01-11-2018
Quote:
Originally Posted by
drysdalk
I would imagine that under normal circumstances the kernel would choose to allocate memory from the free pool first, before flushing out buffers, cache or anything else.
In principle: yes. You
can change this behavior to some extent by setting kernel tuning parameters but for most purposes the default behavior does quite OK so that this is not necessary. Here, for instance, is a document describing some of the tuning possibilities:
http://docs.gluster.org/en/latest/Administrator%20Guide/Linux%20Kernel%20Tuning/
for a very short introduction what performance tuning is about you might also read this
introduction i once wrote.
Before you try that or anything else in this regard: notice that the result can be really catastrophic! Experiment a lot (on a test system, of course), but treat it like open-heart surgery: this can do a dramatic lot of good if you know what you do but it can prove catastrophic results when you don't. Don't be shy, but be careful.
I hope this helps.
bakunin
This User Gave Thanks to bakunin For This Post:
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I know that free command displays memory usages however I like to know how the option and the results when I use this command..
PLease respond ASAP
thanx... I am a newbie.. :D (1 Reply)
Discussion started by: LiTo
1 Replies
2. UNIX for Dummies Questions & Answers
Hi there again,
Running Solaris 10 with built-in Java. Seems to compile and run fine.
Problem is: Say I want to see contents of current directory. In a shell, I'd just write "ls" and it outputs the content.
When I write a Java file, I have the following line:
System.out.println("ls");
... (1 Reply)
Discussion started by: EugeneG
1 Replies
3. Shell Programming and Scripting
Hi All
I have something that from the outset seems really trivial but in practice is not quite working.
I have the following code sample in my shell script which illustrates the problem
echo "enter home directory"
read home
mkdir $home/newdir
The user then enters a logical $HOME... (3 Replies)
Discussion started by: kingpin2502
3 Replies
4. UNIX for Dummies Questions & Answers
hi all,
when I run-
wcars1j5#netstat -an | grep 8090
127.0.0.1.8090 *.* 0 0 49152 0 LISTEN
wcars1j5#
1. does this mean that no one is connected to this port?
Regards,
akash (1 Reply)
Discussion started by: akash_mahakode
1 Replies
5. UNIX for Dummies Questions & Answers
I am having trouble figuring this one out.....Is this a 2CPU or a 4CPU v490 with 16GB? I think it is a 2CPU system, looking for confirmation.
$ prtdiag
System Configuration: Sun Microsystems sun4u Sun Fire V490
System clock frequency: 150 MHz
Memory size: 16384 Megabytes
... (1 Reply)
Discussion started by: config_boy
1 Replies
6. UNIX for Advanced & Expert Users
Hello, I need some help to interpret the below output...
What is -/+ buffers/cache?
My understanding is, total RAM is 3986152 Bytes, used RAM is 3950904 bytes.
What is buffers and cached?? Can any one please interpret this output? It would be great help if some one can help me on this?
... (2 Replies)
Discussion started by: govindts
2 Replies
7. Red Hat
Hi Friends,
I am really confused with the output of "free" command on redhat linux.
I can see caching and buffer output on two different areas on the output.
Please let me know whats the difference of these two different outputs.
Here I am pasting the command output of my server.
# free... (3 Replies)
Discussion started by: arumon
3 Replies
8. Solaris
Hi. I wonder what the equal sign in front of the answer means.
I have read man pages and googled but found no answer.
xntpdc -p
=15.5.64.3 15.5.2.51 3 512 377 0.02060 0.057426 0.04965Thanks.
Jan (1 Reply)
Discussion started by: vettec3
1 Replies
9. Shell Programming and Scripting
Hi All,
I have a file with name
Is there a LINUX command that will help me to output the word after the 9th Underscore(_).
ie the output should be DLY in this case.
Can anybody pls help me.
Thanks much in advance,
Freddie (4 Replies)
Discussion started by: dsfreddie
4 Replies
10. Red Hat
I wanted to know the concept of free -m command as there are different rows of Mem, -/+ buffers/cache & Swap in the output. As an example, it is showing 195 as free Mem in my server but 13850 in the free section of the -/+ buffers/cache row. The output needs in depth knowledge of the different... (7 Replies)
Discussion started by: RHCE
7 Replies
LEARN ABOUT DEBIAN
hxcopy
HXCOPY(1) HTML-XML-utils HXCOPY(1)
NAME
hxcopy - copy an HTML file and update its relative links
SYNOPSIS
hxcopy [ -i old-URL ] [ -o new-URL ] [ file-or-URL [ file-or-URL ] ]
DESCRIPTION
The hxcopy command copies its first argument to its second argument, while updating relative links. The input is assumed to be HTML or
XHTML and may be slightly reformatted in the process.
If the second argument is omitted, hxcopy writes to standard output. In this case the option -o is required. If the first argument is also
omitted, hxcopy reads from standard input. In this case the option -i is required.
OPTIONS
The following options are supported:
-i old-URL
For the purposes of updating relative links, act as if old-URL is the location from which the input is copied. If this option is
omitted, the actual location of the first argument is used for calculating relative links.
-o new-URL
For the purposed of updating relative links, act as if new-URL is the location to which the input is copied. If this option is
omitted, the actual location of the second argument is used for calculating relative links.
ENVIRONMENT
To use a proxy to retrieve remote files, set the environment variables http_proxy and ftp_proxy. E.g., http_proxy="http://localhost:8080/"
BUGS
Unlike the last argument of cp(1), the last argument of hxcopy must be a file, not a directory.
The second argument must be a local file. Writing to a URL is not yet implemented. To work around this, replace hxcopy file.html
http://example.org/file.html by hxcopy -o http://example.org/file.html file.html tmp.html and then upload tmp.html to the given URL with
some other command, such as curl(1). The first argument, however, may be a URL. hxcopy will download the given file. (Currently only HTTP
is supported.)
EXAMPLE
Assume the HTML file foo.html contains a relative link to "../bar.html". Here are some examples of commands:
hxcopy foo.html bar/foo.html
The file foo.html is copied to ../bar/foo.html and the relative link to "../bar.html" becomes "../../bar.html".
hxcopy foo.html ../foo.html
The file foo.html is copied to ../foo.html and the relative link to "../bar.html" is rewritten as "bar.html".
hxcopy -i http://my.org/dir1/foo.html -o http://my.org/foo.html file1.html file2.html
The file file1.html is copied to file2.html and the relative link to "../bar.html" is rewritten as "bar.html". A command like this
may be useful to update files that are later uploaded to a server.
SEE ALSO
cp(1), curl(1), hxwls(1)
6.x 9 Dec 2008 HXCOPY(1)