1. top works.
2. changes from malloc will be reflected in the display
3.
This requires more of an answer. To get memory for malloc to work with, especially 50MB chunks, the OS has to call brk() on behalf of the process. brk() maps more memory for the data segment into the process. Since brk() is an expensive call and you have to call brk() with a negative argument to "give memory back" most OS's do not do that. This is on the assumption that if the program called for that chunk of memory it may be called for again in the future. So, processes do not normally "shrink" during runtime.
Hellp all,
if there is 3G memory in my Unix server I want to know if all the 3G space can be used by ong sigle process. As i know, in Windows, one process can only access at most 1G memory despite there is probably more than 1G memory is equipped. (1 Reply)
Hi Unix Gurus i am somewhat new to unix scripting so need your help to
create a script as below.
# This script would find the process consuming memory beyond a certain #limit. if the meemory consumption is more than 100% for a period of 1
# minute for the specific process. the script would... (0 Replies)
hi,
For some special reason , I'd like to control the memory address for the shared libraries in my dynamically linked process.
And it is the "ld" which interpret the dynamically linked library, and in my system, the "ld-linux.so.2" is put at 0x00812000. Then I use "prelink -r" command to change... (0 Replies)
hi,
For some special reason , I'd like to control the memory address for the shared libraries in my dynamically linked process.
And it is the "ld" which interpret the dynamically linked library, and in my system, the "ld-linux.so.2" is put at 0x00812000. Then I use "prelink -r" command to... (3 Replies)
Can someone please help me with a script that will help in identifying the CPU & memory usage by a process name, rather than a process id.This is to primarily analyze the consumption of resources, for performance tweaking.
G (4 Replies)
Hi Experts,
Our servers running Solaris 10 with SAP Application. The memory utilization always >90%, but the process on SAP is too less even nothing.
Why memory utilization on solaris always looks high?
I have statement about memory on solaris, is this true:
Memory in solaris is used for... (4 Replies)
I want to run a C program on my linux machine. I want to allocate specific heap size for that process (C program) to run.
How can I do that?
I know in Java same can be done using -Xmx option.
There may be some option which I can specify in the C program like Java or may be in linux process. (8 Replies)
Hello All,
So it goes like this...
I logged in to the HMC console , trying to change the memory of LPAR from 20 to 25 GB . It says that "your profile is configured to use maximum of only 20 GB" and not able to increase the memory.
I created a new profile and filled "maximum memory " field... (4 Replies)
Hello,
I am running ubuntu 14.04 in a server with 32GB ram.
Due to receiving "high load" errors during ssh connection, I took a look at what's happening from command line. I detected that 20GB of total memory was allocated to a program.
Below you can see some initial part of installation... (4 Replies)
Discussion started by: baris35
4 Replies
LEARN ABOUT CENTOS
filechan
FILECHAN(8) System Manager's Manual FILECHAN(8)NAME
filechan - file-writing backend for InterNetNews
SYNOPSIS
filechan [ -d directory ] [ -f fields ] [ -m mapfile ] [ -p pidfile ]
DESCRIPTION
Filechan reads lines from standard input and copies certain fields in each line into files named by other fields within the line. Filechan
is intended to be called by innd(8) as a channel feed. (It is not a full exploder and does not accept commands; see newsfeeds(5) for a
description of the difference and buffchan(8) for an exploder program.)
Filechan input is interpreted as a set of lines. Each line contains a fixed number of initial fields, followed by a variable number of
filename fields. All fields in a line are separated by whitespace. The default number of initial fields is one.
For each line of input, filechan writes the initial fields, separated by whitespace and followed by a newline, to each of the files named
in the filename fields. When writing to a file, filechan opens it in append mode and tries to lock it and change the ownership to the user
and group who owns the directory where the file is being written.
OPTIONS -f The ``-f'' flag may be used to specify a different number of fields.
-d By default, filechan writes its arguments into the directory /var/spool/news/out.going. The ``-d'' flag may be used to specify a
directory the program should change to before starting.
-p If the ``-p'' flag is used, the program will write a line containing its process ID (in text) to the specified file.
If filechan is invoked with ``-f 2'' and given the following input:
news/software/b/132 <1643@munnari.oz.au> foo uunet
news/software/b/133 <102060@litchi.foo.com> uunet munnari
comp/sources/unix/2002 <999@news.foo.com> foo uunet munnari
Then the file foo will have these lines:
news/software/b/132 <1643@munnari.oz.au>
comp/sources/unix/2002 <999@news.foo.com>
the file munnari will have these lines:
news/software/b/133 <102060@litchi.foo.com>
comp/sources/unix/2002 <999@news.foo.com>
and the file uunet will have these lines:
news/software/b/132 <1643@munnari.oz.au>
news/software/b/133 <102060@litchi.foo.com>
comp/sources/unix/2002 <999@news.foo.com>
Because the time window in which a file is open is very small, complicated flushing and locking protocols are not needed; a mv(1) followed
by a sleep(1) for a couple of seconds is sufficient.
-m A map file may be specified by using the ``-m'' flag. Blank lines and lines starting with a number sign (``#'') are ignored. All
other lines should have two host names separated by a colon. The first field is the name that may appear in the input stream; the
second field names the file to be used when the name in the first field appears. For example, the following map file may be used to
map the short names above to the full domain names:
# This is a comment
uunet:news.uu.net
foo:foo.com
munnari:munnari.oz.au
HISTORY
Written by Robert Elz <kre@munnari.oz.au>, flags added by Rich $alz <rsalz@uunet.uu.net>. This is revision 1.19, dated 1996/10/29.
SEE ALSO buffchan(8), innd(8), newsfeeds(5).
FILECHAN(8)