Memory usage on rhel Dell 2650 box

[Sudhir Damle]

Thanks Matt, 

The system is ON for a month now. I believe there is not much io other than
writing to log files (I am not sure if that counts for caching). 

I tried to tar large folders on the machine and that took cache to about 3.5
GB, and after and hour it came back to normal 800 MB. 

I believe that is due to the age_buffer parameter. My other two machines are
similar ones, but for them the buffer is not coming down. I do not have
bdflush rpm installed on any of them. 

Is there any way to check age_buffer parameter?

Thanks for your help. 

Sudhir Damle


-----Original Message-----
From: Matt Domsch [mailto:Matt_Domsch at dell.com] 
Sent: Wednesday, October 04, 2006 8:00 PM
To: Sudhir Damle
Cc: linux-poweredge at lists.us.dell.com
Subject: Re: Memory usage on rhel Dell 2650 box

On Wed, Oct 04, 2006 at 01:59:49PM -0700, Sudhir Damle wrote:
> Hello, 
> 
> I have Dell 2640 with kernel 2.6, 4 GB ram, I am expecting it to use most
of
> the memory for disk cache and show very little memory as free witg free -m
> command, similar to other boxes. 
> 
> The cache size is only 818 MB, and free memory is 2661 MB, Any ideas why
> this machine is behaving differently than others.
> 
> /proc/meminfo is below.


Has the system been on very long?  Has it had reason to access the
disk much?  Perhaps the processes aren't doing much I/O for memory to be
used for cache?

-- 
Matt Domsch
Software Architect
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com