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Full Discussion: Interpreting Linux's free command output
Top Forums UNIX for Beginners Questions & Answers Interpreting Linux's free command output Post 303010988 by bakunin on Thursday 11th of January 2018 12:04:44 PM
Old 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:
drysdalk
 

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LEARN ABOUT DEBIAN

globus_url_t

globus_url_t(3) 						   globus common						   globus_url_t(3)

NAME

       globus_url_t -

SYNOPSIS

   Data Fields
       char * scheme
       globus_url_scheme_t scheme_type
       char * user
       char * password
       char * host
       unsigned short port
       char * url_path
       char * dn
       char * attributes
       char * scope
       char * filter
       char * url_specific_part

Detailed Description
       Parsed URLs.

       This structure contains the fields which were parsed from an string representation of an URL. There are no methods to access fields of this
       structure.

Field Documentation
   char* globus_url_t::scheme
       A string containing the URL's scheme (http, ftp, etc)

   globus_url_scheme_t globus_url_t::scheme_type
       An enumerated scheme type. This is derived from the scheme string

   char* globus_url_t::user
       The username portion of the URL. [ftp, gsiftp]

   char* globus_url_t::password
       The user's password from the URL. [ftp, gsiftp]

   char* globus_url_t::host
       The host name or IP address of the URL. [ftp, gsiftp, http, https, ldap, x-nexus

   unsigned short globus_url_t::port
       The TCP port number of the service providing the URL [ftp, gsiftp, http, https, ldap, x-nexus].

   char* globus_url_t::url_path
       The path name of the resource on the service providing the URL. [ftp, gsiftp, http, https]

   char* globus_url_t::dn
       The distinguished name for the base of an LDAP search. [ldap]

   char* globus_url_t::attributes
       The list of attributes which should be returned from an LDAP search. [ldap]

   char* globus_url_t::scope
       The scope of an LDAP search. [ldap]

   char* globus_url_t::filter
       The filter to be applied to an LDAP search [ldap].

   char* globus_url_t::url_specific_part
       An unparsed string containing the remaining text after the optional host and port of an unknown URL, or the contents of a x-gass-cache URL
       [x-gass-cache, unknown].

Author
       Generated automatically by Doxygen for globus common from the source code.

Version 14.7							  Tue Nov 27 2012						   globus_url_t(3)
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