Questions tagged [mds]

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29 votes
3 answers
25k views

How to isolate processes that evoke insane mds_stores disk read activity?

I have an interesting situation where when I monitor my disk activity, I find that mds_store is continually running between 1 to 35 megabytes per second (averaging around 3-5 MB/s) on the read and ...
ylluminate's user avatar
  • 5,232
6 votes
1 answer
10k views

Why is mds using so much Real Memory?

I notice that mds is almost always on top for use of Real Memory. I wouldn't mind if this wouldn't be also the case when Free Memory runs out. Usually mds uses over 600MB on a system with 4GB (I ...
Peer Stritzinger's user avatar
5 votes
1 answer
1k views

mds error "No store registered for scope" for nonexistent volume

My system log is flooded with error messages like the following: mds: (Error) Server: No store registered for scope "/Volumes/Storage" The volume in the error was in use on a previous machine before ...
mmaa's user avatar
  • 121
5 votes
1 answer
4k views

What does "mds: (Error) Volume: Could not find requested backup type:2 for volume " signify?

In Console.App I can see various log messages. I've diagnosed a Time Machine problem and searched for "backup". In the resulting messages from backupd I also noticed the message 27/07/11 16.01.59,...
Thorbjørn Ravn Andersen's user avatar
4 votes
1 answer
2k views

How do mdfind and mdls derive what metadata a file has and where is it stored?

The man page of mdfind says the following: The mdfind command consults the central metadata store and returns a list of files that match the given metadata query. The query can be a string or a query ...
Blink's user avatar
  • 45
4 votes
1 answer
751 views

Delaying spotlight indexing to avoid the fan noise

I am attending a meeting in a quiet room where everyone has a soft voice, and my mac decides to index for spotlight (the job is 'mds'), bringing the fan to 6200rpm. It's not too bad, just a bit ...
Calaf's user avatar
  • 4,349
4 votes
1 answer
8k views

mds and lsd going crazy

I have noticed big peaks of activity of processes: mds mds_stores lsd mdworker (multiple processes) The console loops over two messages from mds: LaunchServices: Database mapping failed with result ...
Labo's user avatar
  • 306
2 votes
2 answers
134 views

Is there anything that can be done to limit MDS but still get some basic spotlight functionality?

Spotlight, at least for launching applications has become part of my muscle memory, but MDS just will not play nice, not matter what I try. I've tried rebuilding the index. I've tried just about every ...
enjoythattempemail's user avatar
2 votes
1 answer
740 views

Why does Spotlight search no longer work after a system update?

After a recent system update (to Catalina) Spotlight stopped working. Additional symptoms: I could add volumes to the Spotlight>Privacy list and then remove them with the - button but it made no ...
Irl Concord's user avatar
2 votes
1 answer
2k views

mds processes are constantly crashing

Mojave 10.14.4 here -- mds_worker processes constantly crashing and re-spawning as per the logs. The 'indexing' spotlight bar stops at various different points, always getting stuck, though in ...
Harv's user avatar
  • 6,500
2 votes
1 answer
1k views

How to Spotlight index a folder under /private/var

I got a directory /private/var/directory that I'd like to index using Spotlight. It looks like everything under /private/var/ is excluded from indexing. I tried to import it using: mdimport /private/...
barney765's user avatar
  • 121
2 votes
1 answer
378 views

MDS Error: /var/folders/lM

I've been getting this error coming up in my system log. Having looked around for an answer, two things came up commonly: a problem with the spotlight database(s), and permissions on those folders. ...
Harv's user avatar
  • 6,500
2 votes
0 answers
185 views

Cannot Exclude Swap Directory from Spotlight: The item couldn't be added or removed because of an unknown error

Since my Macbook Pro (Big Sur 11.6) is burning through its battery power really quickly with mds_store clocking the most CPU usage, running the following command sudo fs_usage -w -f filesys mds_stores ...
Nyxynyx's user avatar
  • 385
2 votes
1 answer
3k views

Tracing the source of "There was a problem connecting to the server" alerts

After upgrading from MacOS 10.6 to 10.8, I keep getting alerts on my MBP saying "There was a problem connecting to the server xyz". The thing is, there is no longer a machine called "xyz" on my ...
jhfrontz's user avatar
  • 801
1 vote
1 answer
217 views

Could my spotlight search index have really been 2.5 GB on a 256 GB drive?

I have a MacBook Air (13-inch, Mid 2012) with El Capitan 10.11.6 and a 256 GB SSHD. I was having fan/CPU usage issues with mds and using the lines in this answer turned it off and deleted the index. ...
uhoh's user avatar
  • 1,460
1 vote
1 answer
209 views

Unnecessary locations for Spotlight indexing?

I've noticed Spotlight using a lot of processor time and when I review where it's digging about via sudo fs_usage mdworker mds, I see that most of the time is being spent in /System/Library/ and /...
ylluminate's user avatar
  • 5,232
1 vote
1 answer
47 views

When is the metadata store updated?

I'm trying to understand how Spotlight indexing works - in the documentation here, Apple says that the kernel notifies the Spotlight engine which then attempts to update the metadata store. If this is ...
Andrew's user avatar
  • 497
1 vote
1 answer
3k views

What does this mean: "mds: (Warning) FMW: event:1 had an arg mismatch. ac:2 am:51"

mds: (Warning) FMW: event:1 had an arg mismatch. ac:2 am:51 This error shows up in my system.log file regularly. Searching on Google turns up few useful results. One search result points to iTunes ...
iynque's user avatar
  • 885
1 vote
2 answers
847 views

Why is 'mds' accessing my Time Machine drive all the time?

I have a recording studio, and therefore don't want my Time Machine drive being accessed all the time since it's very noisy. I use TimeMachineEditor to schedule backups during the night, which works ...
Max's user avatar
  • 113
0 votes
2 answers
2k views

MDS uses all memory

I recently upgraded to Lion which led me to install a new version of Fuse for the 64bit kernel. Today I upgraded to 10.7.1 and get the following problem. When I mount my truecrypt volume the MDS ...
Hugo's user avatar
  • 412
0 votes
0 answers
157 views

Excessive Logs from MDS in Console

On my Mac, In the Console, there is an excessive amount of logging from the 'mds' process. mds is the service that runs Spotlight. It is also integral to Time Machine, apparently. Small sample (In ...
asteiner's user avatar