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Re: [Spacewalk-list] Spacewalk performance tuning for deployments with 1000+ hosts



Hi,

I don't think spacewalk proxy would help in this case.

One case where this hits you is scheduling config file deployment,
eg. deploy all file of a config channel to all systems subscribed
to the channel for a larger number of systems, in my test-case it
happened for > 400 systems.

See https://bugzilla.redhat.com/show_bug.cgi?id=1087844

I also don't think that Oracle would do any better, it looks like
spacewalk is sending the SQL Queries sequentially.

Also the missing parallelism is not the only problem, I've also
analyzed the SQL queries and observed, comparing 300 and 400 systems,
the total number of queries was  2172 for 300 systems and 4021 for 400
systems.

A workaround could be an API script to schedule the config deployment
actions.

Regards,

Stephan

On 11/21/2014 06:49 AM, Krzysztof Pawłowski wrote:
> Hello Amedeo,
> Does all spacewalk proxy use the same database server or i'm wrong ?
> 
> 2014-10-29 16:56 GMT+01:00 Amedeo Salvati <amedeo oscert net <mailto:amedeo oscert net>>:
> 
>     this will scale out (not scale UP) your env, but you will change where your client will be connected -> to spacewalk or to spacewalk proxy
> 
>     Da: spacewalk-list-bounces redhat com <mailto:spacewalk-list-bounces redhat com>
>     A: spacewalk-list redhat com <mailto:spacewalk-list redhat com>
>     Cc:
>     Data: Wed, 29 Oct 2014 15:49:09 +0100
>     Oggetto: Re: [Spacewalk-list] Spacewalk performance tuning for deployments with 1000+ hosts
> 
>     > Does this solve problem with web ui ?
> 
>     > Sent from my Windows Phone
>     --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>     > From: Amedeo Salvati <mailto:amedeo oscert net>
>     > Sent: ‎2014-‎10-‎29 12:03
>     > To: spacewalk-list redhat com <mailto:spacewalk-list redhat com>
>     > Cc: spacewalk-list redhat com <mailto:spacewalk-list redhat com>
>     > Subject: Re: [Spacewalk-list]Spacewalk performance tuning for deployments with 1000+ hosts
> 
>     > repeat I think you must use rhn|spacewalk proxies
> 
>     > best regards
>     > a
> 
> 
>     > Da: spacewalk-list-bounces redhat com <mailto:spacewalk-list-bounces redhat com>
>     > A: spacewalk-list redhat com <mailto:spacewalk-list redhat com>
>     > Cc:
>     > Data: Wed, 29 Oct 2014 07:22:30 +0100
>     > Oggetto: Re: [Spacewalk-list] Spacewalk performance tuning for deployments with 1000+ hosts
> 
>     > > Unfortunately it doesn't help :(
> 
>     > > When i want do sth with all 1500 systems i get :
> 
> 
>       > > Service Temporarily Unavailable
> 
>     > > The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
> 
> 
> 
>     > > 2014-10-28 17:41 GMT+01:00 Matthew Madey <mattmadey gmail com <mailto:mattmadey gmail com>>:
> 
> 
>         > > Here are some configurations you might find helpful for tuning Apache\Tomcat\Java\Networking.. Like others have mentioned.. when you get over 1000+ clients, it's a good idea to start
>         scaling horizontally with Spacewalk Proxies. We use 4 proxies in our production environment and are servicing 8000+ clients. We can actually patch 1600 clients at a time and the GUI is still
>         pretty responsive. Can't guarantee this will resolve your issue, but this worked for us. 
> 
>         > > Add maxThreads to /etc/tomcat6/server.xml____
> 
>         __> >  __
> 
>         > >     <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" URIEncoding="UTF-8" address="127.0.0.1" maxThreads="1024" maxKeepAliveRequests="1000"/>____
> 
>         > >     <!-- A "Connector" using the shared thread pool-->____
> 
>         > >     <!--____
> 
>         > >     <Connector executor="tomcatThreadPool"____
> 
>         > >                port="8080" protocol="HTTP/1.1" ____
> 
>         > >                connectionTimeout="20000" ____
> 
>         > >                redirectPort="8443" />____
> 
>         __> >  __
> 
>         > >     <!-- Define an AJP 1.3 Connector on port 8009 -->____
> 
>         > >     <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" URIEncoding="UTF-8" address="127.0.0.1" maxThreads="1024"/>____
> 
>         > >   ____
> 
>         > >     <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" URIEncoding="UTF-8" address="::1" maxThreads="1024"/>____
> 
>         __> >  __
> 
>         __> >   
> 
>         > > Tune Apache to service more requests /etc/httpd/conf.d/zz-spacewalk-server.conf____
> 
>         __> >  __
> 
>         __> >  __
> 
>         > > #######################################################____
> 
>         > > # Authorship and versioning info____
> 
>         > > # $Author$____
> 
>         > > # $Date$____
> 
>         > > # $URL$____
> 
>         > > # $Rev$____
> 
>         > > # deployment_location: /etc/httpd/conf.d/____
> 
>         > > #######################################################____
> 
>         > > # ** DO NOT EDIT **____
> 
>         > > # Master configuration file for the rhn_server setup____
> 
>         > > #____
> 
>         __> >  __
> 
>         > > ##____
> 
>         > > ## Spacewalk settings____
> 
>         > > ##____
> 
>         __> >  __
> 
>         > > <VirtualHost *>____
> 
>         __> >  __
> 
>         > > <IfModule mod_jk.c>____
> 
>         > >     # Inherit the mod_jk settings defined in zz-spacewalk-www.conf____
> 
>         > >     JkMountCopy On____
> 
>         > > </IfModule>____
> 
>         __> >  __
> 
>         > > <Directory "/var/www/html/*">____
> 
>         > >         AllowOverride all____
> 
>         > > </Directory>____
> 
>         __> >  __
> 
>         > > RewriteEngine on____
> 
>         > > RewriteOptions inherit____
> 
>         > > </VirtualHost>____
> 
>         __> >  __
> 
>         > > # Override default httpd prefork settings____
> 
>         > > <IfModule prefork.c>____
> 
>         > > StartServers       8____
> 
>         > > MinSpareServers    400____
> 
>         > > MaxSpareServers   400____
> 
>         > > ServerLimit      1024____
> 
>         > > MaxClients       1024____
> 
>         > > MaxRequestsPerChild  200____
> 
>         > > </IfModule>____
> 
>         __> >  __
> 
>         > > Include /etc/rhn/satellite-httpd/conf/rhn/rhn_monitoring.conf____
> 
>         __> >  __
> 
>         __> >  __
> 
>         __> >  __
> 
>         __> >  Also added some network tuning to /etc/sysctl.conf
> 
>         __> >  __
> 
>         > > net.ipv4.icmp_echo_ignore_broadcasts = 1____
> 
>         > > net.ipv4.conf.all.secure_redirects = 0____
> 
>         > > net.ipv4.tcp_max_syn_backlog = 8192____
> 
>         > > net.ipv4.conf.default.secure_redirects = 0____
> 
>         > > net.ipv4.tcp_syncookies = 1____
> 
>         > > net.ipv4.conf.all.accept_source_route = 0____
> 
>         > > net.ipv4.conf.all.rp_filter = 1____
> 
>         > > net.ipv4.conf.all.send_redirects = 0____
> 
>         > > net.ipv4.conf.default.accept_redirects = 0____
> 
>         > > net.ipv4.conf.all.accept_redirects = 0____
> 
>         > > net.ipv4.conf.default.send_redirects = 0____
> 
>         > > net.core.somaxconn = 1536____
> 
>         > > net.core.dev_weight = 512____
> 
>         > > ##3x normal for a queue and budget suited to networks greater than 100mbps____
> 
>         > > net.core.netdev_budget = 10000____
> 
>         > > net.core.netdev_max_backlog = 30000
> 
> 
> 
>         > > Depending on the amount of memory on your Spacewalk server, you may want to increase your JAVA_OPTS Xms and Xmx settings to something a little higher. Typically only needed if you are seeing Java Heap out of memory errors in your Spacewalk logs.
> 
> 
> 
>         > > On Tue, Oct 28, 2014 at 11:21 AM, Waldirio Manhães Pinheiro <waldirio gmail com <mailto:waldirio gmail com>> wrote:
> 
>             > > Dear Krzysztof
> 
>             > > Have you checked your numa configuration ?!
> 
>             > > Maybe you can customize you environment to use the same bus to application / memory.
> 
>             > > ______________
>             > > Atenciosamente
>             > > Waldirio
>             > > msn: waldirio gmail com <mailto:waldirio gmail com>
>             > > Skype: waldirio
>             > > Site: www.waldirio.com.br <http://www.waldirio.com.br>
>             > > Blog: blog.waldirio.com.br <http://blog.waldirio.com.br>
>             > > LinkedIn: http://br.linkedin.com/pub/waldirio-pinheiro/22/b21/646
>             > > PGP: www.waldirio.com.br/public.html <http://www.waldirio.com.br/public.html>
> 
>             > > On Tue, Oct 28, 2014 at 2:10 PM, Krzysztof Pawłowski <msciciel msciciel eu <mailto:msciciel msciciel eu>> wrote:
> 
>                 > > We have dedicated machine for db pgsql (16GB RAM , 8 cores)  and seperate for spacewalk (16GB RAM, 8 Cores).
> 
>                 > > I think that problem is with enormous number of queries to database. During such request db is not utilized 100% and spacewalk is also not 100% utilized.
> 
> 
> 
>                 > > 2014-10-28 16:25 GMT+01:00 Götz Reinicke - IT Koordinator <goetz reinicke filmakademie de <mailto:goetz reinicke filmakademie de>>:
> 
>                     > > Hi,
>                     > > Am 28.10.14 um 12:57 schrieb Krzysztof Pawłowski:
>                     > > > Hi,
>                     > > > Is there any guide about tuning spacewalk performance ? With every new
>                     > > > host spacewalk is getting slowly. Using SSM with more than 200-300 hosts
>                     > > > is impossible due timeouts. It's also not possible to deploy config
>                     > > > files to all hosts.
>                     > > > Standard java tuning was done, java gc is not the problem now.
>                     > > >
>                     > > > Any suggestions ?
> 
>                     > > what server hardware do you use? What is the systemload while performing
>                     > > that tasks? CPU, RAM, Disksystem, IO, Network .... ?
> 
> 
>                     > >         /Götz
> 
>                     > > --
>                     > > Götz Reinicke
>                     > > IT-Koordinator
> 
>                     > > Tel. +49 7141 969 82 420 <tel:%2B49%207141%20969%2082%20420>
>                     > > E-Mail goetz reinicke filmakademie de <mailto:goetz reinicke filmakademie de>
> 
>                     > > Filmakademie Baden-Württemberg GmbH
>                     > > Akademiehof 10
>                     > > 71638 Ludwigsburg
>                     > > www.filmakademie.de <http://www.filmakademie.de>
> 
>                     > > Eintragung Amtsgericht Stuttgart HRB 205016
> 
>                     > > Vorsitzender des Aufsichtsrats: Jürgen Walter MdL
> 
> 
>     > [The entire original message is not included.]
> 
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> 
> 
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