If you're the sort who likes to keep on top of the apps running on your system, then you've probably already encountered those stubborn processes that, despite quitting the application, keep behind-the-scenes core or periphery application processes running in the background, consuming processing power and draining your battery. Or, out of the blue, the Mac slows down because one of these processes start to run, suddenly eating up 100% of the CPU. Ending this process will improve the overall performance of the computer, especially in systems with less RAM.
PID is process ID you want to kill. Below is the output of commands on mac Terminal. Can't find which process is listening on port 8001 on Mac OS X.
- OSX: Three Ways to Kill or Force Quit System Processes and Programs 13th February 2011 By Greg Ferro Filed Under: Blog, OSX It doesn't happen very often, but right now I've got something that is causing one process to have a memory leak and I have to restart it once a day or so to get back that memory.
- This is a BASH shell builtin, to display your local syntax from the bash prompt type: help kill or man kill. Examples List the running process $ ps PID TTY TIME CMD 1293 pts/5 00:00:00 MyProgram Then kill it $ kill 1293 2+ Terminated MyProgram Or to really really kill it $ kill -9 1293 To close an application you can also send an applescript.
- Kill problematic processes. When you identify a process that's causing a problem, either because it's hogging lots of CPU cycles or memory, or because it's highlighted in the Activity Monitor as having crashed, you need to kill it. To do that, click on the process.
- Today I'm going to list three easy ways to force-quit an application on a Mac, without harming the system. Is it Safe to Force Quit? Forcing a frozen application to quit is the same as killing the symptoms when we get sick versus curing the virus.
Then there are things like removable media and mounted disk images, where processes hidden from plain view https://redphoenixpilot-slotsrisingyp.peatix.com. could well prevent the media from safely ejecting. This is a situation that no doubt everyone has encountered at least a few times…
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How to View Processes
There are various ways to view running apps Casinos around okc. and processes in macOS: looking at the Dock, opening the Force Quit Applications window, using the Terminal, and finally by checking Activity Monitor. Also, certain third party Mac monitoring apps, such as iStat Menus, can allow you to view the processes by clicking on the CPU icon in the menu bar.
Activity Monitor, the built-in system monitoring utility, is the best way to view all processes currently running on the Mac, and from here manage them based on how they affect the computer's performance. Using the ‘view' menu allows users to choose which processes are shown in each of the five categories, be that all processes hierarchically, user processes, system processes, active processes, and more.
The Most Common Processes Mac Users Complain About
Spotlight
At the core of every search performed on a Mac is Spotlight. Whenever you search for a file, it is Spotlight that will locate it for you, because it indexes the contents of the computer. Think of situations such as migrating to a new Mac, after a complete system erase and new install, a major macOS upgrade, and the like. In these cases Spotlight will consume a lot of your computer's computing power. There are situations where it's not important to have a fully indexed Mac, and at these times it makes sense to disable Spotlight to save resources.
Faces, Memories, Photos
Indexing faces and objects was promoted by Apple as one of the key features of the Photos app and macOS Sierra. While in theory it is a nice feature, in actual fact it became a source of frustration because users couldn't understand why it took so long to index the photo library. Some users had huge photo libraries, others smaller, but the result was the same slow indexing process. According to Apple support, the ‘feature' has a daily limit on the number of photos it is able to process.
That's the photoanalysisd process, which sometimes launches and demands CPU resources. As a result, what you'll notice is a slow Mac that can become hot if the process takes too long to run.
What Processes to Kill With Activity Monitor
When you open Activity Monitor, a long list of items appears. When looking at the process names, the vast majority of them may sound like gibberish to you, and you'll be tempted to kill all of them. That won't always be such a good idea, though, so it is important to ask yourself: ‘Which processes do I need to kill?' Fsdh mac os.
- Look for processes with names similar to those of closed apps. It's safe to quit processes that resemble app names you have already quit.
- Close Rosetta applications. These are PowerPC processes running on an Intel-based Mac, so it doesn't make too much sense to allow them to eat into the physical resources of your Mac.
- Quit disk image processes. Sometimes the only way to unmount a stubborn disk image is by killing the associated disk image process.
- Quit processes using high amounts of CPU. In the CPU tab click on the arrow until it is facing downwards. This will help you identify the processes that are demanding high CPU resources.
- Kill all duplicate processes by clicking on the Process Name tab to view the processes in alphabetical order, and quit any secondary items with the exact same name.
Please note that there are some processes that shouldn't be messed with, especially those run by the root user. If you are not certain what a process means, it is better to ask for help from someone who does or contact Apple support.
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Faces, Memories, Photos
Indexing faces and objects was promoted by Apple as one of the key features of the Photos app and macOS Sierra. While in theory it is a nice feature, in actual fact it became a source of frustration because users couldn't understand why it took so long to index the photo library. Some users had huge photo libraries, others smaller, but the result was the same slow indexing process. According to Apple support, the ‘feature' has a daily limit on the number of photos it is able to process.
That's the photoanalysisd process, which sometimes launches and demands CPU resources. As a result, what you'll notice is a slow Mac that can become hot if the process takes too long to run.
What Processes to Kill With Activity Monitor
When you open Activity Monitor, a long list of items appears. When looking at the process names, the vast majority of them may sound like gibberish to you, and you'll be tempted to kill all of them. That won't always be such a good idea, though, so it is important to ask yourself: ‘Which processes do I need to kill?' Fsdh mac os.
- Look for processes with names similar to those of closed apps. It's safe to quit processes that resemble app names you have already quit.
- Close Rosetta applications. These are PowerPC processes running on an Intel-based Mac, so it doesn't make too much sense to allow them to eat into the physical resources of your Mac.
- Quit disk image processes. Sometimes the only way to unmount a stubborn disk image is by killing the associated disk image process.
- Quit processes using high amounts of CPU. In the CPU tab click on the arrow until it is facing downwards. This will help you identify the processes that are demanding high CPU resources.
- Kill all duplicate processes by clicking on the Process Name tab to view the processes in alphabetical order, and quit any secondary items with the exact same name.
Please note that there are some processes that shouldn't be messed with, especially those run by the root user. If you are not certain what a process means, it is better to ask for help from someone who does or contact Apple support.
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Mac Os Catalina
Stay up to date on the latest tech news and discounts on Mac optimization software with our monthly newsletter.
| Click here to return to the 'Killing a root process' hint |
i forget what the -9 is for, but it's good in case something doesn't want to be killed, so -9 is kind of like a kill with extreme prejudice. You can always read the man pages.
The -9 flag will terminate the process immediately without giving the process a chance to exit cleanly. Using -HUP (hangup) is 'nicer' in that the program may be able to shut itself down, but OTOH -HUP doesn't always work and you have to resort to -9 anyway.
For more information open your terminal and type 'man kill'.
The usual way to restart a daemon to reconfigure it is to use kill -HUP. Dunno if it works for mysql but I've done this many times for inetd on solaris 2.6.
Your description of -HUP sounds more like the definition of -TERM (-15).
Kill -HUP is sometimes used to tell a process to restart/refresh. Often it does absolutelty nothing. The author of the program decides what to do in response to a -HUP.
Kill -TERM tells a process to shutdown (TERMinate) and gives the process the opportunity to do so cleanly.
kill -KILL (aka kill -9) is a shutdown that doesn't allow the process to shutdown cleanly.
If you type 'kill -l' (that's an 'L' not the number one) you'll get a list of signals. Count them off to find the numeric equivalent.
kill -l
HUP INT QUIT ILL TRAP ABRT EMT FPE KILL BUS SEGV SYS PIPE ALRM TERM URG STOP TSTP CONT CHLD TTIN TTOU IO XCPU XFSZ VTALRM PROF WINCH INFO USR1 USR2
Mac Os Mojave
It's not by accident that Apple locked it out by default, and that decisionshouldn't be crossed lightly.
In most cases, `sudo` is a far safer tactic. It allows you to run a command
as another user (such as of course the root account), and you're not left in
that other users account where it is all too easy to make a mess of things.
Better by far here would be to find & kill the process in question this way:
That last line is a test to make sure it worked. If it didn't, try
`kill`ing again with numbers increasing from 5 to 9 (shifting from safer
'let it die gracefully' commands to riskier 'alright just shut down NOW'
commands):
It should work by the time you get to -9, but hopefully sooner.
Of course, as another poster noted, this isn't the right way to do it
anyhow. The mysql distribution should have included a shutdown script. If
I knew mysql better I'd quote the command & syntax myself, but the other
poster already said it and, moreover, your mysql documentation should
surely have mentioned how to start & stop the server properly.
Read The Funny Manual!
I stand corrected. Very interesting.
Phillip,
To see all the processes type 'ps aux'. Personally I created/edited the .cshrc file in my home directory to include a line with the following
alias ps 'ps aux'
and once you launch a new terminal window ps will now give you all the details to identify pid's on running processes.
yuri
Surely it's a bad idea to shutdown any kind of database server this way (anybody who's had to force-quit FileMaker will know what i mean.),
Has anybody tried:
cd /usr/local/mysql/bin
./mysqladmin shutdown
If anyone finds some solution I'd love to hear about it. For now it looks as if the only SAFE way to shut it down is to turn off the automatic startup of mysql and restart the computer.
sudo kill process id
Mysql on OS X is ugly. Theoretically you should be able to shut it down cleanly with the
shutdown command from within mysqladmin, but that doesn't sem to work.
I have seen it written that the only clean way to deal with the problem is to
keep the shell which launched the safe daemon, interrupt it with CTL-Z, do
a ps and kill the spawned daemon brood, then kill the broodmaster.
Please correct me if i am wrong. I am waiting for a package which one can have
real confidence in. I have installed mysql on linux, linux ppc and OS X from original
sources. It integrates nicely into the redhat linux daemon start/stop runlevel scheme,
but i don't know how this issue is handled by Mac OS X.
Baldis basics field trip demo but i fixed it mac os. Sending a server process a normal kill signal first is a good idea, lets it know that
it should exit gracefully and gives it a chance to behave like a gentleman :)
By the way, mysql is a very bad citizen, see my post below.
Edmund
