Does Time Machine use a lot of CPU power if I leave it on ?

If I leave Time Machine on and have it automatically back up every hour, will that use much of my cpu ?

minimal usage after the initial backup.
Look at your Activity Monitor and see for yourself.
>Applications/Utilities/ActivityMonitor.app>CPU

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Does Time Machine use a differential/delta file compression when copying files ?

Hello,
I would like to use Time Machine to backup to a MacBook Air but that computer is using a Virtual Machines store in a single file of 50 GBytes.
Once the initial backup will be done, does Time Machine will only copy the changes in this large file or will everyday copy the full 50 Bytes?
In other word does Time Machine use a differential/dela file compression algorithm (like un rsync)?
If it is not yet the case, can you please file for me an application request to the development team internally?
If others are also interested in such a feature, you’re welcome to vote for it.
Kind regards,
Olivier

Ok, it looks like the current version of Time Machine cannot handle efficiently in network terms large files like Virtual Machine files and this a real issue today.
Is anybody here able to file an official feature request to Apple to be able to use Time Machine efficiently also with large files (let's stay > 5 GBytes) ?
I should propably mean using a differential compression algorythm over the network like the examples below:
http://rsync.samba.org/tech_report/tech_report.html
http://en.wikipedia.org/wiki/Remote_Differential_Compression

Seems Firefox is suddenly using a lot of CPU power

My desktop, recently, started sounding like it was really laboring while I wander around the net. And there's a delay as I type messages like this... the letters show up a second or two behind the keystrokes.
I looked at CPU usage (Win XP with all updates) and while I'm doing this, it sometimes peaks to 35% or higher for Firefox.exe.
My laptop has recently started telling me Firefox is using a lot of memory and I should close and restart Firefox. (Also updated Win XP)
It's becoming a big PITA...

It didn't show up when i searched for the problem on Google and it didn't show up when i search here on Firefox's support site either.
And the reason it didn't because it's mostly not about my problem.
'''If' it was one of those things then i would have a high CPU usage the minute i opened my browser, but i don't.'''
'''It will use a lot of CPU power (after a couple of hours) even if i don't do anything '''
And yes hardware acceleration is on and so is submit performance data and i use Ad Block Plus, and there isn't a correctly working theme or add-on out there that could use 50-60% of a 3.2GHz quad core CPU
I don't think this is something that can be fixed that easily

Firefox 9 after a while starts using a lot of CPU power, need help!

After a while (2 hours or more) firefox 9 (not the plugin container) starts eating up more and more CPU power, usually just to 25% (because usually i close it and restart it after that), but today i had work to do and i couldn't restart it right then and that resulted in firefix using about 50-60% of a 4 core 3.2GHz CPU (AMD Phenom II X4 955).
I'm not doing anything extraordinary just writing emails and just plain normal browsing)
I only notice this because my CPU fan speeds up and makes a lot more noise if using more then 20% CPU power.
I'm pretty sure regular users wouldn't notice anything until it started to slow down their whole PC
I'm using Firefox 9.0.1 running on Win 7 64bit, i have about 20-30 tabs always open (loading) and i haven't tried disabling any add-ons.
I've read on forums that this might have something to do with flash data piling up, or with having to many tabs open.

It didn't show up when i searched for the problem on Google and it didn't show up when i search here on Firefox's support site either.
And the reason it didn't because it's mostly not about my problem.
'''If' it was one of those things then i would have a high CPU usage the minute i opened my browser, but i don't.'''
'''It will use a lot of CPU power (after a couple of hours) even if i don't do anything '''
And yes hardware acceleration is on and so is submit performance data and i use Ad Block Plus, and there isn't a correctly working theme or add-on out there that could use 50-60% of a 3.2GHz quad core CPU
I don't think this is something that can be fixed that easily

How does time machine use the external disk space??

does time machine back up only the changed or new stuff or does it back up everything? does this mean that if on "day one" it backed up 600 gb worth of data, the next back up on "day 2" would be 600gb+a few more things, or would it be 600gb+600gb+the few more things? Does it back up "day one" in a whole package and "day two" in another package, or does it back up "day one", plus only the different things made from "day one" to "day two""?
similarly, does it keep stuff from the first back up ever, plus anything new or modified in the following back ups, then when it is full, does it let just the oldest files drop off? or does it drop off everything from the initial backup? that is, if I had 20mb of changes would it erase only 20mb of data to make the new data fit, or would it erase all 600gb from say "day one"?
thanks for the answer!
iMac, Mac OS X (10.6.8)
<Email Edited by Host>

See Pondini's TM FAQs for starters.

Time Machine uses huge amount of processing power

When TM decides to do an incremental backup, the backupd process ***** up a huge amount of my processing power, typically upwards of 45%, causing severe delays and slowdown. Sometimes it's doing it in conjunction with mdworker, but not usually. Is there a way to make Time Machine less processor-intensive? It's really obnoxious.

Stellertony wrote:
When TM decides to do an incremental backup, the backupd process ***** up a huge amount of my processing power, typically upwards of 45%, causing severe delays and slowdown. Sometimes it's doing it in conjunction with mdworker, but not usually. Is there a way to make Time Machine less processor-intensive? It's really obnoxious.
I have not noticed that, but it takes less than a minute on my machine, so I may have missed it.
If you have a slow processor, it will certainly make a bigger "dent" on your system, but then, so does any major app or file transfer.
I suppose it would be possible to give it higher positive nice level.

Scroll is using a lot of CPU

Hello
In my application I have a general scroll that contains a lot of tables and tabs.
The scroll is working slow and is using a lot of CPU power.
Table scrolls are working fine.
Could be something wrong in the code?
Thank you

Of course there could be something wrong in your code. Can you post an SSCCE that reproduces this behaviour?

I have just started using Time Machine. I was thinking about deleting old E-Mails on my Mac to clean. Does Time Machine back up the E-Mails , if so how can I find them in Time Machine ??

I have just started using Time Machine. I was thinking about deleting old E-Mails on my Mac to clean. Does Time Machine back up the E-Mails , if so how can I find them in Time Machine ??

If you back up your mac before deleting your emails, Time Machine should back up your e-mails.
I never tried this so i'm not sure to find them in Time Machine. To browse in your backups simply click the Time Machine icon in your dock. In the right bar, you can select an backup. Than you can browse in finder, in your backkup.
EDIT: Just browsed and CT above was right. This topic might help you:
https://discussions.apple.com/message/20154303#20154303

When using Time Machine to back up to external drive, does Time Machine back up content in your Trash folder?

When using Time Machine to back up to external drive, does Time Machine back up content in your Trash folder?

Go to System Preferences (under the Apple menu) > Time Machine and click the Options button. Click the "+" button in the lower left. In the resulting dialog, check the Show invisible items checkbox. Go to your home folder and look for Trash. Click the Exclude button in the lower right.

How does time machine work when being used with a mac pro?

How does time machine work when backing up a mac pro?
Considering the fact that the mac pro can hold 8TB and a external (non NAS) hard drive can hold only 2TB does time machine only backup the OS disk.

macnewcomer22 wrote:
Considering the fact that the mac pro can hold 8TB and a external (non NAS) hard drive can hold only 2TB does time machine only backup the OS disk.
Time Machine will backup everything by default, on every disk in your Mac.
Choose System Preferences > Options to exclude items. You could exclude everything except your OS...but I'd think it is your data that's more important to you, if you have to make choices.
See...
http://discussions.apple.com/thread.jspa?threadID=1964018
While it's true you can store almost 8TB, how much do you think you'll actually store? If you have 1TB of data you want to store then a 2TB drive can do it. Also when your TM drive begins to get full it will begin deleting the oldest backups to make room.
You could also get a Drobo with 8 bays...
http://www.drobo.com/products/index.php
-mj

Does Time Machine Ever Delete All Traces of a File?

I have a question. I have read up on Time Machine on various articles, posts, and documents across the web and I am having a hard time understanding exactly how time machine deletes files.
When a disk is full, does Time Machine ever make the decision to delete the last copy or version of a file, therefore completely erasing it off the disk forever? I know that Time Machine deletes older versions of files, but will it ever completely delete the last, final backup of a file to make space? If so, I can't imagine using Time Machine as a true piece of backup software. It seems like it would be useful in restoring your computer in an emergency, but as far as backing up files, it seems that it would be catastrophic, because it may choose to delete the last remaing version of a file to make space and you end up losing that file for ever.
Here is an example:
I create a file X.doc
Time Machine backs it up.
I modify X.doc
Time Machine backs up the copy, keeping both the original and the new copy on the backup drive.
I modify X.doc yet again.
Time Machine drive runs out of space. Time Machine deletes the oldest version of X.doc and backs up the new copy.
I create 10 more files unrelated to X.doc
Will Time Macine remove all remaining versions of X.doc to make space for the 10 new files???
I hope I am making sense.

Derek Doublin1 wrote:
Will Time Macine remove all remaining versions of X.doc to make space for the 10 new files???
The worst TM can do is delete all your older copies of files, not the most recent version.
If the drive is full, then it can't accept any more files period.
If you had a full 100GB boot drive and a 100GB TM drive, the TM drive would be a copy of the boot drive with no room for saved states.
If you changed a file on the full boot drive, then TM updates that file on it's full drive, there will be no copy of the previous version of that file.
TimeMachine makes for a poor pernament backup system, because lets say you do a major files addition to your boot drive, TM backs that up and can go ahead and delete files you realized you accidentially deleted just a few short days ago.
It's better than nothing and works ok for newbies, but more seasoned types use many backup methods in addition to TM, because corruption creep is possible with TM as well as malware as it's hooked up so often, in a lot of cases all the time.
Most commonly used backup methods

How Does Time Machine Help If... iCal Data Lost?

Hi,
How does Time Machine help if, say, your iCal database gets messed up? Or, how does it help if you accidentally delete all your playlists from iTunes? I'd be interested to know.

That's a very good question (although probably better directed at Apple than us). Because Time Machine is new and Apple's in house programs handle data in different ways, there are a range of different means of recovering data for different applications. Not very user friendly and iCal is one of the least user friendly ones.
As an experiment, because I don't make much use of iCal and have no real idea how it works, I tried to find out how to restore its data. Starting with working with the application: nope, not TM aware at present. OK, where does it restore its data? Next step Spotlight where, as it happens, the obvious search "Calendars" brings up a folder in ~/Library labelled that with a whole lot of mysterious stuff in it. I'm pretty sure that restoring that folder would do the trick. No doubt, if you could figure out which Calendar belongs to what in the above folder you could restore a single calendar that was causing problems. Still, Apple's clearly got some work to do to make this more transparent. Roll on iCal4!
(By the way Mail also restores from within the program).

Does Task Scheduling use a lot of resources?

This is a curiosity question.
Instinctive I would say that task scheduling must use a lot of resources. Every fraction of a second the system must check the Task Schedule.
Does Task Scheduling use a lot of resources?

No it does not.
Windows uses task scheduling all the time without any impact on performance.
it is hard to find conceptual information on this, but it appears to me task scheduler does not check if there are possibly tasks that need to be executed each few miliseconds. Instead it sounds more logic taks scheduler waits for an interrupt to get
notified when conditions are met.
Think of it the other way around: mouse and keyboard also do not require much resources, allthough windows continuously needs to know whether a key is pressed or the mouse has moved. that is handled by interrupts. Aside of that, making a lookup (like checking
the current system time) does not use a lot of cpu time (even not miliseconds), given the fact modern cpu's do billions of operations per second (http://en.wikipedia.org/wiki/Instructions_per_second)
MCP/MCSA/MCTS/MCITP

ITunes using a lot of CPU

I had been using iTunes for a few hours on my Powerbook and noticed it was using a lot of cpu (about 30-40%) for just playing a song.
I quit the application, and then noticed the following message in my console at around that time:
Jan 19 17:23:16 My-Powerbook mDNSResponder: -1: DNSServiceResolve("My Music", "daap.tcp.", "local.") failed: Client id -1 invalid (-65549)
This looks like it was doing some DNS operation that couldn't be completed?
The application now is working fine after restarting it with the usual sub-10% activity level.
This is iTunes 6.0.2 and the ministore is disabled. Playing was just to local speakers from the local library.
Thanks for any help
Ian

..Step by Step to fix your Mac
They will just say it's a software problem you need to fix most likely.
However if you have exhausted your software fixes and/or Hardware Test gives something, it could be a hardware problem, but likely it's software for what your mentioning.

Does Time Machine backs up also the format of the volume?

Since many softwares cannot be installed on case-sensitive volume, so I erased the whole volume and install OS X Mountain Lion with format of OS Extended(Journaled). Then I use Time Machine backing up to the new system.
But now when I'm trying to install Adobe softwares, here's what I see.
still, It hints that this is a case-senstive volume.
Then I go to check the Disk Utility:
Very weired! It shows as "Mac OS Extended(Journaled) in the Drop-down list, but "case-senstive, journaled) in the discription in bottom.
Anyone has some clues of this??
Thanks.

As well as doing backups and other things, you can use Disk Utility to create RAID volume sets.
Returning to the image you posted, RAID is selected at (1) and so it thinks you are about to create a RAID volume. The format for the new volume would be as shown at (2). On the other hand, the volume at (3) is selected and it is that volume's format which is shown at (4).
I don't think you wanted to create a RAID set; maybe Disk Utility got a click you didn't intend for it. RAID is explained a bit in the Disk Utility help.
I have found a lot of good information about Time Machine at this site:
http://pondini.org/OSX/Home.html
To go back to your original question:
> Does Time Machine backs up also the format of the volume?
My guess would be "No"; but see pondini.org for a definitive answer.

Does Time Machine use a lot of CPU power if I leave it on ?

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