What is mds mac os

Если ваш Mac неожиданно работает медленно и вы запустили Activity Monitor, вы можете заметить, что процесс с именем «mds» начинает работать с 30% и даже до 90% загрузки ЦП. Если вы видите это, не волнуйтесь, это не ненормальное поведение, и ваш Mac не дает сбоя, а просто индексирует, встроен в поисковую систему.

Что такое MDS в Mac OS?

mds означает «сервер метаданных», а процесс mds является частью Spotlight, удивительно мощной и очень полезной функции поиска, встроенной непосредственно в основу Mac OS X. Вы получаете доступ к Spotlight, нажимая клавиши Command + Spacebar.

Простой способ определить, что mds и Spotlight индексируют, — это посмотреть на значок Spotlight в верхнем правом углу вашей строки меню, когда Spotlight индексирует, у лупы будет точка в центре, например:

Затем вы можете нажать на значок Spotlight, и вы увидите, что ваш основной жесткий диск проиндексирован, с индикатором выполнения и приблизительным временем до завершения:

Связан ли процесс mds с mdworker?

Да. Обычно вы видите процесс mds в сочетании с mdworker, который является еще одной частью Spotlight и механизма индексирования.

Сколько времени занимает mds & Spotlight, чтобы завершить индексацию?

Время, необходимое для обновления индекса Spotlight, зависит от нескольких переменных, но в основном от размера вашего жесткого диска, объема индексируемых данных, основных изменений в файловой системе и времени с момента последней индексации. Просто дайте индексации завершиться, обычно это занимает от 15 до 45 минут.

Если Spotlight не работает, вы можете ознакомиться с этими советами по поиску и устранению неисправностей Spotlight, которые помогут вам снова найти свое место. Если вы никогда не используете функцию поиска или просто не любите ее, вы также можете отключить Spotlight и все его индексации.

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Что такое mds и mdworker, и почему оно запущено на моем Mac

В «Мониторинге системы» вы можете заметить несколько процессов под назвалнием mds и mdworker. У них нет иконки, и они постоянно запущены. Не беспокойтесь, они безвредны.

Эти два процесса являются частью Spotlight, инструмента поиска macOS. Первый, mds — это сервер метаданных. Этот процесс управляет индексом, используемым для быстрого поиска результатов. Второй, mdworker — это «работник» сервера метаданных, но делает все работу по фактической индексации ваших файлов, чтобы сделать быстрый поиск возможным.

Почему mds и mdworker используют много ОЗУ и грузит процессор?

Если вы недавно перенесли свои файлы и приложения с одного Mac на другой или загрузили большое количество новых файлов, вполне нормально, что mds и mdworker работают на полных мощностях, тем самым используя много памяти и процессора. Эти процессы работают над созданием индекса всех ваших файлов, что в дальнейшем обеспечит быстрый поиск.

Как можно определить это наверняка? Откройте Spotlight, и вы увидите слово «Индексирование» рядом с индикатором выполнения.

Если вы видите это сообщение, знайте, что Spotlight работает над созданием индекса, это и есть причиной использования ресурсов. Обычно это занимает несколько часов, хотя и может варьироваться в зависимости от вашего жесткого диска и скорости процессора.

Spotlight настроен так, чтобы не использовать все ваши ресурсы. Если вы используете компьютер для других операций, которые требуют много ресурсов, процессы индексации должны временно остановиться. Но если ваш Mac остался бездействующим, и вы подключены к сети электропитания, Spotlight будет использовать все доступные ресурсы, необходимые для создания базы данных.

Пересоздание индекса Spotlight

Если эти процессы никогда не заканчивают работу и постоянно используют ваш процессор и память через несколько дней после начала индексации, есть вероятность, что ваш индекс поврежден. К счастью, вы можете исправить это, восстановив индекс Spotlight.

Существует два основных способа сделать это. Первый заключается в том, чтобы добавить весь ваш жесткий диск в список исключенных мест, а затем повторно добавить его. Во-вторых, можно выполнить следующую команду в терминале:

В любом случае, весь ваш индекс Spotlight будет пересоздан. Как только этот процесс будет завершен, mds и mdworker должны перестать использовать ваши ресурсы. Если нет, попробуйте запустить «Первую помощью» в «Дисковой утилите», чтобы исправить проблемы файловой системы на вашем Mac, а затем снова пересоздать индекс. Это позволит решить проблему практически во всех случаях.

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mds – what MDS process is and why it uses CPU on the Mac

If your Mac is suddenly running sluggish and you launched Activity Monitor, you may notice a process named ‘mds’ cranking away at 30% and even up to 90% CPU utilization. If you see this, don’t worry, it’s not abnormal behavior and your Mac isn’t crashing, it’s just indexing it’s built in search engine.

What is MDS in Mac OS?

mds stands for “metadata server” and the mds process is part of Spotlight, the amazingly powerful and very useful search feature built directly into the foundation of Mac OS X. You access Spotlight by hitting Command+Spacebar.

An easy way to identify that mds and Spotlight is indexing is to look at the Spotlight icon in the upper right corner of your menubar, when Spotlight is indexing the magnifying glass will have a dot in the center like so:

You can then click on the Spotlight icon and you’ll see your main hard drive being indexed, with a progress bar and estimated time until completion:

Is the mds process related to mdworker?

Yes. Usually you will see the mds process in conjunction with mdworker, which is another part of Spotlight and it’s indexing engine.

How long does mds & Spotlight take to finish indexing?

How long it takes to update the Spotlight index depends on a few variables, but mostly the size of your hard drive, the amount of data being indexed, major changes to the filesystem, and the time since last indexing. Just let the indexing complete, it generally takes between 15 and 45 minutes to complete.

If Spotlight isn’t working, you can check out these Spotlight troubleshooting tips which will get you situated again. If you don’t ever use the search feature or just don’t like it, you can also disable Spotlight and all of its indexing.

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38 Comments

There sure are a lot of whiny reactions here! Spotlight is only a deamon running on your computer. If you don’t like it, turn it off. Three easy steps:

1) Calm down and learn some computer basics, such as how to use the command line.

2) Run the following command in your terminal:

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist

3) Get back to work.

BTW: A basic rule of computing is to know how to undo (or rollback) anything you’ve done to your computer. Once you discover that Spotlight was useful and you want it back, simply run the following command. (Note the highly meaningful difference between “unload” and “load” in these two otherwise identical commands.

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist

Hmmm… really? Not “well said”.
Advice is well, but said in a moody (whiny?), know-it-all, curmudgeonly, manner.

“Operation not permitted while System Integrity Protection is engaged”

Eject your external harddrive and look it up again.

I did not purchase a Mac so that it would tell me when I can work. I mistakenly believed that my Mac would work for me.

Do not tell me that I am not as smart as Apple and that everything they do is “for my own benefit.”

I found Time Machine Editor that lets me control when Time Machine runs.

I need something similar for Spotlight.

Can’t help U with Spotlight scheduler, but I did learn that, what with the seemingly global effort to strip icons & buttons & such down to absolute minimum of overhead (presumably for WiFi and TeethOfBlue) by removing animations and 3D effects, there is a new, non-animated “Backup In Progress” telltale–an itty-bitty 2ND triangle, at the 8:00 position on the clock, just below (obviously) the tiny triangle at 9:00. I had found that the animation was useful (clock hands/triangle going around, clockwise) to cue me into when backup was giving me a performance whack. The movement, of course, would catch your eye–whereas with the new, non-animated (static?) menubar icon, you only have a split 2nd to see the 2nd triangle “move”–from off to on.

Unrelated, sort of: Can’t figure out how to reduce the # of flashes “on mouse up”–time was we could select 3, 2, 1 or none. I found that 1 flash was just fine, but two and three flashes were an annoyance.

[…] or by hitting the “-” minus button in the lower left. Removing items will trigger the mds and mdworker processes to run again, and when finished the once excluded files will be searchable […]

[…] an upgrade from 10.6, 10.7, or 10.8, this is usually because of Spotlight and the mdworker & mds process combination, which irons itself out over the course of an hour or so. If waiting it out […]

[…] reemphasize, this does not disable Spotlight or mds, it only hides the icon from the […]

[…] can also look in Activity Monitor for the “mds” or “mdworker” processes, both of which are related to […]

If you are using a using any P2P programs you may want to prevent Spotlight from searching your”incoming” directory. I discovered Spotlight was trying to index the partial files and was killing my performance. Once I added the directory to the list under System Preferences > Spotlight > Privacy my utilization went back down to normal.

Great solution! Thanks!

Thank you, George. That is very helpful advice. Cheers.

It’s a bit much to segue from a computer annoyance to a sweeping prediction of where Apple is going.

If mds is going nuts evebn after reboot I would figure it is corruption somewhere. Perhaps reset the index to start from zero: http://support.apple.com/kb/HT2409?viewlocale=en_US&locale=en_US I am very sensitive to processes wasting power on my macbook (no laptoasters, thank you) and rarely have had a problem with mds or spotlight. The UI could use work though, like a lot of Apple stuff right now.

This is only 1 example of what MDS does. On my machine its running at 63% with a secondary mdworker running at 115% and my spotlight is not indicating anything of a rebuild.

This is a major pain in the butt. This happens randomly almost everyday. Spotlight is a bloated piece of junk software that appears to be thrown together by a group of people being rushed. Is not clean, its not smooth, Its not even smart enough to ignore the contents of a program and lists pieces of graphic art for the UI’s and app note files that any normal day to day user would NEVER search for.

Apple is falling apart, loosing its shine, as sloppy programmers, Ideas and programming are poorly implemented and handed out to Users.

I hate spotlight. Do you know how to disable?

BugsMan is a douchebag. Keep up the good work.

Thank you for writing this really nice, simple explanation of mds. It’s been running at 75% on my mac and I didn’t know if it was some process that was hanging that I should kill. I wish you could schedule it without needing to know Terminal language.

And I agree that Spotlight is wonderful and more people should know about it, and so a little praise about it is a good thing. Too bad Bugsman didn’t agree. I’m glad we know his opinion and can change the world to fit his preferences.

I drifted to Alfred from Spotlight, though, because it displays results with big text, in the middle of the screen. I like that!

I just started an initial time machine backup (on a new drive) and I noticed the mds and mdworker processes hitting the CPU in a big way.

Does this mean that spotlight is now also indexing the backed-up files ?

[…] in Mac OS X Lion can be done with the help of the Terminal. The following command unloads the Spotlight mds agent from launchd, preventing the daemon from running or indexing any drives […]

@Kono: do you restart your mac on a regular basic? this will probably clear the problem, as (I’m making a guess here) the process probably uses more RAM over time, in the same manner as Chrome or Firefox after 3 days and 10 tabs openned.

My sys is hanging up for up to 30-60 seconds. AND I see that a root user process called mds is running using 99.8% CPU. AND there are 12 processes of mdworker among 2 users are using NO CPU%.

This is supposed to be file indexing, that usually takes 45 minutes has been running for over 3 DAYS!!

EVEN tho I have restarted computer twice during that 3 days.

AND my Spotlight icon DOES NOT have a dot in the center.

Can I force quit this process? Anychance it’s a virus masking as mds? I ran a MacKeeper scan just now and no files found.

Should I do a disk utility repair disk permission?

MacKeeper is causing your problem, uninstall MacKeeper. Do not install MacKeeper again, it does not help anything.

Then reboot your Mac and LET IT SIT for several hours to complete the indexing.

How do you think it’s going to index if you keep restarting it and turning it off?

my mds and mdworker is completely hogging my system and it has been going on for several week. I am suspecting that this is not a correct behavior. Does anyone know how to fix this permanently?

My mds process is not hogging to the extent that you are describing but it is using a constant 254MB of virtual memory which is the top user on a periminant basis. Does that sound right? Is is a problem?

Great article I have never noticed spotlight icon with a dot in the middle meaning that indexing is going on. Can you schedule it to happen when you decide not when the mac decides? “

sudo ln -s /dev/null /System/Library/Frameworks/CoreServices.framework/Frameworks/Metadata.framework/Support/mds

(For the sake of future Internet searchers finding this page: Just Kidding! Also -f flag left off intentionally. Whew!)

The most important question, however, is “how do you shut down that stupid mds process that is taking up 2GB of memory?” Pertinent if you’re doing computing with your mac, and that silly program is at the top of your “top -o rsize” I just saw it there, found this helpful post, and decided to experiment. I did this command: “sudo killall mds” and it went away. Nothing else seems to have crashed, so I hesitantly recommend this as a possible one-time solution, with caution of course. 🙂

Wait, never mind. It started up again. Anyone know how to disable it?

[…] do MDS and MDWorker have to do with Spotlight? The MDS process and mdworker processes usually run concurrently on your Mac when Spotlight is indexing your Mac. […]

[…] runs the child process mdworker, the two usually run concurrently. You can read specifically about mds and Mac OS for more […]

Contrary to BugsMan, I liked the short article. Thanks OS X Daily for posting these short tips and hints! I didn’t know (or had forgotten) what the dot in the center of the magnifying glass means. Now I know.

BugsMan, maybe you find some tips below your level — you have after all “used Macs from the day they were launched” as you write — then just ignore those helpful hints and be happy that we are others that benefit from them, and be happy you already are in the know.

And which particular Apple employee (Marketing Dept) wrote this?

“What is MDS in Mac OS?

“mds stands for “metadata server” and the mds process is part of Spotlight, the amazingly powerful and very useful search feature built directly into the foundation of Mac OS X. You access Spotlight by hitting Command+Spacebar.”

I subscribe to this RSS feed because I have used Macs from the day they were launched; not to be bombasted with “the amazingly powerful …” hyperboles.

I wish I was an Apple employee!

Seriously though, I’ve had enough people ask me about “my Mac is running slow randomly” and “what the heck is mds and mdserver?” that I felt it justified writing an explanation. We have a pretty diverse readership here from complete novice to expert and we try to accommodate that. You’re more than welcome to email us some topics, suggestions, or even your own tips to osxdailycom@gmail.com

I find Spotlight pretty handy and I use it constantly, so I tend to talk it up a bit, it’s not meant to convey any other message or agenda.

spotlight is driving me crazy. I want to disable it and I can’t. No matter what key that I hit, spotlight pops up. Pleeze help me.

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