Taking a 20" Imac as carry on?

I want to buy a 20" iMac but I will have to transport it on airplanes as a carry on. Is that possible? How?

Hi cin
Welcome to Apple Discussions
Check out iLugger carrying cases > http://www.ilugger.com/
iMacs are shipped around the world everyday in there original cartons, in that put it into a large suit case and check it in.
Dennis

Similar Messages

Bringing my 27"iMac as carry-on luggage on plane

Hello everyone!!!!
I know that if you see this topic you think "whaaaaaaaat????!!??"
But this is the problem: I'm moving from Italy to USA and I have to bring my 27" Imac with me .
I know that a macbook would be easier to carry, but I bought the IMac 27" for professional needs. And I love it as my own child so thinking about selling it makes me sick
So I've been searching for solutions since weeks, and these are the responses:
-Shipping it with UPS or similars costs more then 400€....too much. I have to discard this option
-Putting it in a solid checked bag wrapped in protective foam,pillows and so on : high risk of stealing and damage
-Cargo services from Airlines: they don't do it for personal items...and i think troubles would be same as above
-Buying an Ilugger or this italian bag
http://www.macshop.it/accessori-mac/borse-per-il-trasporto-1/crumar-bag-per-imac -27-and-ampldquo-black-.html
and then bring it on plane as a carried-on bag. Ok I know that it's bigger then requested standards. I'm flying with DELTA and their size limit is 115cm total (I'm lucky, no problems about weight) . the bag is about 52x65x20cm. But they are supposed to be more tolerant since it's not a low-cost company. And of course I will have to ask to place it in a special compartment instead of above-head storage.
This solution was also suggested to me by an American Airlines check-in employee at Fiumicino. He said : " Don't worry and bring it as a carry-on, people brings a lot of strange big instruments with them with no problems.Absolutely don't put it in a checked luggage, cause it will be stolen for sure!"
But he was an italian "take it easy" kind of guy, so he was taking for granted something that cannot be sure at 100%
My main concern is: would it fit to the security scan at the airport?cause the main risk is that security officers will give me troubles about this.
So my questions are:
-did someone made it to bring it on plane as a carried-on bag? Cause I've seen a lot of forum topic talking about this
-does anyone knows a better solution for my case? (apart from selling it and buying a new one in US...considering also the fact that I may return to Italy within a year and have same trouble on the opposite way...and anyway I love mine and don't want to replace it)
thanks
bye!

Silvia, Buongiorno ..
How did you go with this?
Just one man's opinion:
(1) You can easily buy a flight case for a 27" iMac. Google. Every single working photographer, film crew, rock band, etc, uses these every day. These are used every day by photographers, etc, to send their iMac 27 in an airplane as checked luggage. This is completely normal and you can buy one immediately.
BUT it is VERY EXPENSIVE. €500 for the case and €500++ extra for the extra luggage. AND MOST IMPORTANTLY ................ THERE IS ABSOLUTELY NO GUARANTEE it won't get smashed. Any working photographer will tell you "yeah they often get smashed". It's really only a professional solution where noney is no object and you have professional production insurance.
(2) You could simply SHIP IT, for example with UPS or Collissimo or whoever. JUST USE THE ORIGINAL PACKING BOX / MATERIAL.This is exactly how the iMac came from China to Italy originally. Insure it properly. This will be pretty expensive and probably your best option.
(3) I agree with you totally: REMOVE the rear leg, and then put the iMac in the smallest/thinnest bag possible. (Put the keyboard and everything else in your checked luggage.) You and your wife / etc .. don't take ANY OTHER CARRYON LUGGAGE AT ALL, not even a handbag.
They will take pity on you since it is your ONLY carryon luggage. IMO you should be OK.
You know, we landed at Malpensa once with very expensive "indestructible" Rimowa metal cases.
The ground handlers completely destroyed one of the Rimowas!!!!!! (Fortunately there was nothing fragile inside, so nothing inside was damaged.) The airline very generously completely replaced the extremely expensive case, but if any machine had been inside it would have been toast and no insurance. Again the important point is .... ANY PROFESSIONAL WILL TELL YOU flight cases get destroyed all the time. If you take course "1" it is very expensive, AND, there is NO guarantee at all your computer will arrive.
With option "2" there is no more or less risk than option "1", and option "2" is tremendously cheaper.
In option "2" a flight case WILL NOT PARTICULARLY HELP YOU. Fedex/etc is completely used to moving the type of box that an iMac comes in. Don't forget, ALMOST EVERY iMAC PURCHASED, IS DELIVERED BY UPS or Fedex!!!!
Every single iMac bought from the apple.com online store, travels the last 1000 km with Collissimo, Fedex or whoever. They are not total idiots. They obviously deliver those sort of things every day. So it is pointless adding a flight case (€500 !!) to option 2.
But really for me your best option is to fake it as carryon luggage. Remove the stand as you say. And do the trick of you and your family, have NO other carryon. Explain you are a working photographer or whatever and it is your instrument, and just place it carefully in the overhead bins. You should be fine, I'd say.
FINALLY: in fact are you shipping your furniture to the USA??? if so ....... just include it. Use the original iMac box. Put it - say - on the sofa cushions, tied down. Of course, then you will be without your computer for a month or so.
BTW what's with these peope saying "sell your computer"?! I would never sell a Mac, too emotionally attached! Good luck!

IMessage and FaceTime stops working in iMac after carrier change

Hi all,
I have done a fair bit of googling and had a look at the discussion history here but couldn't find a solution to my problem. Apology if it has been raised and discussed before and I woud appreciate being re-directed to the thread.
I have got iMessage and Face Time running smoothly on my iPad 2 wi-fi, iphone 4S and iMac OX 10.8.4. However, on the day of my changing carrier (17/09/2013), iMessage and FaceTime stopped working on my iMac as well as iPad 2. It can longer recieve or send messages or receive or make Face Time calls. All the settings looked the same - tick mark next to both my Apple ID email and mobile number, and conversation has always been set to start from mobile number on all devices. iMessage and FaceTime continue to work on iphone 4S without any issues. New sim card but same mobile number. I don't worry too much about the iPad. I just want to make it work again on my iMac and appreciate any help anyone can offer.
Steps I have attempted to make iMessage work again (I left Face Time turned off on iphone and iMac during this time)
0) I disabled/removed Bonjour (GTalk) in iMessage setting in iMac
1) I have turned off iMessage and FaceTime on all devices and swtiched iMessage only back on in iphone 4S first and then iMac. I got the message on my iphone that the iMac will start using the mobile number and Apple ID to send iMessages. However, iMac still fails to send or receive messages.
2) I have updated Apple ID on the web (removed the phone number, saved, and then re-entered phone number assoicated with Apple ID). Then repeat #1
3) I have tried changing "start new conversation from Apple ID email" across all devices - did not resolve anything
4) I have added a friend's Apple ID in iMessage on my iMac -mobile number automatically appeared and tick marks for both her mobile and Apple ID email but unable to send or recieve messages still while it continues to work from her iphone
5) I have also done a PRAM reset - I got the 2 chimes - did not resolve the issue
There's a clear trigger for this problem - change of carrier but I don't understand why it is affecting the iMac (and ipad) but not the iphone itself. Does anyone have any ideas what I can do about it?
Thanks for your help in advance.

Hi,
At the OS X 10.8.2 update things regarding the iMessages Account's login were changed.
It now requires that the Mac's Serial Number is held in the Memory for it on the Logic Board.
It can get missed in Refurbishments and Repairs.
This is used to generate the Auth-Token for your Apple ID in the Keychain.
Go to Application/Utilities and open Keychain Access.
In the Login Keychain look for "IDS: (Your Apple ID)-AuthToken"
Double clicking this will open the Info Panel.
Check the Access tab and make sure it is either allowing Any App or lists Messages, IMCore and those in this pic.
Although it is know that the Mac has to list the Serial Number it is not clear if other info is needed.
It is possible that it also refers to your Public IP address in some way, this would seem unlikely as most people's ISP issued IP address is from a DHCP server - you basically keep the same IP as you are "Always On" between the router and the ISP but it can change.
If it is not allowing access then change the settings.
There are also two .plists that contain the word imessages
One of these refers to the server you connect to.
com.apple.imservice.iMessage.plist contains the Info you have in the Preferences of Messages (Apple ID, Linked iPhone Numbers and any additional emails)
com.apple.imessage.bag.plist contains which server at iMessages you connect to.
I would try deleting (drag to Trash) the second of these and then restarting Messages.
If that does not work Quit Messages and delete the AuthToken for your Apple ID (if the AuthToken appeared to be allowing access above.)
Restart Messages.
8:03 pm Sunday; September 22, 2013
 iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.4)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images."  No, Seriously

Mail taking up whole iMac screen

Whenever I open Mail, it takes up the entire space on my iMac screen. It wasn't this way until yesterday and nothing I do seems to help. I click on the green plus sign and it doesn't make it smaller. How do I get Mail to go back to a smaller display? Help! Thank you!
Mac OSX
Safari 5.1.10
Mail version 4.6

Move the arrow to the top of the screen when you're in Mail, when the menu shows up, click on the button on the top right corner (rectangle with two arrows pointing to the center), this should take it back to normal.

Possible solution for white C2D iMacs with screen artifacts or lines

I have a white 20" Core 2 Duo iMac with the famous screen artifacts issues. Screen tearing, horizontal lines, goofy pixels, you name it. From my research it seems there are countless others with these problems.
I tried running the SMC fan control app to boost fan speeds. This helped a little, but did not completely solve the issue. A lot of people think these issues are related to heat, and I agree, but only partially. When a graphics chip overheats it is eventually damaged. I have damaged my share of graphics chips while overclocking them in my PCs. In the case of my iMac and maybe plenty of others, I still have issues if the GPU is hot or cold.
I installed WinXP using bootcamp. I finally found an application which will change the clock speed of the GPU on the fly. The X1600 GPU in my iMac has a 475Mhz core speed and 500Mhz memory speed. I cut these down to 400Mhz on the core and 400Mhz on the memory. At these lower speeds I no longer have any issues with screen tearing, horizontal lines, or random crashing. I do still have a few wierd pixels here and there, but they are not all that noticeable and I can live with them.
Now for the fun part. I wanted to permanently fix these speeds into my GPU so when I boot back to Mac OS X, I don't have any issues, and I no longer have to boost fan speeds or run any additional apps. I spent most of today taking apart my iMac, putting DOS on a spare SATA hard drive, and running an external monitor while booting my iMac with the spare drive hanging out the side. All this so I can run ATIflash, and use it to dump an image of the GPU BIOS ROM file.
Well, I ended up finding out the ATI GPU has no ROM to flash. My best guess is open firmware or something like that passes this data on to the GPU when the system boots.
So, in my case slowing the GPU down significantly reduced my problems while running within windows. I am 100% confident slowing the GPU down will also improve issues within Mac OS X, but I have no way to pull this off.
If Apple reads this, or if anyone has any connections at Apple, can we please get an optional firmware update to reduce the speeds of the X1600 GPU? It won't fix all the iMacs with these issues, but it will fix quite a few, and for those out there who don't have any issues at all with their white C2D iMacs, lowering the GPU speeds will most likely prevent damage from inevitably occurring, keeping them a happy customer.
Now, some of you may not like the idea of a slower GPU, but if I have to pick between a slower GPU and an $800 logic board, I will take the slower GPU any day.

There is a little easier Way to Navigate in Doing an F.D.R. than that Method: I listed it here if you prefer going this Route..
2. Re: FACTORY RESET FOR RAZR AN RAZR MAXX

How big of an internal drive can I put in my 2007 iMac

My 2007 iMac hard drive has died & I'm looking for a new hard drive. What size/ how big can I go?
Debra

Are you planning on taking apart your iMac and installing this drive, yourself?
This is not an easy DIY project to do if you are a newbie or novice to working on computers or Macs.
It is a lot easier to purchase and external FireWire 800 hard drive and format it for OS X, install OS X on it and boot from and use the external drive.
Best external drives are from OWC (macsales.com) Mercury Pro or Mini stack drives (with or without additonal optical drive) and external FW hard drives from LaCie.
http://eshop.macsales.com/shop/firewire/1394/USB/EliteAL/eSATA_FW800_FW400_USB
http://eshop.macsales.com/shop/ministack_max
http://eshop.macsales.com/shop/ministack
http://www.lacie.com/us/products/product.htm?id=10554
I, personally, prefer Lacie drives. They are built like a rock and work very, very well. The drives have a good record for longevity.
Good Luck!

IMac won't startup - freezes on either white screen or Apple symbol

Got my 24" 2.4GHz iMac on release last year, with Tiger. Installed Leopard on it on release day.
The problem I have is that ever since a botched Boot Camp installation I've had endless problems with certain applications hanging during their startup (notably Image Capture) or refusing to quit (notably iTunes). Force Quit doesn't resolve these issues. Restarting doesn't work because Force Quit can't quit them so I have to pull the plug or otherwise force a shutdown.
Upon restarting I either get the grey screen that instantly appears, or, if I've pulled the plug and left it for a few minutes I can get to the Apple symbol but no spinner or any further start up action. Occasionally I get lucky, get back up and running, and all is well until the next crash.
All this started happening when I decided to try installing Windows on Boot Camp again. I've had it on here a couple of times since Leopard was released but usually end up deleting it eventually because either the Windows installation gets bogged down or I get bored with it and never use it. Anyway, this time, using the same discs I've always used (and yes, it's SP2, so it should be fine and anyway it's worked at least twice before) when I got to the 'restart to continue installing Windows' bit, I got the white screen and nothing happened. After an hour or so of praying and restarting endlessly trying to get a response, I finally got it to recognise my OSX installation and was up and running again. The Boot Camp volume didn't appear to be there and Disk Utility revealed zero problems whatsoever. Everything looked fine until these recurring hangs, refusals to quit apps and screwed up start-ups.
Any ideas? I don't have the expensive Apple support, but it's less than a year old! Of course, I realise that this means nothing to Apple, who seem to think I should pay a premium in order to have my machine warrantied by them for more than 90 days. Grr...
If I get it up and running I'm thinking I should just wipe the ENTIRE system absolutely clean and re-install Leopard and then use my Time Machine backup to put all my data back on (pricelessly valuable as I use the machine to work on my photography with), but I'm concerned that if there's a flaw in the System somewhere, a corruption, that installing the Time Machine backup will just reintroduce the error. On the other hand, if it's a deeply embedded and invisinle partition corruption from the bad Boot Camp installation attempt, that should be fixed by wiping the entire drive to reinstall Leopard, right?
Any ideas? I'm absolutely sick to the back teeth of this now.
Many thanks,
Owen

But service support means dragging my iMac down to an Apple Store after making an appointment that's no doubt a couple of days away. Taking a 24" iMac on public transport in London isn't something I particularly want to do.
It did actually start up eventually. I left it sitting on the Apple logo and after a few minutes it restarted itself and all was fine, until a couple of days later when two apps failed to quit, and force quit wouldn't do anything. Neither would Terminal, or Activity Monitor (it was BBEdit and Photo Mechanic this time).
I was forced to pull the plug and since then nothing whatsoever will get it past the Apple logo. Tried popping the original Tiger DVD in and running the hardware diagnostic and it says everything is fine, but trying to restart from the Tiger DVD, or the Leopard DVD, or any other DVD that's bootable, or the hard drive, or an external hard drive - all of them result in hanging at the Apple screen. Tried safe mode, tried holding Alt to choose a startup drive, everything.
What the heck do I do now?!

Information About My iMac Computer??

Add External eSATA Port
am i'm allowed to use an External eSata Drive for My iMac Computer? cause i need more Storage but my Memory is in good Standards & where can I Get an External eSata Drive from? I Went to OWC.com & I Contacted them on Twitter & they told me that I Can use there iMac Turnkey Service and add more than one drive :-)
so can I Really use an External eSata Drive or port or whatever it's called on my iMac Computer, I Told them i had an 2009 24inch Apple iMac Computer & i told them i don't know how to install Hard Drives cause i never done it before so i'm a little scared to do it? so i had to ask this question??
or what kind of Hard Drive I Can put in My 2009 24inch iMac Computer, i'm looking for a 2TB Drive? & will The Apple Store install it for me?

The Apple store won't install it, but an authorized service provider will. That is if you want to replace the internal hard drive you have now. The only other way (and only on some models) would be that they take out the Super Drive and put another hard drive in there. Not worth it with the age of your computer, Byron.
Much better (and cheaper): get another external hard drive and park all your movies, etc. there and get them off your internal drive. Here are some good ones from OWC:
http://eshop.macsales.com/shop/firewire/EliteALmini/eSATA_FW800_FW400_USB
You can't use an eSata drive because your Mac doesn't have an eSata port and, again, considering the age of your machine, it is not worth adding that expense. Firewire 800 will work just fine.
And PLEASE - do not even think about taking apart your iMac - only people who are used to this kind of stuff should do it. There are many many parts inside to remove. Here are some photos:
http://news.cnet.com/8301-13506_3-10210484-17.html
This is a job for a professional!

How to get custom iCal colors to carry over to iPad or iPhone calendars

How do I get custom calendar colors designated on my iMac to carry over to my iPad or iPhone? It used to do so, and now it no longer does.

Thanks Joe. We have discovered from this forum, actually, that if you send the photos from the iPhone, if that's where they were taken, then you are asked what size.
"If you send from the camera, then you get the option of reducing the size. If you send from your other photos synced from your computer, they don't have that option of reducing."
I tested it by sending a couple of photos taken by my iPhone, and sure enough, was asked as to size. Then sent the same two photos from my iPad (Photostream) and was not asked. Interestingly though, the sizes were identical in both emails.

IMac G3 Take Apart

I have been considering taking apart my iMac G3 600 Mghz "snow". The screen is very bad and i think it will die very soon. I plan to put it in a new case and use it as a server, but i had a few quesitons. If I take it apart what precautions should i take and is it even worth it at all? Would there be any danger involved in it? I plan on taking out the Logic board, Power Supply, CD Drive, HardDrive, down-converter someting and any other parts that are necessary to run.
What are you thoughts on this?

You could try to locate the service and repair manual for your iMac on the Internet. I think the name is
imac_summer01.pdf. AppleRescue has this manual for sale. See: http://applerescue.com/
Check out this site:
Take apart guide
iMac HDD Upgrade Guide (Slot-Loading)
Warning:
The power supply is just a logic board and it isn't separately enclosed like a pc power supply. And the power supply is next to the crt and crt contains dangerous/fatal voltages even after powering off your machine!
Robert

Imac to imac cable needed

My monitor went on old iMac G3 - so I bought a newer faster iMac G3 and would like to access old iMac applications, documents and photos.
I understand a USB cable with adapter will achieve this - part no. would be helpful for purchasing.
I am also questioning after the cabling is achieved will I want to 'mirror' displays?, partition hard drives?, and will I have problems with the old system OS 9.2 vs. the new system OS 10.3.7?
Thanks for your time and consideration into my problem!
Alieta

Hi alieta,
Welcome to the forum.
You cannot do what you're after with a usb cable. The only way to achieve what you want (without taking the old iMac apart and removing the hard drive) is via FireWire Target Disk Mode - FWTDM.
Both Macs will need to have a firewire port and you'll need a firewire cable. If both Macs have firewire then do the following:
1. Leave old iMac switched off and turn on new iMac.
2. Connect both Macs together using firewire cable.
3. Switch on old iMac and press and hold the 'T' key.
That's it. The old iMac will go into FWTDM and it's hard disk will appear on the new iMac. You can then navigate to the files you want and simply drag and drop them on to the new iMac's hd.
RD

We Need an iMAC G5 B A G ! ! !

How come apple didn't come up with a bag to carry the "semi-portable" iMac G5?? I have been searching for a caring case for a 20 inch iMac for about two months now,and the only thing i found is iLugger bags which seem to have some problems with the shipping so I don't feel like risking it... more details see: http://www.ilugger.com/ . There was also another company for such cases but way toooooo expensive, check it at: http://www.tenba.com/apple/iMacnewaircase.htm .Anyway I am desperate.i need to have a case for my iMac.. And I thing that apple oughts to introduce a case for it's iMacs..

Apple has not done their own carrying case since the original 128k Mac, so I very much doubt that they'll do one for the iMac G5 (very few people want to carry theirs around) so you'll have to look to third-party vendors. Try the iLugger for starters.
And just FYI, a Google search for "iMac G5 carrying case" brought that one up in just a few seconds for me.

Itunes to Home Theatre : Do I NEED Apple TV ?

My primary goal is simply to feed my iTunes music to my new Yamaha home theatre (HTIB). It would be nice, but not necessarily my goal to also send video from my iMac to the home theatre.
Near as I can tell, I have the following options :
Option 1 : run miniDVI >>DVI>>HDMI cable from my iMac to HTIB receiver. The Yamaha receiver only has 2 HDMI inputs, which I'd really like to use for my DVD player and HD DVR, so this is not my preferable option. Plus, I have read that it's not advisable to run HDMI more than about 16 feet, which I'd be right about at that length. I understand that I may need to do some configuring in my iMac controls set-up to make sure that all the audio currently playing on the iMac speakers is sent to the HDMI out.
Option 2 : run the audio out the headphone jack on the iMac, converted to red/white cable to the Yamaha receiver. Isn't the headphone jack output an analog signal? If so, this option seems like a sub-optimal solution. I'm not even sure if the Yamaha receiver would handle getting an analog input when it expects digital. Clearly I want to get the audio to the receiver in digital format; same as a CD player component into the receiver, right ?
Option 3 : get an AppleTV : I think I understand how that would work, and it should work nicely, for both audio and video. I currently have a syslink wireless router. The only downside appears to be the cost. I'd like to find a simple iMac to receiver wired connection to send (digitally) my iTunes to the home theatre, if possible. I'd prefer not to spend the $230 if I can get away with it
Option 4 : My iMac has what I believe to be "firewire" output. I'm not sure, the symbol next to the output port is sort of like the USB symbol, but different. I'm not sure what this port is, or if it has applications for what I'm trying to do.
Option 5 : is thewre a USB solution for me ? I know I have several open USB ports back there.
Option 6 : what about a hard wired connection from my Syslink router to the Home theatre ? How would I get my iTunes sent out through the network cable to the router ? I see a network cable input to the Yahama - maybe this is an option ?
Thanks !
from my iMac does carry audio and video, but the
PROS : simple, no need for AppleTV,

1 - non-starter unless you run analogue/optical audio cable too - DVI only transmits video, no audio
2 - iMac audio out can be set to be analogue or optical - your receiver might accept either - what's the model?
4 - you don't need this to accomplish what you want
5 - not without replicating functionality the iMac audio out already has
6 - again, give the receiver model - you ay have more options if this is say a DLNA compliant device that allows media to be streamed to it
3 - personally I think AppleTv is great for music playback and why I bought mine - does your receiver have component in (the other video out on AppleTV) and optical digital in? Or maybe the TV has component video and you could connect AppleTV to TV for video signal and run optical lead for audio to receiver (though you'd not get AppleTV soud through the TV).
As others mention, an Airport Express is another option which can be a cheaper audio out extension for your computer to playback iTunes digitally via optical cable. Cheaper, but you either need the iMac nearby to control this (so just use the iMac) or an iPhone/iPod Touch to select the music. The downside to the iPhone/iPod Touch in my opinion is that they'd need to be charged with excellent wireless reception in the room you want to use them - both my iPhones wi-fi in the house is flaky to say the least whereas my AppleTV is near perfect for reception.
Tell us what the receiver type is.

How many cpus on server are allocated to client

hello,
its not an issue rather doubt which is hunting me from last 2-3 days.
My 10gR2 Oracle database running on
Widows server 2008 R2 Enterprise
Processor ----> intel Xeon cpu [email protected] GHz (4 processor)
RAM------>8GB
its a dedicated server.
Actually i was going through the AWR report whn one of the client came to me with slow database performance during some time interval.
when i had a look at the Top 5 Timed Events in Report it showed me the
Sql*net message from client      834.35si told them to run their query so that i can have trace of that.
then time event showed me something nearer to above and our database was taking only 15 sec to carry out the task.
i told them that
"you application/client is taking 834 sec to tell our database to do something.But once the database got your application's request to carry out something, the database is taking only 15 sec to provide you with the result"
so they asked me to justify that the problem is with application side/machine side.
After digging in a lot on the internet ground, chatting with my colleges on cell phone and running through many threads specially Asktom.oracle.com, i got really confused.
They came up with varied opinions which kept me thinking again & again over the same thing.
In one of his(Thomas kyte) thread the discussion was as follows.
The output of tkprof when the developers run the same program on their PC shows a big difference in
SQL*Net message from client.
The SQL*Net message from client from my tkprof is almost 4-5 times theirs.
Could you please advise what might be the cause of that?
Thanks
Followup   August 25, 2009 - 9am Central time zone:
that could mean.....
your machine is slow (their desktop cpus blow your server cpus away) as much as anything.
since their code is not instrumented, try SQL*Net trace (with TIMESTAMPS) can be helpful to check out the time in the network between the client and server. See Note 16658.1 - see if you experience radically different response times on the various machines.
4 stars   August 25, 2009 - 2pm Central time zone
Bookmark | Bottom | Top
Reviewer: Jaklin Ekdawi
My Database server is T5120 with 4 core 1.2 GHz Ultra SPARC T2 processor (from O/S it is seen as 32
CPU * 1.2 GHz).
Their PC has 2 CPU * 4 Ghz.
Based on the above, How come their PC is more powerful than my server?
The ASH Report for the execution period of the program shows ¿CPU + Wait for CPU¿ is the top event,
however, tkprof shows ¿SQL*Net from client¿ is the top event waited on.
Top User Events
Event        Event Class    % Activity    Avg Active Sessions
CPU + Wait for CPU     CPU             81.66        0.14
log file sync             Commit             5.92        0.01
db file scattered read     User I/O     2.37        0.00
Can you please explain why there is a difference between tkprof and ASH report?
Thank You
Followup   August 25, 2009 - 8pm Central time zone:
I only care about a single cpu, your client program is not using more than one.
I often downloaded stuff from my big bad sparc to my desktop because my desktop was many times faster than the sparc.
look further down in the ash report - sqlnet message from client is an idle wait, we tend to ignore it as it is the time we spent WAITING FOR THE CLIENT.
Their pc looks a lot faster than your server since you are only using a single cpu - your client is not multi-process. It only uses a single cpu.
4 stars   August 25, 2009 - 2pm Central time zone
Bookmark | Bottom | Top
Reviewer: Jaklin Ekdawi
Sorry, I forgot to say that during the execution time the cpu on the server was 98-99% idle based
on (using top and sar).
Thanks
Followup   August 25, 2009 - 8pm Central time zone:
I agree, because you could not use 31 out of 32 cpus, I would expect it to be almost idle.
97% idle would mean a single cpu was 100% used. So, it sounds like you were using almost 100% of that single cpu you had access to.
and it isn't as fast as their pc.
4 stars   August 25, 2009 - 10pm Central time zone
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Reviewer: Jaklin Ekdawi
The tkprof from the developer's PC is below
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call     count       cpu    elapsed       disk      query    current        rows
Parse      122      0.39       0.68          0        403          0           0
Execute    122      0.00       0.00          0          0          0           0
Fetch      396      0.09       0.11          0      25354          0         274
total      640      0.48       0.80          0      25757          0         274
Misses in library cache during parse: 122
Elapsed times include waiting on following events:
Event waited on                             Times   Max. Wait Total Waited
----------------------------------------   Waited ---------- ------------
SQL*Net message to client                     763        0.00          0.00
SQL*Net message from client                   763       14.71        312.91
SQL*Net more data to client                   122        0.00          0.00
The tkprof for the running the same process on Solaris DB Server
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call     count       cpu    elapsed       disk      query    current        rows
Parse      124      0.06       0.03          0          0          0           0
Execute    124      0.04       0.01          0          0          0           0
Fetch      400      0.07       0.10          0        802          0         276
total      648      0.17       0.15          0        802          0         276
Misses in library cache during parse: 1
Elapsed times include waiting on following events:
Event waited on                             Times   Max. Wait Total Waited
----------------------------------------   Waited ---------- ------------
SQL*Net message to client                     774        0.00          0.00
SQL*Net message from client                   774       43.65        964.23
- On Solaris DB server, the CPU is 0.17, however, "SQL*Net message from client" is 964.23.
- On the developer¿s PC, the CPU is 0.48, however, "SQL*Net message from client" is 312.91.
Based on that, how I can approve it is CPU issue?
Followup   August 26, 2009 - 7pm Central time zone:
how about this.
have the developers write something that mimics what they do without the database in it. Same sorts of loops and processing they do in the code in the client.
run it on their machine
run it on yours
You'll find your big bad server has cpu's that are extremely slow compared to the desktop machine.
Hence - the time spent waiting for sqlnet message from client is - time spent in YOUR client on YOUR server processing the data returned from the database.
saying "the cpu 0.17 on one and 0.48 on the other" is meaningless, they are completely different cpus with completely different performance characteristics.
And that you have 32 of them - no use to you, you use one..
It looks like your server is about 2-3 times slower then their test machine.
5 stars SQL*Net Message from client may not be an issue from the app   May 28, 2010 - 8am Central time zone
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Reviewer: Thierry B from Paris, France
Hi,
I just read your post as I experienced the exact same problem. I found something that fixed this
problem for me, my sqlnet.ora contained that line after an oracle upgrade:
TRACE_LEVEL_CLIENT=16
I don't know how it came there. But it was the cause of my problem (too long idle time). I simply
removed it and no more wait events.
I hope it can be of any help for anyone.
Followup   May 28, 2010 - 8am Central time zone:
that is a client side issue though, isn't it. It is an application side issue, not a database side issue.
5 stars   April 15, 2011 - 10am Central time zone
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Reviewer: A reader in this thread Tom insisted that the client has access to only 1 CPU on the server even though the questioner told him that his machine is having around 32 CPU'S.
so this thread was the source of my confusion.
i kept asking myself "if the client application has access to one cpu out of 32 cpu's on the server on which the database server is running,then What is the use of multiprocessor? my oracle/client application has access to only one cpu on the server(like Tom said), what other 31 cpu's on the server machine are upto?if one cpu is getting exhausted by the client Application request, then what the other processor are doing ? are they not meant for load balancing?"
when i had a chat on cell phone with my colleagues regarding the oracle access to the cpu's on the server, then they told me that if there are more number of cpu's then the the response time would be fast cause workload is divided among the multiple processor to carry out the task in parallel.
Again i got confused with the deferring opinion..
so just want to have clarification on
* how many processes do i have access to on server machine where my oracle is installed?*
how many processes do the client applicaiton S/W/client machine have access to out of 32 processors?
is workload devided among the cpus on the server ,in case of huge request from the client application?
thanks & i hope my doubt would be cleared

Look at it in basic terms (forgetting for the moment about Oracle and SQL*Net and specific s/w itself).
A process is loaded into memory. This process contains machine code instructions. How many CPUs can execute these instructions?
Only 1.
Simplistically. The process has a single execution pointer and set of CPU registers. A single CPU executes the instruction (as indicated by the execution pointer). The registers are used and updated.
The same CPU may not be used each time around. So a single process can during its lifetime, be executed by a number of CPUs. But a single CPU at a time.
A process can thread. This basically means that a second copy of the execution pointer and registers set are created. Each such copy will be executed by by a single CPU at a time.
An Oracle client is serviced by an Oracle server process (either dedicated or shared). On Linux/Unix systems, this will be a unique physical process. On Windows, it will be a unique thread.
This process is executed by a single CPU. Thus that client is serviced by a single CPU.
This changes when Oracle can use parallel processing and there are PX slave processes available. In that case, the client is serviced by a single process - but that process has in turn enlisted the assistance of helper processes. Thus the client is now serviced by multiple processes (or threads on Windows) and thus by multiple CPUs.
However, it is not that simple either. It is "cheaper" for the kernel to run threads on the same CPU than on different CPUs. The reason is the same memory is used by both and access to that memory by different CPUs is more complex (and thus more expensive and slower) than from the same CPU.
So depending on a number of factors, that client may still be serviced by a single CPU despite the fact that PX slaves are used. And from a client process perspective, this does not really matter. The crux of the issue in this regard is the CPU utilisation/footprint of that client process on the server.
If the clock time for a client process says "+running for 60s+" and the server says "+CPU time is 10s+", you cannot say that the process was not serviced by multiple CPUs. You do not know whether than 10s CPU time was for 5 processes each spending 2s to service that client.
However, when the server says "+CPU time is 70s+" - a longer period that the wall clock time of the client, then it is reasonable to assume that multiple server processes (and thus CPUs) are servicing that client process.
As for exactly how many CPUs are in fact used by the server? That has no real bearing on this. It does not change client-server behaviour.
Even Oracle does not know and does not care which CPU is servicing it. The correct piece of s/w to deal with that, is the kernel. Yes, you can bind a thread or process to a specific server CPU, but the reasons for this is quite technical and is always an exception. Let the kernel deal with which CPU to use. It is of no concern to the server s/w (like Oracle), and even less to the client process being serviced by that server s/w.

Audio output not working

The audio jack in the back of my iMac is not working. This has happened off and on before but it seems to have totally failed now. There is supposed to be a red light visible inside the jack. I believe the digital output is sharing this jack, there is no red light working now also. I am using a USB to M-Audio box to send my sound to my speakers right nw. I am wondering if anyone has has this problem and got it repaired?
Thanks
Gary

Is your iMac still under warranty? Also, before you take it in for repair, have you tried using Apple-made headphones (like the white ear buds) to test your audio jack?
Also, have you tried using another device to plug into the USB slot you are currently trying to use? To see if it works?
I had a similar problem last year, when I purchased an iMac in Feb 2011. After a few months of usage, there was no audio coming through the headphones I plugged into the audio jack, AND I was having issues with USB devices not being recognized when I plugged it into a certain slot.
After numerous FRUSTRATING visits to the Genius bar where the motherboard and audio cable was completely (and needlessly) replaced, it was finally deternined the actual port with the audio and USB ports was misaligned within the iMac metal shell. So after being initially told that I couldn't get a replacement, they gave me a brand new iMac as it was a physical defect that couldn't be fixed.
Since getting the new replacement, I'm now having minor (and strange) issues with audio again. I suspect it's a common and fundamental flaw with the recent iMacs that Apple seriously needs to address.
Good luck with this - taking in an iMac is terribly stressful. Feel free to mention the possible flaw with the misaligned port - hopefully this will save you the trouble of making numerous trips.

Taking a 20" Imac as carry on?

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