Im using Cacti version 0.8.8 along with spine and rrdtool version 1.4.5 and Im getting gaps on some graphs of CPU usage.
I already tried changing the max value of the rrd both in cacti and using rrdtool tune.
On the logs I see that the values are correctly fetched by the poller:
root@mgm-cacti:/servers/apache/htdocs/cacti/log# tail -f cacti.log |grep Host\\[1085 |grep cpu_system
05/08/2013 03:04:14 PM - SPINE: Poller[0] Host[1085] TH[1] DS[31186] SNMP: v2: 10.135.191.111, dsname: cpu_system, oid: .1.3.6.1.4.1.2021.11.52.0, value: 3734384
05/08/2013 03:09:00 PM - SPINE: Poller[0] Host[1085] TH[1] DS[31186] SNMP: v2: 10.135.191.111, dsname: cpu_system, oid: .1.3.6.1.4.1.2021.11.52.0, value: 3734817
05/08/2013 03:14:18 PM - SPINE: Poller[0] Host[1085] TH[1] DS[31186] SNMP: v2: 10.135.191.111, dsname: cpu_system, oid: .1.3.6.1.4.1.2021.11.52.0, value: 3735313
05/08/2013 03:18:44 PM - SPINE: Poller[0] Host[1085] TH[1] DS[31186] SNMP: v2: 10.135.191.111, dsname: cpu_system, oid: .1.3.6.1.4.1.2021.11.52.0, value: 3735885
05/08/2013 03:24:17 PM - SPINE: Poller[0] Host[1085] TH[1] DS[31186] SNMP: v2: 10.135.191.111, dsname: cpu_system, oid: .1.3.6.1.4.1.2021.11.52.0, value: 3736616
05/08/2013 03:29:04 PM - SPINE: Poller[0] Host[1085] TH[1] DS[31186] SNMP: v2: 10.135.191.111, dsname: cpu_system, oid: .1.3.6.1.4.1.2021.11.52.0, value: 3737051
05/08/2013 03:34:08 PM - SPINE: Poller[0] Host[1085] TH[1] DS[31186] SNMP: v2: 10.135.191.111, dsname: cpu_system, oid: .1.3.6.1.4.1.2021.11.52.0, value: 3737520
05/08/2013 03:38:56 PM - SPINE: Poller[0] Host[1085] TH[1] DS[31186] SNMP: v2: 10.135.191.111, dsname: cpu_system, oid: .1.3.6.1.4.1.2021.11.52.0, value: 3737954
But not correctly written to the rra by the rrdtool update:
root@mgm-cacti:/servers/apache/htdocs/cacti/log# tail -f cacti.log |grep rrdtool |grep mongodb-node01 |grep cpu_system
05/08/2013 03:04:15 PM - POLLER: Poller[0] CACTI2RRD: /servers/rrdtool/bin/rrdtool update /servers/apache/htdocs/cacti-0.8.8a/rra/mongodb-node01_cpu_system_31186.rrd --template cpu_system 1368021854:3734384
05/08/2013 03:09:00 PM - POLLER: Poller[0] CACTI2RRD: /servers/rrdtool/bin/rrdtool update /servers/apache/htdocs/cacti-0.8.8a/rra/mongodb-node01_cpu_system_31186.rrd --template cpu_system 1368022140:3734817
05/08/2013 03:14:18 PM - POLLER: Poller[0] CACTI2RRD: /servers/rrdtool/bin/rrdtool update /servers/apache/htdocs/cacti-0.8.8a/rra/mongodb-node01_cpu_system_31186.rrd --template cpu_system 1368022458:3735313
05/08/2013 03:18:45 PM - POLLER: Poller[0] CACTI2RRD: /servers/rrdtool/bin/rrdtool update /servers/apache/htdocs/cacti-0.8.8a/rra/mongodb-node01_cpu_system_31186.rrd --template cpu_system 1368022724:U
05/08/2013 03:24:18 PM - POLLER: Poller[0] CACTI2RRD: /servers/rrdtool/bin/rrdtool update /servers/apache/htdocs/cacti-0.8.8a/rra/mongodb-node01_cpu_system_31186.rrd --template cpu_system 1368023057:3736616
05/08/2013 03:29:05 PM - POLLER: Poller[0] CACTI2RRD: /servers/rrdtool/bin/rrdtool update /servers/apache/htdocs/cacti-0.8.8a/rra/mongodb-node01_cpu_system_31186.rrd --template cpu_system 1368023344:3737051
05/08/2013 03:34:08 PM - POLLER: Poller[0] CACTI2RRD: /servers/rrdtool/bin/rrdtool update /servers/apache/htdocs/cacti-0.8.8a/rra/mongodb-node01_cpu_system_31186.rrd --template cpu_system 1368023648:3737520
As you can see once in a while it writes a "U" even tough it read a perfectly usable numeric value.
Can you give me some pointers to what migth be going wrong ?? If there is data that I missed please ask for what you need.
Thanks in advance
