PCP is much finer-grained than Zabbix in terms of the metrics it makes available (esp. from the Linux kernel); not sure on Zabbix costs but PCP is quite light on all resources (mem, cpu, net) and very robust.
I've worked on production systems where everything else was failing (hardware, kernel, applications) but PCP kept chugging along, recording and telling the sad story to anyone that would listen.
I've worked on production systems where everything else was failing (hardware, kernel, applications) but PCP kept chugging along, recording and telling the sad story to anyone that would listen.