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Full Discussion: Ubuntu 14.04 - how to less ram usage
Top Forums UNIX for Advanced & Expert Users Ubuntu 14.04 - how to less ram usage Post 303029018 by Don Cragun on Saturday 19th of January 2019 06:40:24 PM
Old 01-19-2019
Note that some systems actively try to use otherwise unused memory to speed up running processes. For example, if a process starts reading from a large file, the system might read the next few blocks (or megabytes) of that file into a system buffer so the data will be in memory without having to wait for the disk to rotate if that process reads the next block.

If other processes start up need the memory that was used for read-ahead buffers they can be reallocated to the next process without affecting how fast the new process can be loaded.

Different versions of BSD, Linux, and UNIX systems use different algorithms to try to make efficient use of memory. And, different releases of each of those systems may change the algorithms as the vendors think they have learned something from past experiences.

In other words, there can be lots of "free" memory may be used to hold data that may soon be useful to someone even though it can be re-allocated immediately if someone asks for it to be put to a specific use.
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LEARN ABOUT DEBIAN

jmkmf

JMKMF(1)						      General Commands Manual							  JMKMF(1)

NAME

       jmkmf - runs jmake with the correct options

SYNOPSIS

       jmkmf [ top-level dir [ current dir ] ]

DESCRIPTION

       Jmkmf is a wrapper which calls jmake with the correct options, defining the symbols TOPDIR (location of the top-level directory) and CURDIR
       (current directory). The generated Makefile.SH is then ran through /bin/sh to produce a Makefile.

       Jmkmf is useful when you generate a makefile for the first time.

       When ran without arguments, jmkmf will scan the directories upwards, looking for a .package file marking the top of your sources.  It  will
       then derive the top-level directory and the name of the current directory by itself.

       Once you have a Makefile.SH generated by jmake, and have run Configure already, you can use make Makefile.SH to build the Makefile.SH again
       and make Makefile to run the Makefile.SH through /bin/sh.  To use the recursive commands, you have to append an 's' at the end of the  name
       as in make Makefiles.SH and make Makefiles.

AUTHOR

       Raphael Manfredi <ram@hptnos02.grenoble.hp.com>

FILES

       Jmakefile	   High level description of makefile
       The file marking the top of your package tree

SEE ALSO

       jmake(1), packinit(1).

									ram								  JMKMF(1)
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