5 ms·

Eh this feels like a false comparison. Memory pressure is an internal macOS system metric not some public facing self aggrandizing metric. It’s not like Apple h

by varenc 2y ago

Eh this feels like a false comparison. Memory pressure is an internal macOS system metric not some public facing self aggrandizing metric. It’s not like Apple has marketing material like “idles at 20% memory pressure!”. I’m sure it’s explicitly and deterministically defined somewhere at least.

justinclift 2y ago
> Memory pressure is an internal macOS system metric Interesting. That'll probably mean it's in the source code Apple publishes for macOS: https://github.com/apple-oss-distributions/distribution-macOS https://github.com/apple-oss-distributions/distribution-macO... Doing a search for the phrase "memory pressure" in the containing organisation (apple-oss-distributions) shows some relevant stuff: https://github.com/search?q=org%3Aapple-oss-distributions+%22memory+pressure%22 https://github.com/search?q=org%3Aapple-oss-distributions+%2... • memorystatus.md : https://github.com/apple-oss-distributions/xnu/blob/94d3b452840153a99b38a3a9659680b2a006908e/doc/vm/memorystatus.md?plain=1#L3 https://github.com/apple-oss-distributions/xnu/blob/94d3b452... # Memorystatus Subsystem Dealing with memory pressure by forcibly recovering pages. (etc) • memory_pressure.1 : https://github.com/apple-oss-distributions/system_cmds/blob/1bca46ecc5b76432f42eb23ec39fe63e8159f251/memory_pressure/memory_pressure.1#L8 https://github.com/apple-oss-distributions/system_cmds/blob/... Looks like the man page for a `memory_pressure` command • freezer.md : https://github.com/apple-oss-distributions/xnu/blob/94d3b452840153a99b38a3a9659680b2a006908e/doc/vm/freezer.md?plain=1#L8 https://github.com/apple-oss-distributions/xnu/blob/94d3b452... # Freezer Details of how some processes can be swapped out to disk. [...] The freezer is a limited form of swap on embedded. Under memory pressure, the freezer picks apps to freeze. (etc) And a whole bunch more. With some digging, it should be possible to find the exact info. :)
- varenc 2y ago
  Whoa great sleuthing! Also fun to see Apple internal documentation in .md format

by varenc 2y ago

justinclift 2y ago

> Memory pressure is an internal macOS system metric Interesting. That'll probably mean it's in the source code Apple publishes for macOS: https://github.com/apple-oss-distributions/distribution-macOS https://github.com/apple-oss-distributions/distribution-macO... Doing a search for the phrase "memory pressure" in the containing organisation (apple-oss-distributions) shows some relevant stuff: https://github.com/search?q=org%3Aapple-oss-distributions+%22memory+pressure%22 https://github.com/search?q=org%3Aapple-oss-distributions+%2... • memorystatus.md : https://github.com/apple-oss-distributions/xnu/blob/94d3b452840153a99b38a3a9659680b2a006908e/doc/vm/memorystatus.md?plain=1#L3 https://github.com/apple-oss-distributions/xnu/blob/94d3b452... # Memorystatus Subsystem Dealing with memory pressure by forcibly recovering pages. (etc) • memory_pressure.1 : https://github.com/apple-oss-distributions/system_cmds/blob/1bca46ecc5b76432f42eb23ec39fe63e8159f251/memory_pressure/memory_pressure.1#L8 https://github.com/apple-oss-distributions/system_cmds/blob/... Looks like the man page for a `memory_pressure` command • freezer.md : https://github.com/apple-oss-distributions/xnu/blob/94d3b452840153a99b38a3a9659680b2a006908e/doc/vm/freezer.md?plain=1#L8 https://github.com/apple-oss-distributions/xnu/blob/94d3b452... # Freezer Details of how some processes can be swapped out to disk. [...] The freezer is a limited form of swap on embedded. Under memory pressure, the freezer picks apps to freeze. (etc) And a whole bunch more. With some digging, it should be possible to find the exact info. :)

varenc 2y ago
Whoa great sleuthing! Also fun to see Apple internal documentation in .md format