Enhancing performance on Server

Richard Hubbell richard.hubbell at gmail.com
Wed Jan 26 06:23:09 UTC 2005


First find out what your users are doing to your server.
That means gather some data.
get disk data
network data
cpu
memory

You could use sar to gather the data.

Gather a couple of weeks worth, then you can change as needed.
You may just need to tweak applications.  e.g. samba

My guess would be the network is a bottle neck but get the facts
and act on the facts.

Richard

p.s. fedora-list seems to be a free-for-all, has it always been?


On Wed, 26 Jan 2005 05:59:09 -0000, James Marcinek
<jmarc1 at jemconsult.biz> wrote:
> I am trying to enhance the performance of a linux server, running FC3, for a
> small office of about 14 users. The system is provding several of the following
> services:
> 
>  Samba running as a Domain Controller
>  Samba File server
>  HylaFAX server
>  vsftp server (to support HylaFAX)
>  Postfix (to support email notices)
>  Amanda Server (running after hours backups)
> 
> The server is running a pentium IV (not sure on the speed at the moment, and has
> 1.5 Gigs of RAM, hardware based SCSI raid (PCI SCSI card) and external modem.
> 
> >From the system monitoring that I've been periodically checking, the CPU is in
> good shape as well as the RAM. However, the loggin in and off of user's is felt
> on the network. The Samba environment was just converted from a Workgroup to a
> domain. The local user profiles were copied and converted to roaming, in
> addition to changing the local home directory from the default C: location to
> their $HOME drives on the Samba Domain controller. Each domain user id was
> logged in to their respective PC, which will download a copy to the local PC to
> expedite the logon/logoff process. However it still takes time to logoff and
> save settings, etc. Some of the problems may be due to the fact the user's were
> previously saving large files (like music, etc) in their home folder. I'm sure
> this will alleviate some items.
> 
> When I use the tops command during the logon/logoff periods, I do see samba
> spiking the CPU to higher limits, though still acceptable. A lot of physical RAM
> is also used, which is one area I think could be addressed; however the paging
> space doesn't look to active...
> 
> I'm wondering if the bottleneck is in the network card. The whole network is
> 100BaseT. I haven't used a lot of network tools (mainly netstat) so I'd be
> interested to hear of some good ones. Also if there are any suggestions based
> off of past experiences.
> 
> I do have one thing that I am considering but don't know if it's practical (or
> feasible) and that is putting another network card onto the network. Now I've
> never done this but heard that the cards could be bound, or one card accepting
> packets and one would be for sending. I'd be extremely interested in hearing if
> it's possible and how it can be done. I'd also like to hear of any pros and cons
> to this or any other suggestions.
> 
> Thanks,
> 
> James
> 
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