SUN IDM8 Performance question

I have deployed IDM8 on Sun Application Server 9.1 on RHEL 4.6 with Oracle 10gr2. All are on the same machine. I have given 1 GB each initial/max heap sizes. The performance seems to be horrible for a single user (e.g. configurator) just logging to IDM initial page -- 3-4 minutes. After then same thing for every item. This is a fresh install and almost no load is there. I see the machine has lots of free memory, no paging and CPU utilization is not more than 20%. Looked at garbage collection and that was going pretty fast. What may be the reason & how to fix it? Thanks.

One thing to keep in mind with Oracle is that immediately after a fresh install and new data population the indexes and statistics are out of sync with the data in the database. Those statistics help Oracle decide how to retrieve the data from the database. If the statistics are old then sometimes Oracle will make the wrong decision, for example chosing a full table scan over an index based look up.
Oracle will eventually rebuild those statistics (usually it's a job scheduled to run nightly but it depends on your config) but it might be worth asking your DBA to force them to be rebuilt.
Having said that, I'm personally not terribly impressed with the performance of either IDM 8.0 or IDM 7.1. The IDM application itself does not take advantage of multiple CPU cores so running it on a platform such as Sun's T1000/T2000 series servers does not help. It's far better to use a system with very fast CPUs but limited execution cores over a system with a ton of cores and slower CPUs. There's very little multi threading done within a single user's session.
On the back-end database side, IDM defines the schema to use and I think there could be some improvements there too. It took me a solid week of database tuning (along with using Oracle's query rewrite feature) just to get the performance up to an acceptable level.
One example I have is if you have a large number of users in a single organization (over 100k) and, as an admin, you try to expand that organization and page through the user list the system slows to a crawl. Each click to move to the next "page" of users takes minutes and since IDM remembers were you were in the account listing every time you return to the account tab there's a several minute delay. Since it's only on the admin side of things we're going to live with it. There's no way that type of a performance problem is solely related to the back-end database.
Anyway, I'll stop ranting. Rebuild your Oracle statistics and indexes. Something like "EXEC DBMS_STATS.gather_database_stats;" as the sys user will help but really you should talk to your DBA.
If you're not using a lot of CPU it likely means you're hitting the disk a ton. The second thing you might try doing in cranking up your JVM heap size or changing your garbage collection method. Here's what I use (I'll leave it up to you to look up the meaning of each of the command line options) for the jvm:
-server -XX:+DisableExplicitGC -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -Xms1024m -Xmx1024m -XX:SurvivorRatio=128 -XX:NewSize=300m -XX:MaxNewSize=300m -XX:MaxTenuringThreshold=0 -XX:CMSInitiatingOccupancyFraction=60
Edited by: MichaelF on Jul 8, 2008 9:40 AM

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http://forums.java.net/jive/thread.jspa?threadID=1636&tstart=0
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Hi Misha;
Since your question deals primarily with servers, I would suggest that if you reposted Mac OS X Server Forum where those most knowledgeable on servers hang out you stand a better chance of getting an answer.
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Simple performance question

Simple performance question. the simplest way possible, assume
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private void process(){
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for (int i=0;i<dimension1;i++)
for (int ii=0;ii<dimension1;ii++)
for (int iii=0;iii<dimension1;iii++)
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for (int i=0;i<dimension1;i++)
for (int ii=0;ii<dimension1;ii++)
for (int iii=0;iii<dimension1;iii++)
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erjoalgo wrote:
I guess my real question is, will the compiler optimize the condition check out when it realizes the boolean value will not change through these iterations, and if it does not, is it worth doing that micro optimization?Almost certainly not; the main reason being that
matrix[i][ii][iii][...] +/-= constantis liable to take many times longer than the condition check, and you can't avoid it. That said, Mel's suggestion is probably the best.
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Winston

BPM performance question

Guys,
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Your opinion is appreciated.
Thanks a lot,
Viktor Varga

Hi,
In SXMB_ADM you can set the time out higher for the sync processing.
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Make sure that your calling system does not have a timeout below that you set in XI otherwise yours will go on and finish and your partner may end up sending it twice
when you go for BPM the whole workflow
has to come into action so for example
when your mapping last < 1 sec without bpm
if you do it in a BPM the transformation step
can last 2 seconds + one second mapping...
(that's just an example)
so the workflow gives you many design possibilities
(brigde, error handling) but it can
slow down the process and if you have
thousands of messages the preformance
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http://help.sap.com/bp_bpmv130/Documentation/Operation/TuningGuide.pdf
http://help.sap.com/saphelp_nw04/helpdata/en/43/d92e428819da2ce10000000a1550b0/content.htm
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/xi/3.0/sap%20exchange%20infrastructure%20tuning%20guide%20xi%203.0.pdf
BPM Performance tuning
BPM Performance issue
BPM performance question
BPM performance- data aggregation persistance
Regards
Chilla..

Xcontrol: performance question (again)

Hello,
I've got a little performance question regarding xcontrols. I observed rather high cpu-load when using xcontrols. To investigate it further, I built a minimal xcontrol (boolean type) which only writes the received boolean-value to a display-element in it's facade (see attached example). When I use this xcontrol in a test-vi and write to it with a rate of 1000 booleans / second, I get a cpu-load of about 10%. When I write directly to a boolean display element instead of the xcontrol,I have a load of 0 to 1 %. The funny thing is, when I emulate the xcontrol functionality with a subvi, a subpanel and a queue (see example), I only have 0 to 1% cpu-load, too.
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Regards,
soranito
Message Edited by soranito on 04-04-2010 08:16 PM
Message Edited by soranito on 04-04-2010 08:18 PM
Attachments:
XControl_performance_test.zip ‏60 KB

soranito wrote:
Hello,
I've got a little performance question regarding xcontrols. I observed rather high cpu-load when using xcontrols. To investigate it further, I built a minimal xcontrol (boolean type) which only writes the received boolean-value to a display-element in it's facade (see attached example). When I use this xcontrol in a test-vi and write to it with a rate of 1000 booleans / second, I get a cpu-load of about 10%. When I write directly to a boolean display element instead of the xcontrol,I have a load of 0 to 1 %. The funny thing is, when I emulate the xcontrol functionality with a subvi, a subpanel and a queue (see example), I only have 0 to 1% cpu-load, too.
Okay, I think I understand question now. You want to know why an equivalent xcontrol boolean consumes 10x more CPU resource than the LV base package boolean?
Okay, try opening the project I replied yesterday. I don't have access to LV at my desk so let's try this. Open up your xcontrol facade.vi. Notice how I separated up your data event into two events? Go the data change vi event, when looping back the action, set the isDataChanged (part of the data change cluster) to FALSE. While the data input (the one displayed on your facade.vi front panel), set that isDataChanged to TRUE. This is will limit the number of times facade will be looping. It will not drop your CPU down from 10% to 0% but it should drop a little, just enough to give you a short term solution. If that doesn't work, just play around with the loopback statement. I can't remember the exact method.
Yeah, I agree xcontrol shouldn't be overconsuming system resource. I think xcontrol is still in its primitive form and I'm not sure if NI is planning on investing more times to bug fix or even enhance it. Imo, I don't think xcontrol is quite ready for primetime yet. Just too many issues that need improvement.
Message Edited by lavalava on 04-06-2010 03:34 PM

Sun ZFS Virtual Box Appliance - Performance question

Hope this is the right place to ask this question - apologies if it is not.
We are testing out the Sun ZFS storage using the handy Virtual Box Virtual Appliance.
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We are using the VB appliance to test a lab based OVM setup - and up to now, performance is too dire to even install a simple VM Guest or upload an ISO to a repository.
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Jeff,
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Hello there
The JDK offers several ways to copy arrays so I ran some experiments to try and find out which would be the fastest.
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Here are the results I obtained (click for full size): http://i.share.pho.to/dc40172a_l.png
(what I call in-place copy is just iterating through the array with a for loop and copying the values one by one)
I generated a graph from those values: http://i.share.pho.to/049e0f73_l.png
A zoom on the interesting part: http://i.share.pho.to/a9e9a6a4_l.png
According to these results, clone() becomes faster at some point (not sure why). I've re-ran these experiments a few times and it seems to always happen somewhere between 725 and 750.
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(just reminding I'm copying primitives, not objects)
Thanks!
Message was edited by: xStardust! Added links, mr forum decided to take away my images

yeh, everyone thinks that at some point. it relies,
however, on you being perfect and knowing everything
in advance, which you aren't, and don't (no offence,
the same applies to all of us!). time and time again,
people do this up-front and discover that what they
thought would be a bottleneck, isn't. plus,
the JVM is much smarter at optimizing code than you
think: trust it. the best way to get good performance
out of your code is to write simple, straightforward
good OO code. JVMs are at a point now where they can
optimize java to outperform equivalent C/C++ code
(no, really) but since they're written by human
beings, who have real deadlines and targets, the
optimizations that make it into a release are the
most common ones. just write your application, and
then see how it performs. trust me on this
have a read of
[url=http://java.sun.com/developer/technicalArticles/I
nterviews/goetz_qa.html]this for more info anda chance to see where I plagiarized that post from :-)
Thanks for that link you gave me :)
Was usefull to read.
About time and money of programming, that is not really an issue for me atm since i'm doing this project for a company, but through school (it's like working but not for money).
Of course it should not last entirely long but I got time to figure out alot of things.
For my next project I will try to focus some more on building first, optimizing performance later (if it can be done with a good margin, since it seems the biggest bottlenecks are not the code but things outside the code).
@promethuuzz
The idea was to put collection objects (an object that handles the orm objects initialized) in the request and pass them along to the jsp (this is all done through a customized mvc model).
So I wanted to see if this method was performance heavy so I won't end up writing the entire app and finding out halve of it is very performance heavy :)

Java Performance question...

Hi,
I am trying to find information/tips to help me improve overall Java and thread performance using j2sdk 1.4.2 or at least verify I am following good practices regarding performance. I have seen some articles that mention issues w/ synchronized elements, avoiding exception throwing, etc., I still have questions as to if and how the following afffect performance:
- yield() vs. sleep() vs. wait() (or none) for maximizing thread execution time/efficiency
- join() vs. wait() + isAlive()
- static vs. instance methods/data
- Running threads as classes that extend Thread vs. implement Runnable
- ... anything else I may be missing at the moment
Do any of these things even matter?
What about JVM command-line arguments and performance? Is there comprehensive explanation somewhere detailing all options and guidelines on what values to use?
It seems like all of this must have been written about/discussed before, but I haven't seen anything that helps pull it all together so I don't have to experiment with it myself (i.e., reinvent the wheel).

practices regarding performance. I have seen some
articles that mention issues w/ synchronized
elements, avoiding exception throwing, etc.,Take those with a grain of salt.
Sync: Try to keep your synchronized blocks short--get in and get out. This minimizes contention. But don't avoid syncing when you need it or convolute your code just because you think syncing will hurt performance.
Exceptions: If you're throwing so many exceptions that it's significantly hurting performance, you've got bad data, a stupid user, buggy code, a bad network, etc. Avoiding exceptions won't fix that. Throw an exception when it's called for. By definition it should be exceptional, so it won't have a big impact on overall performance.
I still
have questions as to if and how the following afffect
performance:None of the following choices would be made for performance reasons.
>
- yield() vs. sleep() vs. wait() (or none) for
maximizing thread execution time/efficiencyAll of the above serve different purposes. Choose the one that's right for what you're trying to accopmlish.
Yield is for when you want to explicitly give other threads a chance to run. There's no guarantee the will. I've never used it, and I think I've heard that it's rarely usefule and can actually hurt performance a bit, probably because you shouldn't try to outsmart the scheduler.
Sleep is for when you want your thread to stop executing for a certain amount of time.
Wait is for when you want your thread to stop executing until some external event tells it to go back to work.
- join() vs. wait() + isAlive()Join just says stop here until the thread in question exits. I can't think off the top of my head when you'd use wait() + isAlive(), but I doubt there's any performance reason to chose it over join() to accomplish the same task.
- static vs. instance methods/dataNo.
Use static members for things that apply to the class as a whole, and have no need to use or modify the state of a particular instance of the class. Use instance members for things that are related to specific instance--i.e. this Foo as opposed to that Foo. Absolutely DO NOT pick one or the other thinking you'll get better performance.
- Running threads as classes that extend Thread vs.
implement RunnableAre you modifying or adding to Thread's behavior? Almost certainly no. Therefore, your class IS-NOT-A Thread, so don't extend Thread. Implement Runnable. This has nothing to do with performance.
- ... anything else I may be missing at the moment
Do any of these things even matter?It sounds like you're falling into the premature optimization trap.
Use appropriate algorithms and data structures to get maximum performance. Don't futz around with little bitty tweaks that go against good OO or the nature of your design until and unless you have measured the time these sections of code are taking and have verified that they are bottlenecks.
>
What about JVM command-line arguments and
performance? Is there comprehensive explanation
somewhere detailing all options and guidelines on
what values to use? The main things that you tweak on the command line in this respect relate to GC, I think.
http://java.sun.com/docs/hotspot/

MBP with 27" Display performance question

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I just added a gorgeous LCD 24" to my MBP setup (the G5 is not Happy) The answer to your question is yes. Just go into Display Preferences and drag the menu bar over to the the 24 this will make the 24 the Primary Display and the MBP the secondary when connected.

Performance question about 11.1.2 forms at runtime

hi all,
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To give an example:
A wizard screen contains an image alongside a number of items to enter details. In 11.1.1.4 this screen shows up immediately. In 11.1.2 you see the image rolling out on the canvas whilst the properties of the items seem to be set during this event.
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The profile can't be changed although I suspect if there was an issue then banding the line would be something they could utilise if you were happy to do so.
It's all theoretical right now until you get the service installed. Don't forget there's over 600000 customers now on FTTC and only a very small percentage of them have faults. It might seem like lots looking on this forum but that's only because forums are where people tend to come to complain.
If you want to say thanks for a helpful answer,please click on the Ratings star on the left-hand side If the the reply answers your question then please mark as ’Mark as Accepted Solution’

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Hello.
I have a dual Xeon 2.6 computer with 3 GB of memory and 6 GB of cache, running RedHat EL 3 with Oracle AS 10g (9.0.4.0.0).
Application Server is used to run some applications created with forms, and it generates several reports, but the forms are also used as a front end to another Oracle Database (Oracle 7.0, runing in Sun Solaris 5.6).
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even in the clients, when running the forms application, the transition of the several menus is slow, and it used to be more fast.
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My users are really getting on my nervers and i cant do nothing, because they have reason...
any help would be appreciated !
Cheers
Bruno Santos

Bruno, did you solve the performance problem? I'm experiencing the same lack of speed.

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Following points may help:
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Regards,
Husnu Sensoy

Performance question

Which mapping is performance wise better, comparison between graphical, abap, java and XSLT mapping.
suppose when the mapping is simple which is better and when mapping is complex which is better.

Hi Srinu,
I thought i will start of from scratch.Mapping is basically done to convert one form of xml into another form. This can be done using either of them mentioned below.
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- XSLT mapping
- JAVA mapping
- ABAP mapping
There is no hard and fast rule for using the mapping techniques. But, I will try to put things in the right perspective for you.
Graphical Mapping is used for simple mapping cases. When, the logic for your mapping is simple and straight forward and it does not involve any complex logic.
Java and XSLT mapping are used when graphical mapping cannot help you.
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Java Mapping uses 2 types of parsers. DOM and SAX. DOM is easier to use with lots of classes to help you create nodes and elements, but , DOM is very processor intensive.
SAX parser is something that parses your XML one after the other, and so is not processor intensive. But, it is not exaclty easy to develop either.
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Graphical mapping
http://help.sap.com/saphelp_nw04/helpdata/en/6d/aadd3e6ecb1f39e10000000a114084/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/43/c4cdfc334824478090739c04c4a249/content.htm
/people/bhanu.thirumala/blog/2006/02/02/graphical-message-mapping-150-text-preview
http://www.sapgenie.com/netweaver/xi/mapping1.htm
/people/alessandro.guarneri/blog/2006/01/26/throwing-smart-exceptions-in-xi-graphical-mapping
XSLT mapping
http://help.sap.com/saphelp_nw04/helpdata/en/73/f61eea1741453eb8f794e150067930/content.htm
http://www.w3.org/TR/xslt20/
JAVA mapping
http://help.sap.com/saphelp_nw04/helpdata/en/e2/e13fcd80fe47768df001a558ed10b6/content.htm
http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html
ABAP mapping
/people/r.eijpe/blog
To know more about the value mapping tools for the SAP Exchange Infrastructure (XI), please go thru the following link:
http://www.applicon.dk/fileadmin/filer/XI_Tools/ValueMappingTool.pdf
To get an idea as to what value mapping is, please go thru the following links:
http://help.sap.com/saphelp_nw04/helpdata/en/13/ba20dd7beb14438bc7b04b5b6ca300/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/f2/dfae3d47afd652e10000000a114084/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/2a/9d2891cc976549a9ad9f81e9b8db25/content.htm
most of the links that I have provided also helps you get the step by step procedure of doing the same. And also involves the procedure to implement certain advanced features.
And please go through this link which clearly explains the types of mappings.
/people/ravikumar.allampallam/blog/2005/02/10/different-types-of-mapping-in-xi
Hope this clears your doubt fully.
Regards,
Abhy

Editing stills with motion effects, performance questions.

I am editing a video in FCE that consists solely of still photos.
I am creating motion effects (pans and pullbacks, etc) and dissolve
transitions, and overlaying titles. It will be played back on dvd
on a 16:9 monitor (standard dvd,not blueray hi-def). Some questions:
What is the FCE best setup to use for best image quality: DV-NTSC?
DV-NTSC Anamorphic? or is it HDV-1080i or 720p30 even though it
won't be played back as hi-def?
How do best avoid squiggly line problem with pan moves etc?
On my G-5, 2gb RAM, single processor machine I seem to be having
performance problems with playback: slow to render, dropping frames, etc
Thanks for any help!

Excellent summary MacDLS, thanks for the contribution.
A lot of the photos I've taken on my camera are 3072 X 2304 (resolution 314) .jpegs.
I've heard it said that jpegs aren't the best format for Motion, since they're a compressed format.
If you're happy with the jpegs, Motion will be, too.
My typical project could either be 1280 X 720 or SD. I like the photo to be a lot bigger than the
canvas size, so I have room to do crops and grows, and the like. Is there a maximum dimension
that I should be working with?
Yes and no. Your originals are 7,000,000 pixels. Your video working space only displays about 950,000 pixels at any single instant.
At that project size, your stills are almost 700% larger than the frame. This will tax any system as you add more stills. 150% is more realistic in terms of processing overhead and I try to only import HUGE images that I know are going to be tightly cropped by zooming in. You need to understand that an 1300x800 section of your original is as far as you can zoom in , the pixels will be 100% in size. If you zoom in further, all you get are bigger pixels. The trade off you make is that if you zoom way out on your source image, you've thrown away 75% of its content to scale it to fit the video format; you lose much much more if you go to SD.
Finally, the manual says that d.p.i doesn't matter in Motion, so does this mean that it's worth
actually exporting my 300 dpi photos to 72 dpi before working with them in Motion?
Don't confuse DPI with resolution. Your video screen will only show about 900,000 pixels in HD and about 350,000 pixels in SD totally regardless of how many pixels there are in your original.
bogiesan

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