MacOS 下 launchd 高磁盘写入的原因是 Spotlight

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这是一个创建于 828 天前的主题，其中的信息可能已经有所发展或是发生改变。

MacOS 下 launchd 平均每天磁盘写入都超过 10GB ，前 ubuntu 用户表示真的忍不了，经过分析写入文件位于 /var/log/com.apple.xpc.launchd/ 的 log ，平均每分钟写入 10M 以上，全是用于启动 SpotLight 的操作

这个 mdworker 进程被频繁启动然后再被 kill ，不知道是哪个鬼才想出来的好主意，库克知道么？

2022-08-23 17:43:11.908127 <Notice>: Last log repeated 2 times
2022-08-23 17:43:11.907854 (system) <Warning>: failed lookup: name = com.apple.AppleLOM.Watchdog, flags = 0x1, requestor = watchdogd[301], error = 3: No such process
2022-08-23 17:43:27.284613 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000) <Notice>: internal event: WILL_SPAWN, code = 0
2022-08-23 17:43:27.284718 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000) <Notice>: service state: spawn scheduled
2022-08-23 17:43:27.284723 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000) <Notice>: service state: spawning
2022-08-23 17:43:27.285151 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000) <Notice>: launching: ipc (mach)
2022-08-23 17:43:27.286377 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000 [55975]) <Notice>: xpcproxy spawned with pid 55975
2022-08-23 17:43:27.286406 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000 [55975]) <Notice>: internal event: SPAWNED, code = 0
2022-08-23 17:43:27.286413 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000 [55975]) <Notice>: service state: xpcproxy
2022-08-23 17:43:27.286432 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000 [55975]) <Notice>: internal event: SOURCE_ATTACH, code = 0
2022-08-23 17:43:27.295285 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000 [55975]) <Notice>: service state: running
2022-08-23 17:43:27.295298 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000 [55975]) <Notice>: internal event: INIT, code = 0
2022-08-23 17:43:27.295308 (user/501/com.apple.mdworker.shared.0B000000-0300-0000-0000-000000000000 [55975]) <Notice>: Successfully spawned mdworker_shared[55975] because ipc (mach)
2022-08-23 17:43:41.908483 (system) <Warning>: failed lookup: name = com.apple.AppleLOM.Watchdog, flags = 0x1, requestor = watchdogd[301], error = 3: No such process
2022-08-23 17:43:59.239397 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000) <Notice>: internal event: WILL_SPAWN, code = 0
2022-08-23 17:43:59.239508 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000) <Notice>: service state: spawn scheduled
2022-08-23 17:43:59.239512 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000) <Notice>: service state: spawning
2022-08-23 17:43:59.239939 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000) <Notice>: launching: ipc (mach)
2022-08-23 17:43:59.241171 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000 [55976]) <Notice>: xpcproxy spawned with pid 55976
2022-08-23 17:43:59.241204 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000 [55976]) <Notice>: internal event: SPAWNED, code = 0
2022-08-23 17:43:59.241211 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000 [55976]) <Notice>: service state: xpcproxy
2022-08-23 17:43:59.241230 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000 [55976]) <Notice>: internal event: SOURCE_ATTACH, code = 0
2022-08-23 17:43:59.250474 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000 [55976]) <Notice>: service state: running
2022-08-23 17:43:59.250492 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000 [55976]) <Notice>: internal event: INIT, code = 0
2022-08-23 17:43:59.250505 (user/501/com.apple.mdworker.shared.0A000000-0300-0000-0000-000000000000 [55976]) <Notice>: Successfully spawned mdworker_shared[55976] because ipc (mach)
2022-08-23 17:44:09.824141 (gui/501 [100019]) <Warning>: failed lookup: name = com.apple.DFRSystemExtra.InputMenu.disableinput, flags = 0x1, requestor = TextInputMenuAg[724], error = 3: No such process
2022-08-23 17:44:11.909041 <Notice>: Last log repeated 1 times
2022-08-23 17:44:11.908979 (system) <Warning>: failed lookup: name = com.apple.AppleLOM.Watchdog, flags = 0x1, requestor = watchdogd[301], error = 3: No such process
2022-08-23 17:44:13.598349 (gui/501 [100019]) <Warning>: failed lookup: name = com.apple.DFRSystemExtra.InputMenu.disableinput, flags = 0x1, requestor = TextInputMenuAg[724], error = 3: No such process
2022-08-23 17:44:39.219725 <Notice>: Last log repeated 3 times

第 1 条附言 · 2022-08-24 17:13:46 +08:00

此话题终结，感谢 12 楼

第 2 条附言 · 2022-08-24 20:54:40 +08:00

时隔一日更新：
+ Macbook Air M2 16 + 1T ，每日高强度 Chrome + VSCode
+ 没有关闭 Spotlight 之前，每日 launchd + md* 写入约 10-20 GB ，kernel_taskd 写入 3-5 GB 左右
+ 关闭 Spotlight 后，launchd 写入约 0.5-2 GB ，kernel_taskd 写入 2 GB 左右

13 条回复 • 2022-08-24 17:13:19 +08:00

starrystarry

2022-08-23 18:26:56 +08:00

这个 bug 自从 macOS 10.14.6 的某个 Combo 更新之后就有了
国外论坛反馈 /private/var/folders/*/*/C/com.Apple.metadata.mdworker 里有数十万的空文件夹

xtinput

2022-08-23 19:15:07 +08:00

关掉重建就 OK 了，这个是创建系统搜索的索引

xtinput

2022-08-23 19:22:56 +08:00

@starrystarry #1 我在用 macOS13b5 ，没找到这个文件夹

bosskwei

2022-08-23 19:45:20 +08:00

@starrystarry 我找到了你说的这个帖子，一年前就有人讨论了 https://forums.macrumors.com/threads/spotlight-mdworker-shared-file-flooding-system-log-removal-stops-search-index-from-working-properly.2248163/page-4

@xtinput 自己看 log 吧 /var/log/com.apple.xpc.launchd/

xtinput

2022-08-23 19:58:37 +08:00

我在活动监视器里面只看到 mdworker 进程读磁盘，没看到它写入
试试重建 Spotlight 索引吧

bosskwei

2022-08-23 20:07:27 +08:00

@xtinput 大哥，你看一眼 log 好么？？怎么给你说 A 你总是回复 B 。。。。。这个读写是 launchd 的

bosskwei

2022-08-23 20:07:59 +08:00

@xtinput 你不会用 terminal ？？搞笑呢

bosskwei

2022-08-23 20:08:17 +08:00

vim /var/log/com.apple.xpc.launchd/* 懂了么？

xtinput

2022-08-23 20:21:50 +08:00

你的意思是每分钟写入了 10M 的日志？？？我这 launchd 进程 10 天写入量是 42GB
既然知道是 Spotlight ，那把它关了就 OK 了呀

/var/log/com.apple.xpc.launchd/ 文件夹下面只有 3 个文件，最早的一个是今天下午创建的，三个文件一共 20M 不到

bosskwei

2022-08-23 21:18:09 +08:00

@xtinput 看文件的尺寸没有意义，因为旧的日志会被自动删除。你进去看里面的内容，搜索 mdworker.shared 试试，有惊喜 :)

xtinput

2022-08-23 21:24:55 +08:00

活动监视器有硬盘写入记录呀 launchd 10 天 42GB

YoungShook

2022-08-24 14:52:14 +08:00

Disable spotlight indexing on macOS to heavily speed up Virtual Instances.
# massively increase virtualized macOS by disabling spotlight.
sudo mdutil -i off -a

# since you can't use spotlight to find apps, you can renable with
# sudo mdutil -i on -a

bosskwei

2022-08-24 17:13:19 +08:00

@YoungShook 感谢，这个命令不用关 sip ，非常有用。我试试搞个 crontab 定时任务，每天只允许 spotlight 启动一个小时，然后立刻 disable ，这样应该既可以用功能又不会一直在后台刷新