Observium doesn't create graphs anymore

Really current recomendation is just "do not touch" this settings
Not sure why you want to change it.
But only what I can offer undocumented accurate graphs, but you should know, it will extremely increase size of rrd files and rrd dir (over x6 times)!

// 925kB per DS                           93 days of 5 min         187.5 days of 30 min    366 days of 2 hour       4 years of 1 day

$config['rrd']['rra']  = "RRA:AVERAGE:0.5:1:26784  RRA:AVERAGE:0.5:6:9000  RRA:AVERAGE:0.5:24:4392  RRA:AVERAGE:0.5:288:1460 ";

$config['rrd']['rra'] .= "                         RRA:MIN:0.5:6:9000      RRA:MIN:0.5:24:4392      RRA:MIN:0.5:288:1460 ";

$config['rrd']['rra'] .= "                         RRA:MAX:0.5:6:9000      RRA:MAX:0.5:24:4392      RRA:MAX:0.5:288:1460 ";

P.S. But better really do not change this settings if you not sure how this works

What are the recommended settings for the rrd part of the config?
Do I need to configure anything there?
Our config looks like this at the moment :

observium-rrd-settings.txt

Hrm, wait..

You was changed default rrd configs?

$config['rrd']['step'], $config['rrd']['rra']

I see not our default values in poller:

RRD CMD[create /opt/observium/rrd/aristar1.ost/status.rrd DS:status:GAUGE:120:0:1 --step 60 RRA:AVERAGE:0.5:0.5:20160 RRA:AVERAGE:0.5:1:89280 RRA:AVERAGE:0.5:1:172800 RRA:AVERAGE:0.5:10:69120 RRA:MIN:0.5:1:89280 RRA:MIN:0.5:1:172800 RRA:MIN:0.5:10:69120 RRA:MAX:0.5:1:89280 RRA:MAX:0.5:1:172800 RRA:MAX:0.5:10:69120 ]

RRD RUNTIME[0.0014s]

RRD STDOUT[ERROR: Invalid step 0.5: value has trailing garbage]

RRD_STATUS[FALSE]

This is why rrd files not created.
Currently we not support any other step/rra other than default 300s!

Thanks for the quick reply! I added the screenshots.

Thanks for debug info, but this was an automatic answer

Please take additional steps regarding your problem:

• open any broken graph (with "Error Drawing Graph", ie "Device avialability")
• click on "RRD Command" link (top right)
• make screenshot of this page.

I've attached the required information. Those are just a few of the devices, that aren't working properly. 

Please make and attach additional information about the device:

• full snmp dump from device:

  snmpwalk -v2c -c <community> --hexOutputLength=0 -ObentxU <hostname> .1 > myagent.snmpwalk

  snmpwalk -v2c -c <community> --hexOutputLength=0 -ObentxU <hostname> .1.3.6.1.4.1 >> myagent.snmpwalk

  If device not support SNMP version 2c, replace -v2c with -v1.

• If you have problems with discovery or poller processes, please do and attach these debugs:

  ./discovery.php -d -h <device>

  ./poller.php -d -h <device>

• additionally attach device and/or vendor specific MIB files

Note, this comment is added automatically.