Thank you for the information, this and your previous reply.  Both very helpful.


From: spacewalk-list-boun...@redhat.com <spacewalk-list-boun...@redhat.com> on 
behalf of Ree, Jan-Albert van <j.a.v....@marin.nl>
Sent: Thursday, October 13, 2016 12:41 PM
To: spacewalk-list@redhat.com
Subject: Re: [Spacewalk-list] How to improve WUI performance

Pushing larger updates to ALL clients at once is a bad idea as soon as you go 
over 20-30 clients already...

Our SW server (Scientific Linux 7, SW 2.5) is physical, with 64GB RAM. 6 cores 
and a solid RAID drive set. As soon as I for instance update some software on 
one of our HPC clusters, as soon as I allow more than 20-25 clients to pull 
simultaneous I start getting tracebacks in my mailbox... specially if the 
updates become larger (new kernels, new nVidia CUDA suite, new LibreOffice)  I 
would try to move to CentOS/RHEL/ScientificLinux 7 for your new install, the 
later PostgreSQL version in it is a lot more efficient which helps speed up 
your SW instance.

When I moved to a new server I didn't want to pull all the history (and some 
poor choices/mistakes from the past) so I set up a clean new server, with the 
proper channels/configs/packages and then on the old server selected batches of 
clients to which I pushed a script which registered them with the new server.

This worked very well for us and allowed us to test and tweak the setup (it was 
during this phase on the new server that we noticed the OSAD issues and managed 
to solve it with moving to sqlite3) before moving to full production.

What helped us debug/fix OSA issues was the script from post 
https://www.redhat.com/archives/spacewalk-list/2014-May/msg00124.html ; great 
to easily track which nodes are not working as expected.




Jan-Albert van Ree | Linux System Administrator | MARIN Support Group
MARIN | T +31 317 49 35 48 | j.a.v....@marin.nl<mailto:j.a.v....@marin.nl> | 

[LinkedIn]<https://www.linkedin.com/company/marin> [YouTube] 
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MARIN news: Software seminar in Shanghai for the first 

From: spacewalk-list-boun...@redhat.com <spacewalk-list-boun...@redhat.com> on 
behalf of Konstantin Raskoshnyi <konra...@gmail.com>
Sent: Thursday, October 13, 2016 19:19
To: spacewalk-list@redhat.com
Subject: Re: [Spacewalk-list] How to improve WUI performance

Hm..do you use osad? Just try to push updates for all of your clients and see 
what happens ;)

On Thu, Oct 13, 2016 at 10:08 AM, Coffman, Anthony J 
<tony.coff...@snapon.com<mailto:tony.coff...@snapon.com>> wrote:

Spacewalk 2.5 (with 3 remote proxies)
CentOS 6.8 VM (running stock Postgres 8.4)
4 vCPUs
12GB memory

550 clients (CentOS/OracleLinux/EL5/6/7 with a sprinkling of Ubuntu and SuSE 
thrown in)A

The System page in the WebUI loads in about 4-6 seconds (faster when the cache 
is warm).

I’ve done essentially no tuning except for changing the proxy timeout (due to 
issue with the large updateinfo size for Oracle Linux).

Looking at our memory utilization we could probably get away with 6-8GB of 
memory for our workload.

Hope this data point is useful.


 On Behalf Of Daryl Rose
Sent: Thursday, October 13, 2016 12:25 PM
To: spacewalk-list@redhat.com<mailto:spacewalk-list@redhat.com>
Subject: Re: [Spacewalk-list] How to improve WUI performance

I am actually leaning to moving to a physical server.  I have a server in the 
closet that is dual CPU, 8 core, 64GB of RAM.  I was originally thinking that 
it was a bit of over kill, but after reading this reply, perhaps its sized 

If I do move to a physical, can I migrate everything from the original SW 
server to the replacement server?  Can I export the database and import it 
over?  Migrate repositories over?  I am using a signed certificates, and I 
would like to continue using the same machine name and configuration.  Do I 
have to re-register these servers?  Its taken me a while to get 465 added in, 
and I don't want to have to re-register everything, especially since I continue 
adding on a daily bases.



on behalf of Konstantin Raskoshnyi 
Sent: Thursday, October 13, 2016 10:43 AM
To: spacewalk-list@redhat.com<mailto:spacewalk-list@redhat.com>
Subject: Re: [Spacewalk-list] How to improve WUI performance

You need bare metal high performance machine.
We have 400 machines and use xeon7 24cores with 64 of ram.
Plus tuning: Postgres, Linux, tomcat

On Thursday, October 13, 2016, Daryl Rose 
<darylr...@outlook.com<mailto:darylr...@outlook.com>> wrote:

I have 465 servers in my SW environment, and I keep adding more everyday.  When 
finished, I'll have nearly a thousand servers in the environment.

My SW server is a virtual RHEL 6.6, SW v2.3.  I have four CPU's and four Gigs 
of memory allocated to the server.

Whenever I select "Systems" from the main menu a single CPU pegs at 100%, and 
it takes several minutes for the page to come up.  It appears that 
osa-dispatcher is what is using up the CPU.  osa-dispatcher is often at 99 to 

Is there  a way to performance tune SW?  Can I configure SW to use all four 
CPU's, or should I add additional CPU's, can configure SW to use all assigned 



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