Re: Memory problems
Jonatan,
In my opinion your virtual machines have a very large memory (4G) if
you only want to run the basic and a few daemons cut it and try again
I belive the buffers are used because you have memory available to
spare...
chptma@refugio:~$ free
total used free shared buffers cached
Mem: 2061076 2019148 41928 0 123156 586100
-/+ buffers/cache: 1309892 751184
Swap: 1959800 0 1959800
I'm running X, firefox, chrome, kde and some daemons...
On Wed, Jun 2, 2010 at 10:06 AM, Jonatan Soto <seniledementia@gmail.com> wrote:
> Hi list,
>
> I'm facing a problem with lenny regarding to memory usage.
>
> I have 4 VM lenny based on top of a VMWare ESXi. The system is running for a
> few days and top command shows a very high amount of memory consumption for
> each server. I have a little knowledge of how linux (kernel 2.6) manages
> memory. A nice resource I found is this:
> http://www.linuxhowtos.org/System/Linux%20Memory%20Management.htm
>
> So, I understand that cached memory may be free if some application requires
> it but I don't understand why lenny is consuming 2GB of physical memory.
> It's worth to mention that all the systems are running with only the
> standard package installed and few additional daemons for each server.
>
> I post what top command shows in order to provide better clues of what's
> going on:
>
> Server1:
> top - 18:47:12 up 12 days, 3:57, 2 users, load average: 0.00, 0.00, 0.00
> Tasks: 53 total, 2 running, 51 sleeping, 0 stopped, 0 zombie
> Mem: 3097764k total, 2901684k used, 196080k free, 156460k buffers
> Swap: 578300k total, 0k used, 578300k free, 592736k cached
> additional daemons -> apache2, bind9, sshd
>
> Server2:
> top - 18:48:30 up 12 days, 2:29, 2 users, load average: 0.00, 0.00, 0.00
> Tasks: 55 total, 1 running, 54 sleeping, 0 stopped, 0 zombie
> Mem: 3097764k total, 2412008k used, 685756k free, 145204k buffers
> Swap: 915664k total, 0k used, 915664k free, 155112k cached
> additional daemons -> apache2, sshd
>
> Server3:
> top - 18:52:10 up 12 days, 2:32, 2 users, load average: 0.00, 0.00, 0.00
> Tasks: 72 total, 1 running, 71 sleeping, 0 stopped, 0 zombie
> Mem: 3097764k total, 2263200k used, 834564k free, 49152k buffers
> Swap: 2928632k total, 0k used, 2928632k free, 107700k cached
> additional daemons -> lvm, sshd
>
> Server4:
> top - 16:50:19 up 1 day, 6:42, 2 users, load average: 0.00, 0.00, 0.00
> Tasks: 58 total, 1 running, 57 sleeping, 0 stopped, 0 zombie
> Mem: 3097764k total, 272300k used, 2825464k free, 126164k buffers
> Swap: 1341388k total, 0k used, 1341388k free, 53196k cached
> additional daemons -> bind9, sldap, samba, sshd
>
> --------------------
>
> Note that I've recently rebooted Server4 and it has lower memory consumption
> rather than the others and it is running more daemons.
> May be this issue is a misconfiguration of my servers or a memory leak?
> Should I tweak something in order to improve memory management?
>
> Any help would be much appreciated.
>
> PD: Apache2 is installed using default configuration of the Apache2 official
> Debian release.
>
>
>
>
>
>
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