Five books whose title begins with M ?
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Those (and other) system limits are stored in a CRAMFS image file.
The general process to change something would be:
* Copy the CRAMFS image somewhere (perhaps off-kindle)
* Mount the image
* As 'root', do an exact copy of the files to a writable file system
* Use the KDB utility to read/write/re-set the limit desired.
* Re-create a CRAMFS image from the writable file system
* **USE A TEMPORARY** means to make the system use your customized limits database image (such as a manual umount/mount sequence). Something you can recover from with a full re-boot.
* Close (i.e: Stop) anything that was using the old limits (such as kdb and cvm - both catch the settings). You **MUST** get the old files 'closed' somehow (because of how inode file systems work).
* Restart whatever you stopped, in the proper order
* test until you are blue in the face. then test some more.
(If you are normally blue skinned, test until you are red in the face.)
Only then consider replacing the Amazon CRAMFS image file with your customized image file.