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View Full Version : Can I leave my eMac on for a long time?


johnbro23
May 28, 2004, 08:24 PM
I have a BitTorrent I'm downloading thats pretty big and going pretty slow. Do you think it'll be bad for my computer to leave it on (for days probably) while it downloads? Is there some way to let my eMac sleep while it continues to download?

SuperChuck
May 28, 2004, 08:38 PM
The iMac I'm writing this to you with has been on for three years straight. So...yes, it's perfectly fine to leave it on for a few days.

I asked the same question to an Applecare tech a few weeks after my iMac Special Edition DV arrived. His answer was "do you turn your refrigerator off?"

For many applications, computers must be on constantly, and they are designed to handle it just fine.

zimv20
May 28, 2004, 08:42 PM
The iMac I'm writing this to you with has been on for three years straight.
really? your uptime is > 1000 days?

to original poster: no worries. leave it on. in fact, osx runs cleanup utilities on a daily, weekly and monthly basis, timed for sometime at night. so in that regard, it's better to leave it on. and you can fold!

johnbro23
May 28, 2004, 08:53 PM
Wow, that is so cool. I never thought your computer was like a refrigerator. Thats like shocking to me. I'll take your word for it though.

wide
May 28, 2004, 08:55 PM
The iMac I'm writing this to you with has been on for three years straight. So...yes, it's perfectly fine to leave it on for a few days.

I asked the same question to an Applecare tech a few weeks after my iMac Special Edition DV arrived. His answer was "do you turn your refrigerator off?"

For many applications, computers must be on constantly, and they are designed to handle it just fine.

What operating system do you use? Have you upgraded operating systens since three years ago? My computer (my Pismo) requires a restart after I install some programs, software updates, and operating systems.

Coolvirus007
May 28, 2004, 09:16 PM
he's (SuperChuck) just trying to make a point. don't get all fussy 'wide'.

Nermal
May 28, 2004, 09:34 PM
really? your uptime is > 1000 days?

I think rebooting is still considered as "leaving it on". :)

zimv20
May 28, 2004, 10:06 PM
I think rebooting is still considered as "leaving it on". :)
my mileage varied. to me, leaving it on is determined by uptime.

for example, from the machine that until recently was my webserver:
9:59PM up 157 days, 1:08, 2 users, load averages: 1.40, 1.36, 1.33

jemeinc
May 28, 2004, 10:07 PM
LOL... You guys are rough- tough crowd...lol.. In all seriousness though, I once had an uptime of 73 days... Not really sure why that's relevant to this topic, but hey, it is a feather in my Mac using cap...

To answer the original question, no worries leave your mac on- no need to shut down except for upgrades when prompted to...

zimv20
May 28, 2004, 11:03 PM
You guys are rough- tough crowd
but there are production machines which _do_ stay up for years. e.g. sun microsystems makes machines which can keep running through CPU swaps, RAM swaps, power supply swaps, etc...

and i think OS updates and kernel mods, but i might be wrong there.

so i was going to be seriously impressed if a home user had a machine up for 3 years.

neoelectronaut
May 29, 2004, 01:42 AM
My eMac is on 24/7 I'm almost constantly ripping DVDs, downloading something on BitTorrent, Encoding video, and even folding. Anything that takes a long time to complete.

I suggest just turning the energy saver settings for your display to 1 minute and have your screen shut off when you're not using it. It'll both save your screen from burn-ins and save you on energy.

Wyrm
May 29, 2004, 08:28 AM
Wow, that is so cool. I never thought your computer was like a refrigerator. Thats like shocking to me. I'll take your word for it though.

More insightful than you might realize...i.e. the computer IS becoming an appliance.

The longest uptime I've ever heard of was at work, a sun ss/20 had an uptime of over 1500 days... problem was, no-one knew what it did, or wanted to take the risk of rebooting it. Ha ha ha... :cool:

It's better to reboot production machines periodically, just so you know you can do it, but I've kept Linux machines running for a year for ****** and giggles. A Mac running OS X should be able to easily match that if you didn't have to reboot after some simple patches. <sigh>

-Wyrm

titaniumducky
May 29, 2004, 09:43 AM
I have a BitTorrent I'm downloading thats pretty big and going pretty slow. Do you think it'll be bad for my computer to leave it on (for days probably) while it downloads? Is there some way to let my eMac sleep while it continues to download?

TURNING OFF AND ON YOUR COMPUTER REPEATEDLY IS BAD FOR IT!!! LEAVE IT ON ALL THE TIME!

Computer parts are designed to function at a constant state. It's switching between states that causes wear. By states I mean being used, being in standby, and being completely off. As far as power, just put the computer to sleep.

wowser
May 29, 2004, 10:21 AM
Do these clean up facilities work whilst my eMac is sleeping (it likes a good lie in, too!) , or should i also run the Mac Janitor program to make sure they get done?

spencecb
May 29, 2004, 10:54 AM
How does one find the Uptime?

Dr. Zauis
May 29, 2004, 11:12 AM
How does one find the Uptime?
open up terminal and type 'uptime' (without the quotes)

neoelectronaut
May 29, 2004, 12:45 PM
http://www.macupdate.com/info.php/id/9410

I love this little program. I set it as one of my startup apps.

It's also helpful for measuring boot time.

zimv20
May 29, 2004, 01:00 PM
Do these clean up facilities work whilst my eMac is sleeping (it likes a good lie in, too!) , or should i also run the Mac Janitor program to make sure they get done?
they do not. rather than run them manually (as i do on my laptop), why not turn off the sleeping and fold on it?

zimv20
May 29, 2004, 01:01 PM
The longest uptime I've ever heard of was at work, a sun ss/20 had an uptime of over 1500 days... problem was, no-one knew what it did, or wanted to take the risk of rebooting it.
*that* is friggin' hilarious

wrldwzrd89
May 29, 2004, 01:17 PM
they do not. rather than run them manually (as i do on my laptop), why not turn off the sleeping and fold on it?
I do that on my iMac - I recommend setting Energy Saver as follows: computer sleeps - never, display sleeps - 3 minutes (or longer if you sit at the computer often without typing anything or moving the mouse for longer than 3 minutes), hard disk sleeps when possible - yes. It's up to you whether or not you use the screen saver - if you do use it, change the display sleep setting to something longer than your screen saver's activation time like Mac OS X suggests, unless you use the screensaver purely as a means of locking the computer, in which case it does not matter.

neoelectronaut
May 29, 2004, 01:28 PM
Wait, wouldn't having the HD sleep stop stuff like video converting and BT?

live4ever
May 29, 2004, 01:56 PM
Just a few weeks ago I was running at nearly 100% CPU for over 5 days straight (doing video encoding), so no worries.

wrldwzrd89
May 29, 2004, 01:58 PM
Wait, wouldn't having the HD sleep stop stuff like video converting and BT?
Mac OS X is smart enough not to sleep the HD when something tries to read from or write to it - your video conversions/BT sessions would still run without problems.

titaniumducky
May 29, 2004, 02:47 PM
There's nothing wrong with the computer going to sleep. It saves lots of power.

Bittorrent, DVD Ripping, etc. will stop it from going to sleep until the task is done; therefore, that's not a reason.

The only other reason I can think of is the periodic scripts, and there's a solution to that too. Do a google search for "XJanitor.pl" - it's a perl script which checks the logs to see the last time each periodic script was run. If it's been over a day for the daily, a week for the weekly, or a month for the monthly, then it will run the necessary ones. Just add it to crontab to have it run automatically. I have it run at 15 and 45 past the hour (since my computer is a laptop and is frequently asleep). I've checked the logs and it works excellently!

edit: Hah! I have a computer that I only put to sleep manually (eMac) because it acts as a print server (and occasionally a file server). I forgot to include that reason, which is very valid.

flyfish29
May 29, 2004, 02:48 PM
Actually, it is much better for your computer to stay on most of the time. The most wear and tear placed on electronics is the intensive hard drive operations- ie. start up....similar to that of a car. Cars take the most abuse during start up. Idiling is the next hardest...minus high revving or something like that which would obviously be worse.

johnbro23
May 29, 2004, 05:22 PM
Thanks for everyone's help. That really clears things up. Since I'm not paying the bills (my parents do), I'll leave it on all the time. No use worrying about putting it to sleep or shutting down.

SuperChuck
May 30, 2004, 01:09 AM
When I said my Mac had been on for 3 years straight, I wasn't trying to suggest that it had literally never been turned off. Although I usually go a week or so between reboots, my iMac gets a little confused after a long day of Photoshopping and needs a fresh start. Not sure why, really.

saabmp3
May 30, 2004, 11:27 AM
When I said my Mac had been on for 3 years straight, I wasn't trying to suggest that it had literally never been turned off. Although I usually go a week or so between reboots, my iMac gets a little confused after a long day of Photoshopping and needs a fresh start. Not sure why, really.

It's probably just full of page files and other crap. You could try leaving it on (not asleep) over night and letting the cron jobs take over. Might notice a big speed improvement. However, rebooting does the same thing.

BEN

paperkirin
May 30, 2004, 11:58 AM
Thanks for everyone's help. That really clears things up. Since I'm not paying the bills (my parents do), I'll leave it on all the time. No use worrying about putting it to sleep or shutting down.
You should put it to sleep whenever you can, really. Saves your parents money and is better for the environment. Your parents will thank you for the former, the rest of the world for the latter. 'sides, OS X wakes from sleep in about a second.
Kirin

musicpyrite
May 30, 2004, 12:45 PM
Although I usually go a week or so between reboots, my iMac gets a little confused after a long day of Photoshopping and needs a fresh start. Not sure why, really.

I also experience this problem, what fixes it for my is just loggin out, my compter seems just like it was after a fresh restart, and I don't loose uptime. :cool:

wowser
May 30, 2004, 01:20 PM
yes, the wake up time on my eMac was superb. Recovering my Windows PC from sleep was like trying to wake up a 12 year old kid on a schoolday.

Coolvirus007
May 31, 2004, 07:25 AM
In w2k pro, to wake it up theres a progress bar at first showing the amount of time left for it to wake up. That take about 1.5 seconds to fill up. Then the screen goes black for 25 minutes. Then the computer wakes up.

JLaFrance
May 31, 2004, 07:59 PM
I think i've got you all beat, my old computer (imac 333) has been on for.....uhhh....6 1/2 years i think, i've got it working as a file server now so i ges thats why. no probs yet!

Wyrm
May 31, 2004, 08:06 PM
I think i've got you all beat, my old computer (imac 333) has been on for.....uhhh....6 1/2 years i think, i've got it working as a file server now so i ges thats why. no probs yet!

6 1/2 YEARS?!?!?! :eek:
I assume it's OS... what... 7? Or Linux? That's 1998... if it's Linux please post the uptime. If it's not, then how do you know it's been up for that amount of time?

-Wyrm