Re: [rhn-users] Low on RAM memory warnings

[Edson Manners <emanners realprod acns fsu edu>]

You may have done too much work in this case. I simply use the 'top'
command. If, under normal circumstances, you ar using swap memory then I
usually think it it time to upgrade. You know that you really need to
upgrade if you run top right after a reboot with only your default
programs and services running and you're using swap.

Let me know if you need any clarification.

On Wed, 2003-07-30 at 08:19, snodx hotmail com wrote:
> Dear List.
> 
> I did not find any interface to search this list, so please
> pardon me if this question has already been asked.
> 
> I have Redhat 8.0 installed on a machine which has 128 MB RAM
> and 40 GB hard disk space.
> 
> How do I determine that my system is running low on RAM memory?
> Meaning which particular parameter should reach or not reach some
> value warning me its time to add RAM to my system.
> 
> I searched google for this but I am not getting any guidance for
> Redhat, only for either Solaris or UNIX. For e.g this site:
> 
> http://www.emu.edu.tr/english/facilitiesservices/computercenter/bookslib/Unix%20Unleashed/unx39.htm
> 
> deals with the topic of when to upgrade memory (A search for the phrase
> "low on memory" on this webpage will jump to the particular section I
> am talking about)
> 
> This webpage talks of checking the number of page-outs as a sign of
> low memory. Also there is a mention of running a command sar -wpgr and
> checking the values of pgfree and pgscan. There is a "sar" command in
> Redhat 8.0 but no such switch like -p or -g. Also if I do manage to display
> the "paging" values there is no mention of how many pages are free and
> how many have been scanned .i.e pgfree or pgscan.
> 
> After some more searching I came across this file /proc/stat which displays
> the number of pages read in and the number of pages read out e.t.c but there
> is no clue how to intrepret its output. Same goes for outputs of vmstat, iostat
> e.t.c
> 
> So finally which command-line utility in Redhat 8.0 (no GUI or graphical utilities
> please, I would like to have a common memory monitoring tool which should be
> by default available on all Linux/UNIX/Solaris systems installed with or without
> X-Windows) can display the warning threshold for shortage of memory?
> 
> Sorry for the long winded story here.
> 
> Thanx in advance.
> 
> Eagerly awaiting replies
> 
> SNODX
> 
> 
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-- 
Edson Manners <emanners realprod acns fsu edu>
Florida State University