I'm having a problem with the graphs of all my devices in observium (screenshots attached). 
What is the advisable crontab settings should I use given the list of devices I am polling? for the list of devices it is in attachment 1


Here are the details of my environment.

Observium	0.13.7.4172
Apache	2.2.15 (CentOS)
PHP	5.3.3
MySQL	5.1.69
RRDtool	1.3.8

Crontab settings:
*/10 * * * *   root    /opt/observium/poller-wrapper.py 1 >> /dev/null 2>&1
*/10 * * * *   root    /opt/observium/poller.php -h all >> /dev/null 2>&1

Recent output of TOP:
top - 00:44:01 up 1 day, 18:35,  1 user,  load average: 2.89, 2.26, 2.24
Tasks: 187 total,   5 running, 182 sleeping,   0 stopped,   0 zombie
Cpu(s): 13.1%us, 65.9%sy,  0.0%ni, 20.5%id,  0.2%wa,  0.0%hi,  0.3%si,  0.0%st
Mem:   5059868k total,   905692k used,  4154176k free,   153836k buffers
Swap:  4161528k total,        0k used,  4161528k free,   481076k cached

List of my devices


Snapshot of one linux mail server


Snapshot of network switch device




Best Regards,
Jerico M. Rubion