9145 Views 4 Replies
      Latest reply on Nov 27, 2018 1:36 AM by appleboy
      antwerpenr Level 1 Level 1 (0 points)
      antwerpenr Sep 30, 2016 10:20 PM

        It is top of CPU usage on on iMac27 but absent on my MacBook Pro - both running Sierra 10.12.   It is typically around 15-40% and 30% more CPU Time than kernel_task (next highest) over an extended period.

         

        Google search does not bring up very much and nothing useful that I could find...

        • Re: What is IDECacheDeleteAppExtension process for?
          eskimo Apple Staff Apple Staff (13,425 points)
          eskimo Oct 3, 2016 1:39 AM (in response to antwerpenr)

          CacheDelete is a subsystem within macOS that cleans up disk space in response to high-level demand for that space.  It’s the back end to the very-rarely-used CSDiskSpaceStartRecovery API.  CacheDelete has a plug-in mechanism whereby various system components can plug in to recover disk space associated with that component.  It looks like Xcode ships with an app extension that implements such a plug-in:

          $ find /Applications/Xcode.app -name IDECacheDeleteAppExtension.appex
/Applications/Xcode.app/Contents/PlugIns/IDECacheDeleteAppExtension.appex

          IMPORTANT While CSDiskSpaceStartRecovery is public API, this plug-in mechanism is not.

          I don’t know why this plug-in would be burning through CPU but the general strategy for things like this is:

          Please post your bug number here, just for the record.

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          Apple Developer Relations, Developer Technical Support, Core OS/Hardware
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          • Re: What is IDECacheDeleteAppExtension process for?
            appleboy Level 1 Level 1 (0 points)
            appleboy Nov 27, 2018 1:36 AM (in response to antwerpenr)

            My errors were pointing to something in /Applications/Xcode.app, so I just deleted Xcode.