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#1 2009-05-19 7:02 pm
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Activity Monitor MAC OS X
I read either in an issue or online about going to the activity monitor to help with problems. The only thing is, I am a new Mac user and pretty much a novice to computers, so I am not sure what the activity monitor is supposed to look like. I have absolutely no idea what the CPU, System Memory, Disk Activity, Disk Usage, and Network are supposed to look like in the little graph at the bottom. Also, all of the processes, for example, in the first column is PID below that are numbers corresponding with each process name......am I supposed to highlight each process, then click on 'Quit Process'? I don't want to do anything that I cannot undo. One example for a process is 'Dock' and the PID for it is 529.....what does that mean?? Is that how many times I have used it and not quit it properly? I know this may sound so silly to many of you users, and I'm quite embarrassed, but please HELP!!!! Also, if I am supposed to quit all of these processes, will it speed up my machine? It's not running extremely slow, just slower than when I got it, which was 6 months ago.

Thanks so much for your help!!
d
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#3 2009-05-19 8:24 pm
Re: Activity Monitor MAC OS X
PID is the Process ID. It's just a number that unix uses to keep track of processes. It assigns them as the process is created.
Unix geeks use can use the terminal and the PID to get more information on the process (who owns it--a user or the system, what is its parent or child processes, etc.), or end it with the kill command. Basically the same things you use Activity Monitor for, but without the visual cues.
You definitely should NOT kill processes if you don't know what you are doing (or following some clear directions). After all everything you are doing on your computer is part of some process, so you can easily make your computer become completely unresponsive and have to restart.
What you would normally want to see is as little disk activity and CPU usage as possible when you are idling (that is, none of your applications are actually busy doing anything). Don't worry if memory usage is always high...the OS likes to distribute as much of it as possible.
Basically, if you are experiencing slowdowns, you want to see if there is some task hogging up disk activity or CPU power when it shouldn't be.
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#4 2009-05-19 9:32 pm
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Re: Activity Monitor MAC OS X
What is running slower: web site loading or the computer in general ? If websites, then there are several possibilities: bad web coding, heavy advertising, slow servers including your ISP, especially ad-servers.
What model Mac are you running and who is your ISP ?
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#5 2009-05-22 10:13 pm
- jerwin
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Re: Activity Monitor MAC OS X
If your Mac is anything like mine, Activity monitor will show that the CPU is pegged at 15% System, 85% User, 0.0 idle, with backupd and spindump grabbing a solid 20% each. The Memory pie graph should be mostly red, with a small sliver of yellow. 
Last edited by jerwin (2009-05-22 10:15 pm)
Some subjects actually enjoy pain, and withhold information they might otherwise have divulged in order to be punished.
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#6 2009-05-24 2:33 pm
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Re: Activity Monitor MAC OS X
To answer a specific question - the Dock process is quite literally the program that IS the dock. That particular process starts up whenever you log into your computer, and usually isn't quit until you log out or shut down.
As for quitting processes from the Activity Monitor - most processes listed there have a specific function, many of which are not obvious. Some run the file sharing or printing systems, others find other networked printers and file shares, others sit waiting around for someone to remotely log into the machine or operate the local command line. Some of these you can do without in many situations, but these usually don't eat up cpu time or much memory. Quitting them wouldn't gain you much. Others are necessary to operate the computer and force quitting one of them may A) dump you out to the login prompt or B) the computer will be forced to restart.
If you have a process that is eating up your cpu time and it doesn't correspond to some application you are actively using, I suggest plugging its name into Google to see if you can find out what it does before force quitting it.
One thing to watch out for is the listing for Free Memory - this should be above zero, ideally more than a few megabytes. When a computer fills up the ram memory it starts swapping chunks of information from the ram to the hard disk and back - to gain more working space when everything it is doing doesn't fit into ram all at the same time. The problem is this swapping is SLOW.
There should also be a count for Pageins and Pageouts. Pageins are data being moved from the hard drive to the ram - this count going up is normal. Pageouts is the opposite direction - if this number is noticeably increasing as you use your computer then you are most likely hitting the swap.
Apple calls this swapping scheme "Virtual Memory". You may also see a size listed for "VM" (virtual memory) this is how much hard drive space is being used for this swapping, and some other normal temporary data storage. Having a VM size of a few hundred megabytes or a gig or so is normal, having this balloon in size is another sign of swapping. Quitting programs and / or rebooting can bring the amount of memory the computer is trying to use back down into range of how much you actually have. Look for both a low or zero free memory, and a sky rocketing Pageout count, alongside a big slowdown of the computer as signs of swapping, which _may_ explain your computer slowdown.
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#7 2009-05-24 3:00 pm
- jerwin
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Re: Activity Monitor MAC OS X
MacOSX's memory manager will quickly eat up free memory. If a program needs more, inactive memory (recently closed programs, etc) is scavenged from inactive memory. You can, however, run "purge" (from the terminal) if you plan to run a program that needs as much memory as possible.
Last edited by jerwin (2009-05-24 6:16 pm)
Some subjects actually enjoy pain, and withhold information they might otherwise have divulged in order to be punished.
Central Intelligence Agency. (1983). Human Resource Exploitation Training Manual
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