[Spacewalk-list] Spacewalk CPU lack / Scaling

[Nahelou Sébastien]

Hi Spacewalk lovers

Since we upgrade from 2.0 to 2.2, we encounter a capacity problem due to CPU usage overall.
When users load a system page in the GUI, the tomcat process grow to 90% usage. Api and GUI become unavailable or very slow.

Our architecture is as following:
5 rhn proxies
LVS Master/slave mode
1 front master: SERVICES="jabberd $TOMCAT httpd osa-dispatcher Monitoring MonitoringScout rhn-search cobblerd taskomatic"
1 front slave: SERVICES="jabberd $TOMCAT httpd osa-dispatcher Monitoring MonitoringScout "
1 cluster PGSQL

Our masters have 2* Intel(R) Xeon(R) CPU E5-2609 / 92 RAM / raid 1 using CentOS 6.5.

We have about 6000 systems registered,  about 40 organizations and more than 600 channels (including cloned)

My questions are:
- Is it possible to scale spacewalk horizontally ? By changing lvs configuration to Active/Active ? By using HAProxy ? other ?
- Is it possible to tune tomcat better than adding memory ? (we use actually -Xms8196m -Xmx16384m)
- What is the maximum number of systems that we can register in 1 organisation ? (Actually our max seems to be 1700)
- Is there a maximum number of systems that we can register in a Spacewalk cluster ?

Thank in advance

Sébastien NAHELOU
System engineer
Worldline - Seclin - France


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