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Full Discussion: Shelling Out to Give a System Command Drains Free Memory
Top Forums Programming Shelling Out to Give a System Command Drains Free Memory Post 302553499 by Corona688 on Wednesday 7th of September 2011 06:55:09 PM
Old 09-07-2011
How, exactly, are you measuring "free" memory? It's a common beginner mistake to see "free" low and panic, but it doesn't usually mean you're out of memory -- "cached" is as good as free, so as long as "cached" is high, you've got plenty.

---------- Post updated at 04:55 PM ---------- Previous update was at 04:51 PM ----------

Another thing -- you're saving every single line to a structure in memory. When the output is enormous you'd be better off saving it to a temp file. If it's tiny, saving it to a temp file won't hurt performance because it'll all fit in cache.

Aside from that I don't see anything in this function which would be a memory hog. Depending on what command it's running though, that may end up converting lots of 'free' memory into 'cache' memory (again, harmless.)
 

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LEARN ABOUT FREEBSD

sade

SADE(8) 						    BSD System Manager's Manual 						   SADE(8)

NAME

     sade -- sysadmins disk editor

SYNOPSIS

     sade

DESCRIPTION

     The sade utility is used for various disk administration tasks on FreeBSD systems.

     It is generally invoked without arguments for the default behavior, where the main menu is presented.

NOTES

     The sade utility aims to provide a handy tool for disk management tasks on an already installed system.  The goal is to provide the same text
     interface for disk management in bsdinstall(8) in the post-installation environment.

SEE ALSO

     bsdinstall(8), gpart(8)

HISTORY

     A program called sade first appeared in FreeBSD 6.3 as a utility encapsulating features from the sysinstall(8) installer. It was replaced in
     FreeBSD 10.0 with the equivalent part of bsdinstall(8).

AUTHORS

     Nathan Whitehorn <nwhitehorn@FreeBSD.org>

BUGS

     The utility misses a lot of nice features, such as tools for manipulating gmirror(8).  These will be added later.

BSD
								 December 30, 2012							       BSD
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