more even a DVD video is not running , nothing on a browser a simple DVD player DVD play is not running. Jerky videos and hanging issues.
Everything boils dows to 100% CPU usage. Even if I am closing all my applications , it shows 'system' as the process using 90-100% CPU. Without any browser or even a notepad option open. There is also a prgram 'dwm' which eats up the next big slot of CPU.
I am really tired of this and not able to enjoy anything. Please suggest what could be the issue here and how can it be helped?

Just to add the laptop is HP Pavilian DV6 , model Dv6t - 1300.

How do i delete all of the emails in my in box without having to click on each and every one ?

how do i delete all of the emails from my in box without having to click on each one ?

Press CTRL+click on any empty checkbox to check them all.
tt2

SIGBUS with -Xincgx/-Xconcgc for JDK 1.5 on multi-CPU system

Hi,
I've been having trouble with random crashes using 1.5.0_03 up to _07 on Solaris and Linux (x86), especially on multi-CPU hosts. This is for a Web server (Tomcat 4.1.x), where CMS has been wonderful in avoiding the sometimes-horrible (multi-minute) GC pauses that I otherwise saw inspite of paranoid care with memory (and other resource use) in my code.
I have sent in a few crash dumps via a variety of routes but none have so far surfaced in the public bug reports.
I suspect something like a missing memory barrier or 3 in the CMS code, as I have commented against one of the extant bug reports.
I have had to stop using -Xincgc/-Xconcgc on a 2-CPU machine, but as I have a T1000 due for delivery within the next week, I really do not want end up using a stop-the-world GC to avoid the JVM crashing!
Are any SIGBUS-type problems fixed in _08 or _09?
Rgds
Damon

We have found, and are in the process of fixing, at least two
long-standing bugs in the concurrent collector that may have
affected you. (But the latter is conjecture.)
Those bugs are still present in the public beta version of Mustang.
So, if you are able to reproduce the crashes with Mustang,
then please contact us at hotspotgc dash feedback at sun dot com
so we can have you test the fixes we have made, as well
as, if possible, get your test case so we can use it to test
the parallel/concurrent collector more thoroughly.
Refer to CR 6429181 and CR 6431128, and include a pointer
to this thread. At least two of the fixes we have in mind are, however,
orthogonal to the use of ParNew, and should exhibit even
if you turn off UseParNewGC.
By the way, a full complement of support options is available
at: developer.sun.com/services

Multi-server Environment without Windows Domain

Hi,
Has anyone had experience with installing SAP BPC in a multi- server environment without using Microsoft Active Directory as a domain. (ie just using local users for everything).
Do we need to create a domain in order in successfully install and use the BPC? If that is the case, which server is best suited to install the domain on?
Many thanks

Hi,
Do you have at least a domain for hosting your servers ? Without an administrative domain for computer and technical accounts I doubt you could even make BPC work in a multi-servers environment.
If you don't have a domain for your users, you may (but i will never recommend it), create all your users localy. But you will have to create them on all BPC servers with same name / same password. Password adminisration will be a real mess as you will have to change the password on all machine each time the user want to change it. And this will not be done by the end-user but by IT staff. Also, users will not be able to use Windows Integrated Authentication functionnality.
So basically, yes use a domain for computer and users. The most easy architecture is to use a single domain for both computer and users.
If you have to install a Windows AD, I would take a look at Microsoft white paper and KB. But I think that you have to dedicate at least 1 machine for it (best is to have 2 servers for fault tolerance).

Multi language website without a database?

I would like to make a website in norwegian and english (perhaps also in spanish).
I use DW5 but I don't have much experience with databases (so I don't use this in this case).
Are there any way to make multi language site - without make a copy of the whole site and correct it? Of course I will have to change the text in the webpages, but I'm more thinking of the dwt-(template-files) and css-files...Not making new dwt and css file but keep them, and correct text pages.
Could I use some kind of script?
Is this this enough information to understand what I want to do?
Hope for the best
Morten

Hi
Yes, there is enough information to say that there is no 'magic' script that will do what you wish and that the way you describe, (create separate pages for each language) is the only way to do this if you do not wish to use a database.
You could use Google's translate to do the translation when the specific language is selected, but in my experience the translations are only usable as an approximation, and definitely should not be used on a professional web site as the actual content.
PZ
www.pziecina.com

Create Directory Dialog box without specifying file name

Hi all Programmers/Developers/JDC memebers
I would like to know in java is there any method or class which helps to give directory dialog box without specifying filename.
I mean to say if u have c,d,e drives and some directories under them
c:\dir1
c:\dir2
d:\dir1
d:\dir2
i want a dialog box,which dispalys all the directories of the selected drive and upon choosing/selecting that directory i should be able to get all the files under them.

Hi,
You can write a file filter for a JFileChooser, in the following way,
public class DirectoryFilter extends javax.swing.filechooser.FileFilter
public boolean accept(java.io.File file)
boolean filter = false;
if(file.isDirectory())
filter = true;
return filter;
public String getDescription()
return "Directories only";
//in your code
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileFilter(new DirectoryFilter());
fileChooser.showOpenDialog() etc. etc..
There's one small issue, by default JFileChooser has a filter called all files filter which you can select from the combo labled "files of type" . So, your file filter won't apply if this filter is chosen.
To disable the all files filter
use
fileChooser.setAcceptAllFileFilterUsed(false);
and only if you are on jdk1.3 or greater since this is a private method in the JFileChooser in 1.2.2 .
Hope this helps,
regards,
Manish

Print to Art,Trim or Bleed Box without changing Crop Box

I understand that Acrobat is aware of the Art, Trim & Bleed boxes set from other applications (Indesign, Illustrator) when exporting to PDF. Is there a way to print only the content within one of these boxes without adjusting the dimensions of the document's Crop Box via Acrobat's "Set Pages Boxes" or "Crop Pages" dialog?
Thank you and have a great day,
Brandon Boswell

This method works, but unfortuantley you cannot save recolor artwork settings(atleast in CS5), to resue this method to save time. Posting this incase this helps.
Create cmyk global colors of slected artowrk by using swathces palette >> add selected colors
Manually create a tint swatch for you destination colors (32130 tints), by using color palette, slide tint over, then add new swatch for each one.
Edit >> Edit Colors >> Recolor Artwork >> Click on the smaller swatches on right to set a destination color for each
see belwo this worked

Urgt:How to identify TOP 5 SQL using more CPU time without using statspack

How to identify the TOP 5 SQL queries which are consuming more CPU time during the timespan of 24 hours for entire database. There are N number of users who have issued sql queries, out of which few users have disconnected and few user are still connected to the database(I need to consider all sessions). My database version is 9.0.1. I don't want to use statspack. Is there any way to identify TOP 5 SQL consuming more CPU time without affecting the performance of the database. Can any one help me on this? Its urgent!!. I don't want to use statspack becasue it degrades the performance and i cannot afford to run it for 24 hours.

You don't run statspack for 24 hours, that would infact be pointless...
Run statspack for say a 10 or 15 minute window during a particular "busy" period on your database. If you run it for longer then all the useful data will have been "averaged out". You want a snapshot in time, not an average over the day.

How to identify TOP 5 SQL consuming more CPU time without using statspack

How to identify the TOP 5 SQL queries which are consuming more CPU time during the timespan of 24 hours for entire database. There are N number of users who have issued sql queries, out of which few users have disconnected and few user are still connected to the database(I need to consider all sessions). My database version is 9.0.1. I don't want to use statspack. Is there any way to identify TOP 5 SQL consuming more CPU time without affecting the performance of the database. Can any one help me on this? Its urgent!!.

My database version is 9.0.1. I don't want
to use statspack. Is there any way to identify TOP 5
SQL consuming more CPU time without affecting the
performance of the database. Can any one help me on
this? Its urgent!!.I cant understand why you dont want to use statspack. As it is very easy to use and very quick to identify bottlenecks. Try using statspack. Its really wonderful.
Particularly in your case statspack is the best.
Regards,
Sanju.

Any idea when we will see units new out of the box without a scratch on iPhone 5?

Any idea when we will see units new out of the box without a scratch? I was out at Apple to pick up my iPhone 5 in black on Oct 12th. I opened the box in front of an Apple technician and there was a scratch on the edge. So I told her I didn't want a scratched iPhone. So she returned and brought out another phone. Well, she couldn't get it to a accept the new iPhone because there's a 24hr waiting period when you make a return. This is Verizon's policy, but of course we didn't find out until 2.5hrs later.
So she says you'll have to return but we will hold this phone for you. I was disappointed after being there for a total of 3.5hrs and no iPhone. I returned on Saturday hoping the next iPhone didn't have a scratch. I opened the box and there was a scratch! I live 40 minutes from these store, so it's not close.
I have an iPhone 4 that's in excellent condition! I don't want a new iPhone 5 with a scratch, unless its a scratch caused by me.

We're users here. Why would you ask a question here that no one can answer? Are you impaired in some way intellectually?

J2EE Processes using 25% CPU load without load

Hi
We are running a Portal cluster with 2 cluster application nodes with each 2 J2EE server processes and a dispatcher.
We experiences that after some time the J2EE server processes can start using typical 25% CPU without any load on the portal - after some time the load typically increase to approx. 50% CPU (still without user load) and the only "solution" is to restart the processes.
Anyone you have experienced a similar behaviour?
BR
Tom

Are you doing load balancing too somewhere?
I though I read somewhere about some replication between nodes that goes on. If they transfer their information and drop it, that is fine. But they don't. On the next round they exchange the new info and info from the last time. It just grows. Look at you DB server, check to see if one of the DB's grows with the CPU load.
The other thing is logging. I am a log freak myself but, sometimes I get into trouble by logging too much. Next time your CPU loads check *.log and temp logs, see if there are any over 10 gig.
Not that I never had one,
no,
never.

Clustering on multi cpu box without multicast

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