Acrobat CC has suddenly started using excessive amounts of RAM to the point that it is paused and has to be quit and restarted. This also happens if left alone with no files open.
Having pitstop plugin open or not makes no difference. This is on an imac retina 5k late 2014 with 16gbs ram and only started happening Sept 1 2017, Acrobat CC has been installed for at least a year with no issues (and other versions before that have not had this issue).
The RAM usage seems to increase much more quickly if it is an image heavy file open but still happens after a time even if a small vector file is opened, and happens over a couple of hours if no files are open.
Currently I have to restart acrobat at least hourly (usually more often) or all of the software open will be paused and I have to restart the computer.
There is a thread about this on the adobe forums with several others reporting the same issue.

I would like the ability to run usage reports in the Adobe Admin Console.

Ideally, I would like to run reports for application usage and see what users have been using the application in the last 90 days.

I would then like to un-assign any licenses that have not been used in the last 90 days, to free up licenses for other users that require the software.

It would also be beneficial if there were functionality to have this process done automatically. So you set up how long you want licenses to be assigned to users and user not using them, then the console will automatically un-assign licenses from users that haven't used them in that set period.

This request is being submitted at the suggestion of Adobe Support which was unable to provide effective support for Case Nº 0189220198. Of the 252 applications currently installed on our macOS Sierra system, only Acrobat Pro XI cannot be reinstalled or upgraded because the storage volumes are formatted as case-sensitive. The previously case-insensitive system volume on which Acrobat Pro XI version 11.0.20 had previously been installed was converted to a case-sensitive format. This was done by imaging the volume as a DMG file using Disk Utility, and then after reformatting as case-sensitive, the volume was restored using the ditto command in the Terminal. Acrobat Pro XI still runs exactly as it did when the system volume was case-insensitive. Notifications have now been displayed that Acrobat Pro XI should be updated to version 11.0.21 and then to version 11.0.22. Neither the stand-alone updaters nor the automatic updates will complete. Although the error dialogs are misleading, we have confirmed that these update failures occur because the installation scripts detect that the volume format is case-sensitive which causes script execution to terminate. The updaters do not include complete copies of the applications and resources to be updated, so manual update would be very difficult and error prone.

Adobe should do better. It is clear that Acrobat Pro XI is compatible with case-sensitive volumes, as is Adobe Acrobat Reader 2017 which installs and updates without problems. It is obvious that Apple is now focusing upon case-sensitive formats. All iOS devices are case-sensitive, and the new Apple File System was exclusively case-sensitive until late in the beta cycle. The new iOS 11 will include a standard file manager for the first time, so files will be moved between iOS and macOS systems far more often than with earlier system versions. That makes parity of case-sensitivity highly desirable to avoid artificial pathname conflicts. Currently, Adobe is the only known impediment to such parity. Adobe should comprehensively support case-sensitive macOS volume formats as soon as possible. Continued failure to do so will be viewed as inadequate support of the macOS platform.

Basically, make it easier to use Surface Pens and digital stylus with Acrobat Pro. Look at Drawboard PDF, a $10 purchase with lifetime updates. It is 100x more feature-rich for using pen input/stylus input. Please add this into Acrobat so I don't have to switch between PDF programs constantly. Also, for goodness sake, fix the Erase feature. It literally takes a scrubbing to get rid of a stray line while using a pen in Acrobat. Make it like every other program in the world -- when I erase one part of a pen stroke, the whole pen stroke gets erased. Lacking this functionality makes your pen use a punishment. Please fix.