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View Full Version : Awful Ram usage on Mountain Lion... new Macbook Air 2012




Andre29
Jul 28, 2012, 08:13 PM
I have a new Macbook Air 2012 with 4GB ram, on Lion I had 2.02 GB free with 200mb+ inactive ram, with every single program I use open.

Now, I have 660mb ram free and 535mb inactive, and I don't think I even have all the programs I use open yet.

Absolutely abysmal. Seems like Apple's been reading this forum and looking at the mindless suggestions of 8GB.



Maniac Magee
Jul 28, 2012, 11:15 PM
Not so awful at all. Even with 20 apps running at the same time, including 2 video playbacks in safari, a third one in quicktime and a fourth one in vlc, plus itunes playing in the background while editing stuff on iphoto with a partially edited movie in imovies and an ongoing skype conversation using the webcam, not to mention other third party apps that rip my cd and unpack rar packages, etc., there are still 100+mb of free ram on my 4gb/2.5ghz mbp 13''.

In any case, OS Mountain Lion is smart enough to allocate memory efficiently that it runs comfortably on the 4bg of ram that comes by default nowadays.

dcorban
Jul 28, 2012, 11:31 PM
I don't know what you are seeing there. I also have a new 2012 MacBook Air with 4GB RAM. I haven't rebooted since installing ML. I just opened every app in my dock (all iWork, iLife, Plex, etc) and my activity monitor shows 1.33GB memory free.

AzN1337c0d3r
Jul 29, 2012, 12:13 AM
I have a new Macbook Air 2012 with 4GB ram, on Lion I had 2.02 GB free with 200mb+ inactive ram, with every single program I use open.

Now, I have 660mb ram free and 535mb inactive, and I don't think I even have all the programs I use open yet.

Absolutely abysmal. Seems like Apple's been reading this forum and looking at the mindless suggestions of 8GB.

Apple must have changed the termination algorithm somehow.

My rMBP ~4500MB used with nothing but Safari and Mail open.

nuckinfutz
Jul 29, 2012, 12:26 AM
"Free RAM is wasted RAM"

Andre29
Jul 29, 2012, 01:06 AM
Hmm, so what could it be? My computer was finished indexing yesterday, and I don't have heat problems or anything (so no dock running up usage).

Should I try a fresh install?

Mail, safari, finder, nimbuzz, steam, skype, and activity monitor open, not even imessage anymore, and still have 500-600mb free, 511mb inactive.

I'm not sure what is going on here, but not impressed.

dcorban
Jul 29, 2012, 01:15 AM
Are you having performance issues? What, exactly, is not impressing you?

Matthew Yohe
Jul 29, 2012, 01:19 AM
Hmm, so what could it be? My computer was finished indexing yesterday, and I don't have heat problems or anything (so no dock running up usage).

Should I try a fresh install?

Mail, safari, finder, nimbuzz, steam, skype, and activity monitor open, not even imessage anymore, and still have 500-600mb free, 511mb inactive.

I'm not sure what is going on here, but not impressed.

These seem to be just numbers to you and if one is bigger or smaller then that means something bad or good.

Rather than assuming you know what you're talking about with the RAM usage here, why not tell us what the real 'problem' is?

Michael CM1
Jul 29, 2012, 01:30 AM
I have an iMac that used to have 4GB of RAM. It was a little slow when I got a few apps open, plus numerous tabs in Safari. I triped the RAM to 12GB. Now I constantly use about 6GB; right now I'm using almost 10GB without really even noticing.

The point is 4GB of RAM isn't that much anymore if you do a lot of things at the same time. For people like my mom and dad who mainly open a few browser tabs and email, no big deal. But if you have Spotify, iTunes, iMovie, Pages and 10 browser tabs open, you're going to need more. I know this doesn't help the user of a MBA, but it's just something to be aware of when buying computers. 4GB is the bare minimum I would get.

concernedone
Jul 29, 2012, 01:37 AM
These seem to be just numbers to you and if one is bigger or smaller then that means something bad or good.

Rather than assuming you know what you're talking about with the RAM usage here, why not tell us what the real 'problem' is?

What?! Why are you like even questioning the OP? He obviously encountered a problem here. Have some compassion for your fellow New ML users. Geeesh.

ML cashed my system of 16 g of ram it was using 15.9g of ram. See my unanswered post here:
http://forums.macrumors.com/showthread.php?t=1413572


I hated lion. I thought ml might be better but boy was I wrong. I might now be super computer geeky but I am not a noob by no means. Windows 7 got it right. ML just eye candy and it's not even as impressive as the in Linux- Ubuntu. It makes me sad that Mac is no longer catering to the hardcore pro users. So many little issues. Sigh*

----------

I have an iMac that used to have 4GB of RAM. It was a little slow when I got a few apps open, plus numerous tabs in Safari. I triped the RAM to 12GB. Now I constantly use about 6GB; right now I'm using almost 10GB without really even noticing.

The point is 4GB of RAM isn't that much anymore if you do a lot of things at the same time. For people like my mom and dad who mainly open a few browser tabs and email, no big deal. But if you have Spotify, iTunes, iMovie, Pages and 10 browser tabs open, you're going to need more. I know this doesn't help the user of a MBA, but it's just something to be aware of when buying computers. 4GB is the bare minimum I would get.


No no. Yes 4 is limited especially if a company solders the ram to the MOBO. and makes upgrading ram really really expensive than it has to be*apple* Yes they sound like a profit sucking company if they ML less efficient and push ppl to use their ram upgrade system. Eeeek!

But windows 7 is really efficient it doesn't utilize that much ram. I think it can run on 2 g of ram. Pretty sure but don't quote me.

Michael CM1
Jul 29, 2012, 01:47 AM
I used an old white MacBook at work that had 2GB of RAM. It was only running Leopard, but it worked OK with basic stuff. But open Photoshop and a few tabs and EEK.

I agree the lack of upgradability on the MBA stinks, but that's how everything is in such a small space. Apple actually does a nice job on the iMacs of making RAM upgradable. My process was super easy. Hard drives are another matter because of some special equipment or something I read about. I would love to drop a 2TB drive in here, but considering the plethora of external space I'm just going to keep doing that instead.

Matthew Yohe
Jul 29, 2012, 01:51 AM
What?! Why are you like even questioning the OP? He obviously encountered a problem here. Have some compassion for your fellow New ML users. Geeesh.

Why? Because he's assuming he knows what "awful RAM usage is" by some numbers being higher or lower than when in Lion.



ML cashed my system of 16 g of ram it was using 15.9g of ram. See my unanswered post here:
http://forums.macrumors.com/showthread.php?t=1413572


From your post:
"I have 16 G of ram. it was using UP all the ram (15.9!) what's going on?!"

See, you too think that using up all the RAM like that is a problem. It's not.


ML just eye candy and it's not even as impressive as the in Linux- Ubuntu. It makes me sad that Mac is no longer catering to the hardcore pro users. So many little issues. Sigh*


You don't sound like a hardcore pro user.

Beta Particle
Jul 29, 2012, 02:49 AM
I have a new Macbook Air 2012 with 4GB ram, on Lion I had 2.02 GB free with 200mb+ inactive ram, with every single program I use open.

Now, I have 660mb ram free and 535mb inactive, and I don't think I even have all the programs I use open yet.

Absolutely abysmal. Seems like Apple's been reading this forum and looking at the mindless suggestions of 8GB.I don't think you understand how memory management works. As someone else here said, free RAM is wasted RAM.

As long as RAM is properly released when more is required so it's not paging to disk constantly, it's best to keep as much information in RAM as possible—in your example, having 535mb of inactive memory compared to only 200mb on Lion.

krasnoyarsk
Jul 29, 2012, 05:52 AM
Not so awful at all. Even with 20 apps running at the same time, including 2 video playbacks in safari, a third one in quicktime and a fourth one in vlc, plus itunes playing in the background while editing stuff on iphoto with a partially edited movie in imovies and an ongoing skype conversation using the webcam, not to mention other third party apps that rip my cd and unpack rar packages, etc., there are still 100+mb of free ram on my 4gb/2.5ghz mbp 13''.

In any case, OS Mountain Lion is smart enough to allocate memory efficiently that it runs comfortably on the 4bg of ram that comes by default nowadays.

Agree.
ML seems a lot smarter than previous OSes in memory management.

50548
Jul 29, 2012, 06:08 AM
I don't think you understand how memory management works. As someone else here said, free RAM is wasted RAM.

As long as RAM is properly released when more is required so it's not paging to disk constantly, it's best to keep as much information in RAM as possible—in your example, having 535mb of inactive memory compared to only 200mb on Lion.

I don't think you understand much about memory management, then. The users above are reporting almost 95% RAM usage with none or only a few apps open, so there is obviously a problem there.

Moreover, the point you mention is EXACTLY the problem they report: that once all RAM is "used" the computer HAS to resort to disk page outs - there is nothing "in between" - "as long as RAM is properly released so it's not paging to disk constantly" is nonsense, because this is what is NOT happening in their cases.

If THEIR activity monitor shows most of the RAM as wired or active with only the OS open, there definitely is an issue and perhaps a clean install should be tried.

nuckinfutz
Jul 29, 2012, 11:50 AM
I don't think you understand much about memory management, then. The users above are reporting almost 95% RAM usage with none or only a few apps open, so there is obviously a problem there.

Moreover, the point you mention is EXACTLY the problem they report: that once all RAM is "used" the computer HAS to resort to disk page outs - there is nothing "in between" - "as long as RAM is properly released so it's not paging to disk constantly" is nonsense, because this is what is NOT happening in their cases.

If THEIR activity monitor shows most of the RAM as wired or active with only the OS open, there definitely is an issue and perhaps a clean install should be tried.

Where'd you get that from? His actual quote is

"Now, I have 660mb ram free and 535mb inactive, and I don't think I even have all the programs I use open yet."

We don't know if that's a few apps, a handful or several. At this point it's hard to ascertain whether this issue is based on his install or just the new memory management in Mountain Lion. Even in a system with lots of RAM you will still get Page Outs though they shouldn't be excessive.

AzN1337c0d3r
Jul 29, 2012, 02:20 PM
that once all RAM is "used" the computer HAS to resort to disk page outs

Actually, no. RAM that is merely used as cache can be safely discarded without having to page-out to disk.

50548
Jul 29, 2012, 03:19 PM
Even in a system with lots of RAM you will still get Page Outs though they shouldn't be excessive.

I am sorry, but NO; it should be much less than "not excessive". My system has 16GB RAM and right now activity monitor reports a ridiculously low/virtually zero 1.4MB of page outs.

nuckinfutz
Jul 29, 2012, 03:54 PM
http://support.apple.com/kb/HT1342

Clears up any confusion about

Wired RAM
Inactive
Free

etc

concernedone
Jul 29, 2012, 04:15 PM
I don't think you understand much about memory management, then. The users above are reporting almost 95% RAM usage with none or only a few apps open, so there is obviously a problem there.

Moreover, the point you mention is EXACTLY the problem they report: that once all RAM is "used" the computer HAS to resort to disk page outs - there is nothing "in between" - "as long as RAM is properly released so it's not paging to disk constantly" is nonsense, because this is what is NOT happening in their cases.

If THEIR activity monitor shows most of the RAM as wired or active with only the OS open, there definitely is an issue and perhaps a clean install should be tried.

Yes that is the case. I didn't even have any resource intensive app running.

Why? Because he's assuming he knows what "awful RAM usage is" by some numbers being higher or lower than when in Lion.

From your post:
"I have 16 G of ram. it was using UP all the ram (15.9!) what's going on?!"

See, you too think that using up all the RAM like that is a problem. It's not.

You don't sound like a hardcore pro user.

And you don't sound compassionate at all. We're here to be helpful to other new ML fellows here obviously.
Not to like belittle them. :rolleyes:

yes, it is an issue if I don't have many resource (ram) intensive app open and my system is sluggish as a snail as it crashes to oblivion.

seriously how can you judge weather someone is hardcore pro user at all? what's your criteria? and how did you acquire this talent to judge if he/she is a hardcore user by a single MR post. seriously just don't judge. please


I am sorry, but NO; it should be much less than "not excessive". My system has 16GB RAM and right now activity monitor reports a ridiculously low/virtually zero 1.4MB of page outs.

that's what I have. and same on my activity monitor as well.

50548
Jul 29, 2012, 04:27 PM
that's what I have. and same on my activity monitor as well.

You mean you have a LOT of page outs (bad sign of excessive RAM usage) or what?

concernedone
Jul 29, 2012, 04:44 PM
You mean you have a LOT of page outs (bad sign of excessive RAM usage) or what?

Here:
http://i48.tinypic.com/2ikur06.jpg

I normally would do a screen shot (cmd+shift+4) but the system was so sluggish that I had to take the pic with my phone.
It was impossible to move between apps. the scrolling was very slow and sluggish. so I had to do a hard restart.

I'm thinking of doing a clean install. I wanted to try out just updating via the app store but I think it calls for a clean install. What you think?

50548
Jul 29, 2012, 04:55 PM
Here:
Image (http://i48.tinypic.com/2ikur06.jpg)

I normally would do a screen shot (cmd+shift+4) but the system was so sluggish that I had to take the pic with my phone.
It was impossible to move between apps. the scrolling was very slow and sluggish. so I had to do a hard restart.

I'm thinking of doing a clean install. I wanted to try out just updating via the app store but I think it calls for a clean install. What you think?

Well, this is absolutely AWFUL RAM usage. No wonder your system is so slow with so many page outs.

It seems like the main problems are coming from Imagent process, whose memory leak problems have also been reported for Lion...this is normally linked to FaceTime OR iMessage (which has had a NASTY memory eating bug for quite some time now) - check possible solutions below:

http://forums.macrumors.com/showthread.php?t=1305894

https://discussions.apple.com/thread/3772457?start=0&tstart=0

Or just stop using iMessages for now, this should help as well.

Matthew Yohe
Jul 29, 2012, 05:03 PM
seriously how can you judge weather someone is hardcore pro user at all? what's your criteria? and how did you acquire this talent to judge if he/she is a hardcore user by a single MR post. seriously just don't judge. please

Look, you're advising people here on how RAM is supposed to be used, but based on what you've been saying, you clearly haven't shown you understand how this works.

Here:
I normally would do a screen shot (cmd+shift+4) but the system was so sluggish that I had to take the pic with my phone.
It was impossible to move between apps. the scrolling was very slow and sluggish. so I had to do a hard restart.

I'm thinking of doing a clean install. I wanted to try out just updating via the app store but I think it calls for a clean install. What you think?

Ha, wow so your problem seems to be just IMAgent (Messages) is for whatever reason going nuts and using up 10GB of RAM. That's your only issue. Just reboot and watch if IMAgent takes off again. If so, then Apple has a bug to fix. (Note, my IMAgent is sitting at 17MB here on an 8GB machine)

concernedone
Jul 29, 2012, 05:03 PM
Well, this is absolutely AWFUL RAM usage. No wonder your system is so slow with so many page outs.

It seems like the main problems are coming from Imagent process, whose memory leak problems have also been reported for Lion...this is normally linked to FaceTime OR iMessage (which has had a NASTY memory eating bug for quite some time now) - check possible solutions below:

http://forums.macrumors.com/showthread.php?t=1305894

Or just stop using iMessages for now, this should help as well.

yea.. I read that when I googled imagent process. lol. I think I was reading something about it from a dev who previewed a GM of ML about a bad memory leak. I was just so done with Lion so I jumped on ML so fast eventho I should've known better not to jump on it until all bugs are reproted/fixed. it was disappointing to learn that this release have so many problems first hand. >.< normally I would tell my friends like never update (esp for Apple) too early but I guess I need to take my own advice. so yea...

Matthew Yohe
Jul 29, 2012, 05:08 PM
yea.. I read that when I googled imagent process. lol. I think I was reading something about it from a dev who previewed a GM of ML about a bad memory leak. I was just so done with Lion so I jumped on ML so fast eventho I should've known better not to jump on it until all bugs are reproted/fixed. it was disappointing to learn that this release have so many problems first hand. >.< normally I would tell my friends like never update (esp for Apple) too early but I guess I need to take my own advice. so yea...

I've been running the betas for awhile and never saw this... Just format and install fresh and see how it goes I guess.

concernedone
Jul 29, 2012, 05:12 PM
Look, you're advising people here on how RAM is supposed to be used, but based on what you've been saying, you clearly haven't shown you understand how this works.

Ha, wow so your problem seems to be just IMAgent (Messages) is for whatever reason going nuts and using up 10GB of RAM. That's your only issue. Just reboot and watch if IMAgent takes off again. If so, then Apple has a bug to fix. (Note, my IMAgent is sitting at 17MB here on an 8GB machine)

I didn't advise anyone. I was just being sympathetic to the OP's problems. If you have a good knowledge of how ram SHOULD work then why don't you enlighten us with that knowledge that we so dear need. unused ram is wasted ram right?

Umm, I'm not a Mac developer. I am a consumer I rather leave the major bug fixes in the beta stages. that's what devs are for. they need to test this out and perform QA on it. This release seems so beta like vista almost. yea there are a lot of 'new' features but make sure they work ok. I'm voicing my consumer voice because if everyone is just like 'yay apple, i love ML' then there wouldn't be any improvements. YKWIM?

Matthew Yohe
Jul 29, 2012, 05:48 PM
I didn't advise anyone. I was just being sympathetic to the OP's problems. If you have a good knowledge of how ram SHOULD work then why don't you enlighten us with that knowledge that we so dear need. unused ram is wasted ram right?

Umm, I'm not a Mac developer. I am a consumer I rather leave the major bug fixes in the beta stages. that's what devs are for. they need to test this out and perform QA on it. This release seems so beta like vista almost. yea there are a lot of 'new' features but make sure they work ok. I'm voicing my consumer voice because if everyone is just like 'yay apple, i love ML' then there wouldn't be any improvements. YKWIM?

Can you stop with the not being sympathetic/compassionate line here? I'm just getting to the point and have offered to help. He clearly doesn't know what is going on and jumps to the conclusion with the scare headline "Awful Ram usage on Mountain Lion". I noted he didn't seem to know really what's going on and asked him to just specify the problems and not go on assuming things about RAM usage.

So, back to Andre29: What is going on now? Did you reinstall?

NT1440
Jul 29, 2012, 05:51 PM
Hmm, so what could it be? My computer was finished indexing yesterday, and I don't have heat problems or anything (so no dock running up usage).

Should I try a fresh install?

Mail, safari, finder, nimbuzz, steam, skype, and activity monitor open, not even imessage anymore, and still have 500-600mb free, 511mb inactive.

I'm not sure what is going on here, but not impressed.

I'm not really sure what you are supposed to be impressed with. Do you have a performance issues or do the numbers somehow matter to you? Keep in mind all of this is managed by the OS on the fly precisely so you don't have to.

:confused:

Andre29
Jul 31, 2012, 04:47 PM
These seem to be just numbers to you and if one is bigger or smaller then that means something bad or good.

Rather than assuming you know what you're talking about with the RAM usage here, why not tell us what the real 'problem' is?

Assuming? I think that's what you're doing actually; assuming you know anything about my knowledge in RAM and how it works.

Simple math here: little to zero gain except iOS features, and I have over a GB less RAM used than before. I've been using Apple computers and have built my own PC's for nearly a decade now.

I don't understand how it could have been clearer and with me posting trying to figure out if it's just ML, or if something is using too much resources and is awaiting a patch.

Frankly, it just shows how far Apple has declined over their years in respect to their professional audience. I would gladly take out these ridiculous iOS features for more freed up RAM. My PC has had 4GB for years before, and never was close to reaching it even with gaming. In other words, this is probably my last Mac.

rovex
Jul 31, 2012, 05:21 PM
They know the average joe won't opt for the additional 4GB option and get them to fork out on another new machine come the following OS memory-hoarding update when things start to slow down performance-wise.

nuckinfutz
Jul 31, 2012, 05:39 PM
Currently running a MBA 13 with 4GB of RAM


Free - 440MB
Wired - 1.02GB
Active - 1.53GB
inactive -1.03GB

0 bytes a sec page outs.

Free RAM does not matter it's about having a low number for Page Outs.

aristotle
Aug 5, 2012, 10:00 PM
Guys, I was having some serious memory leaks after I upgraded to Mountain Lion from Lion on my iMac. It would drop down to less than a GB of free memory without anything running after leaving it on for a few hours.

I found that after I uninstalled VMware 4.x and Logmein, the memory leak seems to have gone away.

Right now, I have Safari with one tab and Activity Monitor with the following stats:
Free:2.45 GB
Wired: 285.9MB
Active: 1.03 GB
Inactive: 149.2 MB
Used: 1.55 GB

The Kernel task is now sitting around 317.5 MB for the past ten minutes. I think that the above to applications may have had memory leaks in some drivers they loaded.

braddk
Sep 20, 2012, 10:07 AM
I have a new Macbook Air 2012 with 4GB ram, on Lion I had 2.02 GB free with 200mb+ inactive ram, with every single program I use open.

Now, I have 660mb ram free and 535mb inactive, and I don't think I even have all the programs I use open yet.

Absolutely abysmal. Seems like Apple's been reading this forum and looking at the mindless suggestions of 8GB.

open terminal and write

"purge"

and that should do it

dyn
Sep 20, 2012, 01:23 PM
This thread really should be locked. About 90% here have absolutely no idea how memory management in the average operating system works and OS X in particular. Unfortunately they are falsely claiming that they do know. The misinformation continues with the "purge" command.

Too bad because Apple has written some very clear articles about how memory management in OS X works. There are also lots of other books and online articles about memory management in the average OS.

The OP continuously evades every question about what problems (s)he has with the OS memory-wise. That leads to the conclusion that (s)he definitely does not have the knowledge that (s)he is claiming to have. Yet (s)he is picking on the people trying to help. Now, why on earth should we help any further, it is clear that the OP and others here are only after yet another flamewar and spreading of complete misinformation. *sigh* It is getting old you know....

filriyadh
Sep 26, 2012, 11:20 PM
too many people here have a schoolyard bully attitude that requires fixing. 'purging'.

learn to teach people nuttards rather than bring them down because they dont know.

i had the same problem with my mac, fresh boot, safari, vlc would crawl to play a vid.

'support forum' - the lot of you thrown on an island the size of the panties you got in a wad when you wrote those posts . For Shame @@@

Puevlo
Sep 27, 2012, 05:04 AM
Memory management is clearly broken in OS X. How long until people admit it?

Mark Octavian
Nov 14, 2012, 10:24 AM
I'm not really sure what you are supposed to be impressed with. Do you have a performance issues or do the numbers somehow matter to you? Keep in mind all of this is managed by the OS on the fly precisely so you don't have to.

:confused:

Most likely he's having performance issues, otherwise he wouldn't go to look for his memory usage.

I personally am having performance issues. Ever since I bought my first Mac back in 2008 -- it was a Mac Pro running Leopard -- whenever it was running out of memory, everything was slowing down to a crawl. Switching between apps, scrolling down web pages, opening files and dialogs, beach ball of death, etc. I have had 4 different Macs ever since my first one and every single version of OS X up to the current 10.8.2 -- all of them were having this issue.

My current iMac has 16 GB of RAM and whenever it drops below 100-200 MB -- which is pretty rare, but it happens sometimes, especially when there's a leak -- everything slows down to a crawl.

So, please take off your pink fanboy glasses and admit that there's (and has been for quite a while) a problem with memory management in OS X.

If you've never encountered it, it doesn't mean it's not there.

NT1440
Nov 14, 2012, 10:45 AM
So, please take off your pink fanboy glasses and admit that there's (and has been for quite a while) a problem with memory management in OS X.

If you've never encountered it, it doesn't mean it's not there.

Got your tough guy e-pants on huh?

Whats with the hostility? And the insults? I asked for clarification in a way that didn't defend apple in any way. How is trying to understand the reason for a post being a fanboy?

rhoydotp
Nov 14, 2012, 11:27 AM
If you've never encountered it, it doesn't mean it's not there.

someone gave me an early 2008 running Mountain Lion (Core 2 Duo 2.4Ghz) this weekend. Compared to my early 2006 running Snow Leopard (Core Duo 1.8Ghz), it is definitely slower. CPU load is nothing but memory usage is brutal! Both have 2Gigs of RAM and I just ordered an upgrade to 4Gigs yesterday

some people might disagree because they never had the problem, kudos to you. And some might even say the machine is old. Yes it is ... but it is unix-based not windows so let's not get into that ... I am a Solaris admin by trade, fwiw.

but I agree with Mark, the problem exists.

Michaelgtrusa
Nov 15, 2012, 01:20 AM
This is what happens when you insist on having a skeleton crew to boost profits.

satcomer
Nov 15, 2012, 02:14 AM
Memory management is clearly broken in OS X. How long until people admit it?

What proof do you have?

throAU
Nov 15, 2012, 02:53 AM
inactive ram = cache.

when running virtual machines, i've had several gb of "inactive ram" on my mbp as it is using this to cache disk access for my VMs.

Stop looking at memory usage in performance monitor until you see a performance problem and let the OS cache things as required.


all you're going to do by running purge is dump the disk cache and kill IO performance.


Ideally, after you've been running for a while you should have a very small amount of free ram. as much as possible should be consumed by disk cache until the OS needs to purge the cache to reclaim memory for allocation. This is the way real operating systems work, and have worked, for years. RAM is a cache for the disk IO.

As an example, a FreeBSD box i have doing mail relay (it's a VM and has only 1gb ram allocated, it is text mode only):

Mem: 37M Active, 777M Inact, 127M Wired, 26M Cache, 111M Buf, 26M Free

It's currently been up for 3 1/2 months.

Same stuff, different OS.

Same with our accounting system box. It's linux and out of 8gb of RAM in it, 7.2gb is currently CACHE, only 500mb is "free". Just because previous versions of OS X didn't cache as aggressively, it doesn't mean Lion onwards is "broken".

As above, the memory stats to be concerned about are your page outs and (more importantly) pages/sec numbers. Some paging isn't bad, so long as the app being paged out isn't active. Hence, pages out/sec is your most reliable metric for RAM pressure.

ancientscream
Dec 10, 2012, 07:36 AM
Im noting vastly increased ram usage in Mountain Lion, all fanboi's need not comment i'm after someone suffering the same issue not someone who has no issues defending apple, I recommend all my clients to buy machines now with at least 8gb because of these issues, but some twerp genius in the apple store persuaded my client to go for a 4gb macbook air because 8gb is a build to order option and they dont cary it in stock! A******s . Im thinking of taking it back a getting them to exchange for an 8gb bl***y apple, and now im supposed to support this crippled Air they shouldn't make them 4gb soldered on, thats selling them as redundant from the start !

Its one thing to say that os x lion/ML does a allot of caching now, but if it doesn't free up that cache as other programs need it ? (photoshop(though its memory leaks are infamous)restarting doesnt help), or give me control over the amount of caching going on, then its a fing nightmare, typical for apple the user gets no control over the amount of caching ? unless of course you are a unix command line freak who wants to poke the guts in terminal with arcane commands, again if I wanted to spend my time in terminal to resolve basic issues id switch to linux and not use OS X. why the hell did i upgrade from command line based machines in the 80's ? DOS CPM etc if im spending the tweenies using such antiquated arcane rubbish still, If i was a coder id accept such things but seriously apples users should not require this level of expertise or support to deal with basic issues which often revolve around the OS being designed badly, and not any longer including gui based expert control ? thats what Im paying for in an gui OS ? gui control ?

My average client barely deletes emails, insisting they need 3 years back coverage at least, mail folders can range from 4gb-15gb easily, itunes can be well over 50gb with podcasts and movies etc and the same or more with iphoto, now we have ssd's finally storage is begining to move things around quicker and they think 4gb memory is enough ? not on mountain lion it aint. well compared to the PS3 that seems designed crippled with 256mb I guess were rolling in it, but imo 4gb is nowhere near enough any longer, the machines as basic should come with 8gb until apple can get there memory issues under control.

On of my clients with a macbook pro has the finder and photoshop CS6 fully updated live version open with an image 1024x700 pixels in dimension and thats her 4gb gone !!! and the machine is running at a crawl, so badly its impossible to use ! i used to run photoshop on my LCII4/160 ie 4mb of ram a thousand times less memory ! they need to get a grip on this quick, 64bit only code should not have increased memory usage by the amount it seems to have ? No doubt because the user was migrated over using apples rubbish migration assistant, this is an install issue and the "stock" suggestion will be a "clean install" again to resolve, Yeah thank apple thanks for wasting my time and my clients money with migration assistant that somehow B******S's up installs 50% of the time, cheers I can really rely on that. If I was happy doing clean installs every 5 minutes i'd use vista. OH and the fact in my experience that now Upgrade installs of mac os lion and upwards go wrong 50% of the time also, means imo Mountain Lion and Lion should have come with a health warning, these Os's will make you machinery redundant as memory usage will double, and spend vast amount of tech time to troubleshoot, and by the way we will by default recommend and sell to you an air that is crippled with 4gbs of memory and make it impossible to upgrade because we have turned into one of the least moral company's in tech. Apple are beginning to aggravate me, by making my work four times harder than necessary as a tech support, I've been using apples since the Apple IIe days, what apple are forcing me to do is to move all my clients to ***** windows or linux at this rate, get a grip apple.
and macrumours dont make the time out so aggreesive on login as editing this post becomes a nightmare or do I have control of that in a profile preference ?

dyn
Dec 10, 2012, 04:07 PM
Adobe products are known to take system resources as if their devs lives depend on it. I'm not at all surprised that with Adobe Photoshop CS6 it takes away all the RAM. It needs 1GB at minimum according to Adobes specs and a lot of the editing you do is done in memory. You can set limits in Photoshops options. If you were to run Windows with 4GB of memory you'd run into the exact same problem. Where I work all the people running PS6 are using 8GB or more RAM in their machine because of this (most of them are running Win7 64 bit btw).

PS6 isn't the best application to use as a comparison for memory usage. It is quite possibly the worst example you could have picked. I'd look at a different application which isn't known for needing lots of memory and using up system resources.