Very Odd Performance Issues

When I start up my iMac, Safari and other Apple apps that access the Internet work fine. But after a few minutes of use Safari stops loading new web pages, Mail can't receive mail, I can't connect to iTunes and I can't connect to the App Store. HOWEVER, Skype and FaceTime work fine. The only fix is to restart the computer and then I only have things working for a couple of minutes before the problem reoccurs. I have run a virus scanner which found no problem.
any idea what might be causing this bizarre behavior? Thanks in advance.

Identifying the third party system modifications that may be responsible for the behavior you describe is a process of elimination, but if you don't know where to start EtreCheck can help with that:
Apple Support Communities contributor etresoft wrote a very useful app to quickly gather certain system information that may help point to a cause of this problem. Read about it here. It contains a link to download EtreCheck. Do not download it from anywhere else (such as may be found by following the results of an Internet search).
Run EtreCheck after starting your Mac normally (not in Safe Mode). It will take a moment to run as it collects its data.
Copy and paste its output in a reply. Use its "Copy report to clipboard" button.
Do not be concerned about anything that says "Problem" or “failed” or anything else that may appear in red. Those attention-getters don't necessarily indicate anything wrong.
EtreCheck was designed to remove any personal information (such as your computer's name and serial numbers) but if you see anything that looks like an email address or any other personal information that should not be divulged to others, please delete or obscure that information when you post the reply.
When you are finished with EtreCheck, quit the program. It occupies very little space, and you can keep it or drag it to the Trash as you wish.

Similar Messages

After Effects CS5.5 - Very Serious Performance Issues w/RAM Preview

My system: Windows 7 Professional, two Intel Xeon X5650's, 12GB RAM, and a NVIDIA Quadro FX 4800.
Problem: RAM Preview in CS5.5 gives me less than 2 fps (yes---two frames per second). This is even with the most simple of compositions. I created a 1080p 23.976 project with two simple solid layers and keyframed position and scale values for one of them with no other effects on either solid. RAM Preview gives me 1.8 fps.
I still have AE CS5 installed and it gives me solid, predictable results with RAM Preview. When I create a similar test project inside CS5, it creates the RAM preview almost instantly and displays in proper realtime (23.976 fps).
My settings for both CS5 and CS5.5 are similar (and I have tried many variations in my attempt to fix this problem).
PREVIEWS
Fast Previews: Adaptive Resolution Limit 1/4
Enabled OpenGL and both sub-options for OpenGL enabled.
MEMORY & MULTIPROCESSING
RAM reserved for other apps: 4GB
I have tried various settings for Multiprocessing, all of which results in the same less-than-2 fps RAM Previews. Currently I have MP'ing enabled with 1.5GB allocation per background CPU and the actual CPU's used is 4. Again, no matter what I set it to, I get the same performance issue.
On my screen magnification ratio setting, I am using 25% and my Resolution/Down Sample is set to quarter. On my preview tab, I have tried setting my resolution from the default of "Auto" to "Quarter" with no difference.
In summary: On the same machine, AE CS5.5 RAM Preview offers terrible performance; CS5 RAM Preview offers great performance.

Under AJA Preview there are check boxes, one for "Video" and the other for "Preview." I've checked and unchecked them both and I'm still getting poor RAM previews. No matter what I have toggled, I seem to get between 1 and 2 fps for my RAM Previews.
I am not currently using the AJA card for anything. I will consider uninstalling it if this might possibly solve my problem. It's just a hassle to install and uninstall cards on a per need basis.
If there are any other thoughts, I'd love to hear them. At this point, I'd do just about anything to have realtime previews back.
The machine I'm using, by the way, is an HP z800 with Windows 7 Professional, two Intel Xeon X5650's, 12GB RAM, and a NVIDIA Quadro FX 4800. It has the following installed: CS5.5 Production Premium, AVID Media Composer 5.5.2, and AVID DS 10.5.1 (among other programs).

Very strange performance issue

Hi!
I've got a very very strange performance problem and I have no more ideas what it might be:
The following code fragment contains the useless line int count=0;
However, deleting the line reduces(!) the execution speed of the program by ~30%. This is not only weird because the line is absolutely useless, but also because the whole function only takes <1% total execution time in the program.
    public void simuliere_bis_soll_erreicht()
        int count=0; //????
        while(welt.soll_simulationszeit>welt.ist_simulationszeit && simu_active)
            simuliere_einen_schritt();
    }The problem occurs both under Java 1.5 and 1.4.2, using the HotSpot-Client.
Cleaning and rebuilding the project does not help.
It occurs on different computers in the same way, too.
Thank you very much in advance! :-)
Mirko Seithe

well, this is what you get:
1.) run totally interpreted since compilation threshhold is reached (1500 (client jvm) - 10000 (server-jvm)
2.) start background compilation, run further in interpreted mode till compilation finishes (depends on code, but about 1000-10000)
3.) run compiled code
so this is what you get:
~20.000 invokations interpreted (about 70-90%n of total time)
~80.000 invokations compiled (30-10% of total time)
maybe your int takes much longer to optimize, so the loop executes much longer in interpreted code.
I would not bet on such microbenchmarks, since they do not tell you real stories under real circumstances. Believe me, I am the programmer working on performance optimizations in the company I am employed.
lg Clemens

Very odd Airport issue airport has a mind of its own...

Ok so hopefully I have gotten your attention. As of 3 days ago my Macbook Pro (which has always connected to the internet through my Airport Extreme with the signal boosted by an Airport Express) so I am online reading email when I attempt to open a new page and my internet dies. I look at my other computer (Macbook not pro) sitting next to me and it is connected to the network just fine. So I go to connect to the internet again and I can see my network and yet every time I try to connect I get a message saying "error couldnt connect" or something similar to that. Then I went to make sure my settings werent changed and they weren't. So I ran a diagnostic to make sure that nothing was wrong settings-wise. And when I get to the step where I need to choose the network I want to connect to it asks for my password (been using same one for years) and I input it and it tells me the password is incorrect. Then I try it again, and again im told the password is incorrect, no caps are on im spelling it right, basically I am faultless. Then after a number of restarts and frustrated hours, out of nowhere it connects again.
So then two nights ago I am online I pick up my laptop from my bed and walk to the room next door and start to use my computer in the next room to show a friend something. I walk back into my room with the laptop and 8 minutes later the same internet issue occurs again. I try everything, the password isnt accepted anymore and then a couple of hours later it works.
So then tonight I am writing a paper and the same stupid thing happens again. This time after 3 restarts I get back online but it is still very very frustrating and I have no clue what is wrong
If anyone has any advice PLEASE im all ears

Welcome to the discussions!
The fact that things improved a bit with Interference Robustness is probably a major clue that you are experiencing wireless interference issues at your new location.
The most common cause of interference problems in a home are cordless phones, which typically operate at the same frequency as wireless networks. You need to power off the phones and their base stations / cradles for a few hours to see if you notice any improvement in the performance of your wireless network. If you do, you need to try different positions for the phones.
Please post back on your findings to take the next possible steps in identifying the probable interference issue there.

Very odd internet issues.

I just bought a 21.5" refurbed iMac. Worked great for a week and now for the past week or so, I cannot stay connected to either Firefox or Safari for more than 2 minutes before the browser starts "Looking up" the website and then it completely disconnects. I go into the network diagnostics while this is happening and I see that Internet and Server have orange dots next to them, then after a little while those dots turn red along with ISP's dot. I called my ISP yesterday and they said that everything on their end is good. I believe them because, I had been playing WoW and Warhammer Online since I got the computer and have played for up to three hours at a time, and I never had any disconnects or lag form the games at all. I even connected to WoW while my browser's connection was tanking to see if I could connect and I did just fine with no lag or disconnects. I even pinged some websites while this was going on and that worked as normal. Probably the oddest thing of all this, is that if I go straight from my cable modem to my computer I get absolutely no internet at all. I can only go through my router to get connected. I did call Apple about this and the only thing they came up with was for me to delete these com.apple.safari, and com.apple.mozilla files, but that didn't work. So, now I'm at a loss of what to do. I've restored my router back to factory settings and downloaded an update for it, played with IP addresses and DNS addresses and nothing is working out. With each day that passes the connection times to my browsers get less and less. My router is a Netgear WGR614 v.5 btw. This all seems to happen when I just go wireless with the iMac also. If there's anybody out there that can help it would be greatly appreciated.
TLDR: Internet browsers don't stay connected to internet, but I can play online games, and ping websites with no issues. Modem straight to computer does not work, have to go through router to connect. Called ISP and called Apple, but no solutions have helped.

Based on which device is configured to negotiate the internet connection with his ISP this is to be expected. For example, if his router were programmed to negotiate through the modem and establish the external IP and also negotiate with all the devices on his LAN and assign the internal IPs, then his Mac is only configured to get its internal IP from the router.
So, if he removes the router from the setup, then he would need to reconfigure the Mac to now negotiate directly with his ISP for its internet connection.
He does not mention having done any of that in his post. So an explanation of how the home LAN is setup and each device configured would be helpful in understanding what may be going wrong.
Dah•veed

Very odd battery issue

I am having an issue with my phone where it tells me my battery is dead when it's really not
I could have say 40%~50% of battery life, take my phone out of my pocket, press the home button... Nothing, then go to hold down the power button and get the dead battery screen (the screen that shows the battery and blinking red line with the USB plug below it), issue is, the battery isn't really dead, when I plug it in, it springs to life right away, displaying it's actual battery percentage, and it works fine if I unplug it right after it boots, proving the battery isn't dead
Sometimes when I try booting it again, I can get it running again without plugging it in, this doesn't always happen though
Any reason why I would be getting the dead battery screen when my battery isn't dead?
I am updated to the latest iOS, so I know that is not the issue
I have an iPhone 5 if that matters

Try restoring the iOS, as described here:
http://support.apple.com/kb/ht1414
I would recommend you NOT restore from backup when finished, rather just sync your content back to the phone.

Very odd HDD issues on X38 Plat.

Hey Guys, I just upgraded to an X38 Platinum, specs:
XP Prof. 32bit
X38 Platinum, BIOS 1.1
Q6600 Core2 Quad, 2.4ghz stock : CoolIT Eliminator
Aenon DDR3 2GB
VisionTek 3870
X-Fi XtremeMusic
PC Power & Cooling 750 Silencer Quad (Single rail 12v design)
WD 74GB Raptor
WD 500GB Caviar
So, here's a basic summary of what happens. I put all of my old stuff on the 500gb drive and reformatted the raptor so that I could hold on to my music etc. Now when I try to move things back, I can't. It copies fine, but cut/pasting gets no response from the operating system. An icon might show up in the destination folder, but it is a corrupted file and can't be accessed.
I can access each drive, and write to each drive.
When I turn on the computer, it takes a few trips through the boot cycle before it finally gets into windows. usually at the ATA stage (right after post) it says "No Hard Disk Detected!" and goes back to the logo.
This kind of funny HDD behavior has been happening since I put in the new mobo. When I was reinstalling windows, for example, it hit a few places where it just got stuck and wasn't doing any HDD activity at all during set up, and I had to restart to get it to going.
The Raptor, which has the OS on it, is in the first SATA slot, and the Caviar in the second. There is a CD/DVD drive in the 4th...
I'm truly stumped on this one, I have no idea what it could be! As always, any help is appreciated
Sorry for my ineloquence, I've been awake for far too long the past two days.
Thanks again,
ivy

Quote from: ivybat on 07-February-08, 11:56:41
So far, none! :thumbsup:
Well, the original problem is that I can't cut and paste across drives, only copy then delete... and I still can't do that. It doesn't make any sense!
"So far, none! :thumbsup:"
Nice , well the tips are suppose to help with BSOD(not with other problem.)
"Well, the original problem is that I can't cut and paste across drives, only copy then delete... and I still can't do that. It doesn't make any sense!"
That looks like permission problem.
Have you tried to log-in with administrator account and retest?

Serious Performance issue in ADF?

Hi Everyone,
My Jdev version is 11.1.2.3.0.
I have developed one ADF application and deployed into web logic server.
I am accessing this page through url in one portal of client.
After clicking on the page link in portal it opens the page and the page has search page(test field, submitbutton and result table).
On clicking on submit button sometimes the result in the table comes in few seconds and sometimes it takes few minutes.
its a very serious performance issue.
What should i do to increase performance for my ADF page?
why it takes much time sometimes?
Please give suggestions.
Thanks.

Hi Kumar,
Try to ensure proper indexes are placed based on search criteria in base table which will definitely increase the performance. Be sure to check the explain plan to see the performance of query instead of just running it in toad. If you feel everything is good from back end, you can tune your view object, go to view object editor->tuning and set the page range size=25 or some smaller value and see if that increases the performance.
Refer below link for more guidelines:
http://docs.oracle.com/cd/E17904_01/core.1111/e10108/adf.htm
Regards,
Ravi Nuka

While creating Billing, system is very slow..performance issue

Hi,
While creating Billing, system is very slow. How can I debugg and provide the analysis where is the exact problem.
This is showing performance issue.
Waiting for kind response.
Best Regards,
Padhy
Moderator Message : Duplicate post locked.
Edited by: Vinod Kumar on May 12, 2011 10:59 AM

hi,
Chk the links
http://help.sap.com/saphelp_nw04/helpdata/en/4a/e71f39488fee0ce10000000a114084/content.htm
Re: How to create Secondary Index?
How may secondary indices I can create on the ODS?
Deletion of ODS index
Ramesh

ATPO Check and performance Issue

Hi All
We had performance issues for ATP check from R/3 to APO and while we asked SAP for help SAP responded saying the data volume for table TTSTR is high and we need to delete unnecessary data by running report -/SAPAPO/SCHED_DELETE_TSTRS and ZZSTRDELE. After running these two reports in test environment we found the data volume has reduced to 96 records from 105000 records. We asked SAP to know whether this is safe to run this and got response that we need to be carefull while running these as data is permanently deleted by this
Can anybody tell whether its completely safe to run these two reports or we may delete genuine Time Streams by running these?
Regards
Mridul

Mridul,
It seems very odd that you would open a dialogue with SAP, and then when you needed further information about their proposal, you didn't go back and ask them the question you have now posted here.
Although I have only run this report a couple of times, I have never had any problem running report /SAPAPO/SCHED_DELETE_TSTRS For more info, refer to their supporting note.
https://service.sap.com/sap/support/notes/1254606
I can't comment on report ZZSTRDELE, since I have never heard of it, nor does it exist in any APO system I am currently working on.
If you have doubts about SAP's recommendations, I suggest you go back to your message and respond to their last reply, or if the old message is closed, raise a new message. That's what you pay your support money for.
Best Regards,
DB49

Interested by performance issue ? Read this ! If you can explain, you're a master Jedi !

This is the question we will try to answer...
What si the bottle neck (hardware) of Adobe Premiere Pro CS6
I used PPBM5 as a benchmark testing template.
All the data and log as been collected using performance counter
First of all, describe my computer...
Operating System
Microsoft Windows 8 Pro 64-bit
CPU
Intel Xeon E5 2687W @ 3.10GHz
Sandy Bridge-EP/EX 32nm Technology
RAM
Corsair Dominator Platinum 64.0 GB DDR3
Motherboard
EVGA Corporation Classified SR-X
Graphics
PNY Nvidia Quadro 6000
EVGA Nvidia GTX 680 // Yes, I created bench stats for both card
Hard Drives
16.0GB Romex RAMDISK (RAID)
556GB LSI MegaRAID 9260-8i SATA3 6GB/s 5 disks with Fastpath Chip Installed (RAID 0)
I have other RAID installed, but not relevant for the present post...
PSU
Cosair 1000 Watts
After many days of tests, I wanna share my results with community and comment them.
CPU Introduction
I tested my cpu and pushed it at maximum speed to understand where is the limit, can I reach this limit and I've logged precisely all result in graph (See pictures 1).
Intro : I tested my E5-XEON 2687W (8 Cores Hyperthread - 16 threads) to know if programs can use the maximum of it. I used Prime 95 to get the result. // I know this seem to be ordinary, but you will understand soon...
The result : Yes, I can get 100% of my CPU with 1 program using 20 threads in parallel. The CPU gives everything it can !
Comment : I put 3 IO (cpu, disk, ram) on the graph of my computer during the test...
(picture 1)
Disk Introduction
I tested my disk and pushed it at maximum speed to understand where is the limit and I've logged precisely all result in graph (See pictures 2).
Intro : I tested my RAID 0 556GB (LSI MegaRAID 9260-8i SATA3 6GB/s 5 disks with Fastpath Chip Installed) to know if I can reach the maximum % disk usage (0% idle Time)
The result : As you can see in picture 2, yes, I can get the max of my drive at ~ 1.2 Gb/sec read/write steady !
Comment : I put 3 IO (cpu, disk, ram) on the graph of my computer during the test to see the impact of transfering many Go of data during ~10 sec...
(picture 2)
Now, I know my limits ! It's time to enter deeper in the subject !
PPBM5 (H.264) Result
I rendered the sequence (H.264) using Adobe Media Encoder.
The result :
My CPU is not used at 100%, the turn around 50%
My Disk is totally idle !
All the process usage are idle except process of (Adobe Media Encoder)
The transfert rate seem to be a wave (up and down). Probably caused by (Encrypt time.... write.... Encrypt time.... write...) // It's ok, ~5Mb/sec during transfert rate !
CPU Power management give 100% of clock to CPU during the encoding process (it's ok, the clock is stable during process).
RAM, more than enough ! 39 Go RAM free after the test ! // Excellent
~65 thread opened by Adobe Media Encoder (Good, thread is the sign that program try to using many cores !)
GPU Load on card seem to be a wave also ! (up and down) ~40% usage of GPU during the process of encoding.
GPU Ram get 1.2Go of RAM (But with GTX 680, no problem and Quadro 6000 with 6 GB RAM, no problem !)
Comment/Question : CPU is free (50%), disks are free (99%), GPU is free (60%), RAM is free (62%), my computer is not pushed at limit during the encoding process. Why ???? Is there some time delay in the encoding process ?
Other : Quadro 6000 & GTX 680 gives the same result !
(picture 3)
PPBM5 (Disk Test) Result (RAID LSI)
I rendered the sequence (Disk Test) using Adobe Media Encoder on my RAID 0 LSI disk.
The result :
My CPU is not used at 100%
My Disk wave and wave again, but far far from the limit !
All the process usage are idle except process of (Adobe Media Encoder)
The transfert rate wave and wave again (up and down). Probably caused by (Buffering time.... write.... Buffering time.... write...) // It's ok, ~375Mb/sec peak during transfert rate ! Easy !
CPU Power management give 100% of clock to CPU during the encoding process (it's ok, the clock is stable during process).
RAM, more than enough ! 40.5 Go RAM free after the test ! // Excellent
~48 thread opened by Adobe Media Encoder (Good, thread is the sign that program try to using many cores !)
GPU Load on card = 0 (This kind of encoding is GPU irrelevant)
GPU Ram get 400Mb of RAM (No usage for encoding)
Comment/Question : CPU is free (65%), disks are free (60%), GPU is free (100%), RAM is free (63%), my computer is not pushed at limit during the encoding process. Why ???? Is there some time delay in the encoding process ?
(picture 4)
PPBM5 (Disk Test) Result (Direct in RAMDrive)
I rendered the same sequence (Disk Test) using Adobe Media Encoder directly in my RamDrive
Comment/Question : Look at the transfert rate under (picture 5). It's exactly the same speed than with my RAID 0 LSI controller. Impossible ! Look in the same picture the transfert rate I can reach with the ramdrive (> 3.0 Gb/sec steady) and I don't go under 30% of disk usage. CPU is idle (70%), Disk is idle (100%), GPU is idle (100%) and RAM is free (63%). // This kind of results let me REALLY confused. It's smell bug and big problem with hardware and IO usage in CS6 !
(picture 5)
PPBM5 (MPEG-DVD) Result
I rendered the sequence (MPEG-DVD) using Adobe Media Encoder.
The result :
My CPU is not used at 100%
My Disk is totally idle !
All the process usage are idle except process of (Adobe Media Encoder)
The transfert rate wave and wave again (up and down). Probably caused by (Encoding time.... write.... Encoding time.... write...) // It's ok, ~2Mb/sec during transfert rate ! Real Joke !
CPU Power management give 100% of clock to CPU during the encoding process (it's ok, the clock is stable during process).
RAM, more than enough ! 40 Go RAM free after the test ! // Excellent
~80 thread opened by Adobe Media Encoder (Lot of thread, but it's ok in multi-thread apps!)
GPU Load on card = 100 (This use the maximum of my GPU)
GPU Ram get 1Gb of RAM
Comment/Question : CPU is free (70%), disks are free (98%), GPU is loaded (MAX), RAM is free (63%), my computer is pushed at limit during the encoding process for GPU only. Now, for this kind of encoding, the speed limit is affected by the slower IO (Video Card GPU)
Other : Quadro 6000 is slower than GTX 680 for this kind of encoding (~20 s slower than GTX).
(picture 6)
Encoding single clip FULL HD AVCHD to H.264 Result (Premiere Pro CS6)
You can look the result in the picture.
Comment/Question : CPU is free (55%), disks are free (99%), GPU is free (90%), RAM is free (65%), my computer is not pushed at limit during the encoding process. Why ???? Adobe Premiere seem to have some bug with thread management. My hardware is idle ! I understand AVCHD can be very difficult to decode, but where is the waste ? My computer want, but the software not !
(picture 7)
Render composition using 3D Raytracer in After Effects CS6
You can look the result in the picture.
Comment : GPU seems to be the bottle neck when using After Effects. CPU is free (99%), Disks are free (98%), Memory is free (60%) and it depend of the setting and type of project.
Other : Quadro 6000 & GTX 680 gives the same result in time for rendering the composition.
(picture 8)
Conclusion
There is nothing you can do (I thing) with CS6 to get better performance actually. GTX 680 is the best (Consumer grade card) and the Quadro 6000 is the best (Profressional card). Both of card give really similar result (I will probably return my GTX 680 since I not really get any better performance). I not used Tesla card with my Quadro, but actually, both, Premiere Pro & After Effects doesn't use multi GPU. I tried to used both card together (GTX & Quadro), but After Effects gives priority to the slower card (In this case, the GTX 680)
Premiere Pro, I'm speechless ! Premiere Pro is not able to get max performance of my computer. Not just 10% or 20%, but average 60%. I'm a programmor, multi-threadling apps are difficult to manage and I can understand Adobe's programmor. But actually, if anybody have comment about this post, tricks or any kind of solution, you can comment this post. It's seem to be a bug...
Thank you.

Patrick,
I can't explain everything, but let me give you some background as I understand it.
The first issue is that CS6 has a far less efficient internal buffering or caching system than CS5/5.5. That is why the MPEG encoding in CS6 is roughly 2-3 times slower than the same test with CS5. There is some 'under-the-hood' processing going on that causes this significant performance loss.
The second issue is that AME does not handle regular memory and inter-process memory very well. I have described this here: Latest News
As to your test results, there are some other noteworthy things to mention. 3D Ray tracing in AE is not very good in using all CUDA cores. In fact it is lousy, it only uses very few cores and the threading is pretty bad and does not use the video card's capabilities effectively. Whether that is a driver issue with nVidia or an Adobe issue, I don't know, but whichever way you turn it, the end result is disappointing.
The overhead AME carries in our tests is something we are looking into and the next test will only use direct export and no longer the AME queue, to avoid some of the problems you saw. That entails other problems for us, since we lose the capability to check encoding logs, but a solution is in the works.
You see very low GPU usage during the H.264 test, since there are only very few accelerated parts in the timeline, in contrast to the MPEG2-DVD test, where there is rescaling going on and that is CUDA accelerated. The disk I/O test suffers from the problems mentioned above and is the reason that my own Disk I/O results are only 33 seconds with the current test, but when I extend the duration of that timeline to 3 hours, the direct export method gives me 22 seconds, although the amount of data to be written, 37,092 MB has increased threefold. An effective write speed of 1,686 MB/s.
There are a number of performance issues with CS6 that Adobe is aware of, but whether they can be solved and in what time, I haven't the faintest idea.
Just my $ 0.02

RE: Case 59063: performance issues w/ C TLIB and Forte3M

Hi James,
Could you give me a call, I am at my desk.
I had meetings all day and couldn't respond to your calls earlier.
-----Original Message-----
From: James Min [mailto:jminbrio.forte.com]
Sent: Thursday, March 30, 2000 2:50 PM
To: Sharma, Sandeep; Pyatetskiy, Alexander
Cc: sophiaforte.com; kenlforte.com; Tenerelli, Mike
Subject: Re: Case 59063: performance issues w/ C TLIB and Forte 3M
Hello,
I just want to reiterate that we are very committed to working on
this issue, and that our goal is to find out the root of the problem. But
first I'd like to narrow down the avenues by process of elimination.
Open Cursor is something that is commonly used in today's RDBMS. I
know that you must test your query in ISQL using some kind of execute
immediate, but Sybase should be able to handle an open cursor. I was
wondering if your Sybase expert commented on the fact that the server is
not responding to commonly used command like 'open cursor'. According to
our developer, we are merely following the API from Sybase, and open cursor
is not something that particularly slows down a query for several minutes
(except maybe the very first time). The logs show that Forte is waiting for
a status from the DB server. Actually, using prepared statements and open
cursor ends up being more efficient in the long run.
Some questions:
1) Have you tried to do a prepared statement with open cursor in your ISQL
session? If so, did it have the same slowness?
2) How big is the table you are querying? How many rows are there? How many
are returned?
3) When there is a hang in Forte, is there disk-spinning or CPU usage in
the database server side? On the Forte side? Absolutely no activity at all?
We actually have a Sybase set-up here, and if you wish, we could test out
your database and Forte PEX here. Since your queries seems to be running
off of only one table, this might be the best option, as we could look at
everything here, in house. To do this:
a) BCP out the data into a flat file. (character format to make it portable)
b) we need a script to create the table and indexes.
c) the Forte PEX file of the app to test this out.
d) the SQL staement that you issue in ISQL for comparison.
If the situation warrants, we can give a concrete example of
possible errors/bugs to a developer. Dial-in is still an option, but to be
able to look at the TOOL code, database setup, etc. without the limitations
of dial-up may be faster and more efficient. Please let me know if you can
provide this, as well as the answers to the above questions, or if you have
any questions.
Regards,
At 08:05 AM 3/30/00 -0500, Sharma, Sandeep wrote:
James, Ken:
FYI, see attached response from our Sybase expert, Dani Sasmita. She has
already tried what you suggested and results are enclosed.
++
Sandeep
-----Original Message-----
From: SASMITA, DANIAR
Sent: Wednesday, March 29, 2000 6:43 PM
To: Pyatetskiy, Alexander
Cc: Sharma, Sandeep; Tenerelli, Mike
Subject: Re: FW: Case 59063: Select using LIKE has performance
issues
w/ CTLIB and Forte 3M
We did that trick already.
When it is hanging, I can see what is doing.
It is doing OPEN CURSOR. But not clear the exact statement of the cursor
it is trying to open.
When we run the query directly to Sybase, not using Forte, it is clearly
not opening any cursor.
And running it directly to Sybase many times, the response is always
consistently fast.
It is just when the query runs from Forte to Sybase, it opens a cursor.
But again, in the Forte code, Alex is not using any cursor.
In trying to capture the query,we even tried to audit any statementcoming
to Sybase. Same thing, just open cursor. No cursor declaration anywhere.==============================================
James Min
Technical Support Engineer - Forte Tools
Sun Microsystems, Inc.
1800 Harrison St., 17th Fl.
Oakland, CA 94612
james.minsun.com
510.869.2056
==============================================
Support Hotline: 510-451-5400
CUSTOMERS open a NEW CASE with Technical Support:
http://www.forte.com/support/case_entry.html
CUSTOMERS view your cases and enter follow-up transactions:
http://www.forte.com/support/view_calls.html

Earthlink wrote:
Contrary to my understanding, the <font face="courier">with_pipeline</font> procedure runs 6 time slower than the legacy <font face="courier">no_pipeline</font> procedure. Am I missing something? Well, we're missing a lot here.
Like:
- a database version
- how did you test
- what data do you have, how is it distributed, indexed
and so on.
If you want to find out what's going on then use a TRACE with wait events.
All nessecary steps are explained in these threads:
HOW TO: Post a SQL statement tuning request - template posting
http://oracle-randolf.blogspot.com/2009/02/basic-sql-statement-performance.html
Another nice one is RUNSTATS:
http://asktom.oracle.com/pls/asktom/ASKTOM.download_file?p_file=6551378329289980701

IOS 8.1+ Performance Issue

Hello,
I encountered a serious performance bug in Adobe Air iOS application on devices running iOS 8.1 or later. Approximately in 1-2 minutes fps drops to 7 or lower without interacting with the app. This is very noticeable in the app. The app looks like frozen for about 0.5 seconds. The bug doesn't appear on every session.
Devices tested: iPad Mini iOS 8.1.1, iPhone 6 iOS 8.2. iPod Touch 4 iOS 6 is working correctly.
Air SDK versions: 15 and 17 tested.
I can track the bug using Adobe Scout. There is a noticeable spike on frame time 1.16. Framerate drops to 7.0. The App spends much time on function Runtime overhead. Sometimes the top activity is Running AS3 attached to frame or Waiting For Next Frame instead of Runtime overhead.
The bug can be reproduced on an empty application having a one bitmap on stage. Open the app and wait for two minutes and the bug should appear. If not, just close and relaunch the app.
Bugbase link: Bug#3965160 - iOS 8.1+ Performance Issue
Miska Savela

Hi
Id already activated Messages and entered the 6 digit code I was presented with into my iPhone. I can receive txt messages from non iOS users on my iMac and can reply to those messages.
I just can't send a new message from scratch to a non iOS user :-s
Thanks
Baz

Performance issues with LOV bindings in 3-tier BC4J architecture

We are running BC4J and JClient (Jdeveloper 9.0.3.4/9iAS 9.0.2) in a 3-tier architecture, and have problems with the performance.
One of our problems are comboboxes with LOV bindings. The view objects that provides data for the LOV bindings contains simple queries from tables with only 4-10 rows, and there are no view links or entity objects to these views.
To create the LOV binding and to set the model for the combobox takes about 1 second for each combobox.
We have tried most of tips in http://otn.oracle.com/products/jdev/tips/muench/jclientperf/index.html, but they do not seem to help on our problem.
The performance is OK (if not great) when the same code is running as 2-tier.
Does anyone have any good suggestions?

I can recommend that you look at the following two bugs in Metalink: Bug 2640945 and Bug 3621502
They are related to the disabling of the TCP socket-level acknowledgement which slows down remote communications for EJB components using ORMI (the protocol used by Oracle OC4J) to communicate between remote EJB client and server.
A BC4J Application Module deployed as an EJB suffers this same network latency penalty due to the TCP acknowledgement.
A customer sent me information (that you'll see there as a part of Bug# 3621502) like this on a related issue:
We found our application runs very slow in 3-Tier mode (JClient, BC4J deployed
as EJB Session Bean on 9iAS server 9.0.2 enterprise edition). We spent a lot
of time to tune up our codes but that helped very little. Eventually, we found
the problem seemed to happen on TCP level. There is a 200ms delay in TCP
level. After we read some documents about Nagle Algorithm, we disabled a
registry key (TcpDelAckTicks) in windows2000 on both client and server. This
makes our program a lot faster.
Anyway, we think we should provide our clients a better solution other than
changing windows registry for them, for example, there may be a way to disable
that Nagle's algorithm through java.net.Socket.setTcpNoDelay(true), in BC4J,
or anywhere in our codes. We have not figured out yet.
Bug 2640945 was fixed in Oracle Application Server 10g (v9.0.4) and it now disables this TCP Acknowledgement on the server side in that release. In the BugDB, I see backport patches available for earlier 9.0.3 and 9.0.2 releases of IAS as well.
Bug 3621502 is requesting that that same disabling also be performed on the client side by the ORMI code. I have received a test patch from development to try out, but haven't had the chance yet.
The customer's workaround in the interim was to disable this TCP Acknowledgement at the OS level by modifying a Windows registry setting as noted above.
See Also http://support.microsoft.com/default.aspx?kbid=328890
"New registry entry for controlling the TCP Acknowledgment (ACK) behavior in Windows XP and in Windows Server 2003" which documents that the registry entry to change disable this acknowledgement has a different name in Windows XP and Windows 2003.
Hope this info helps. It would be useful to hear back from you on whether this helps your performance issue.

Performance Issues with large XML (1-1.5MB) files

Hi,
I'm using an XML Schema based Object relational storage for my XML documents which are typically 1-1.5 MB in size and having serious performance issues with XPath Query.
When I do XPath query against an element of SQLType varchar2, I get a good performance. But when I do a similar XPath query against an element of SQLType Collection (Varray of varchar2), I get a very ordinary performance.
I have also created indexes on extract() and analyzed my XMLType table and indexes, but I have no performance gain. Also, I have tried all sorts of storage options available for Collections ie. Varray's, Nested Tables, IOT's, LOB's, Inline, etc... and all these gave me same bad performance.
I even tried creating XMLType views based on XPath queries but the performance didn't improve much.
I guess I'm running out of options and patience as well.;)
I would appreciate any ideas/suggestions, please help.....
Thanks;
Ramakrishna Chinta

Are you having similar symptoms as I am? http://discussions.apple.com/thread.jspa?threadID=2234792&tstart=0

Very Odd Performance Issues

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