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Re: Bash monopolizing or eating the RAM MEMORY

From: John McKown
Subject: Re: Bash monopolizing or eating the RAM MEMORY
Date: Mon, 20 Mar 2017 11:59:07 -0500

On Mon, Mar 20, 2017 at 10:17 AM, Noilson Caio <address@hidden> wrote:
Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-redhat-linux-gnu' -DCONF_VENDOR='redhat' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib  -D_GNU_SOURCE -DRECYCLES_PIDS -DDEFAULT_PATH_VALUE='/usr/local/bin:/usr/bin'  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches   -m64 -mtune=generic
uname output: Linux SPFBL-POC-CENTOS-7 3.10.0-514.2.2.el7.x86_64 #1 SMP Tue Dec 6 23:06:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-redhat-linux-gnu

Bash Version: 4.2
Patch Level: 46
Release Status: release

Hello bash crew. 
My name is Noilson Caio and i assume that there is something weird/strange in bash. I'm working with huge folder structures and a lot of files every day and the best way to describe the 'problem' is using a example.

Example task: Build a folder structure using 0-9 at 2 levels
Something like that:

​I understand your problem. But what do you want BASH to do about it? BASH is a generalized command processor. You have found that it is possible to give a "reasonable" command which exhausts your available memory. No offense intended, but _I_ would consider that a "user error". It is no different from what I saw on another forum for the R language. The user exhausted memory by trying to read in a CSV file, the entire thing at once, which was about 1 million lines (rows) containing hundreds of values per row. Solution: buy a more powerful computer with, say, about 512 GiB of memory. It'll only set you back about $2,000 U.S.; example (not recommendation): http://www.thinkmate.com/system/rax-xs4-1160v4​. Honestly: you need to change your algorithm for processing your problem. In your example, perhaps a series of nested loops.

"Irrigation of the land with seawater desalinated by fusion power is ancient. It's called 'rain'." -- Michael McClary, in alt.fusion

Maranatha! <><
John McKown

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