device status "Unknown" for all new devices

[JimDiGriz]

Dear Cacti community,

I faced with issue in my environment when I add a new device, create a list of graphs for it the status is "Unknown". Device itself is reachable, cacti gets snmp info and ping response back.
Downed Device Detection method - "Ping and SNMP uptime".
I have added 285 devices manually without any issues, but above this amount all new ones become "Unknown".
I checked all possible cases with similar issue, but no one matched my case.

Has anyone faced with similar issue? Any idea how to solve it? Seems like a performance issue and amount of more than 285 devices gets cacti stop working properly.

My setup info:

Cacti Version 1.2.15
Cacti OS unix
NET-SNMP Version NET-SNMP version: 5.7.2
RRDtool Version Configured 1.4.0+
RRDtool Version Found 1.4.8
Devices 283
Graphs 13,478
Data Sources Script/Command: 10
SNMP Get: 136
SNMP Query: 13,316
Total: 13,462

Interval 300
Type SPINE 1.2.15
Items Action[0]: 26,768
Action[1]: 10
Total: 26,778
Concurrent Processes 2
Max Threads 12
PHP Servers 3
Script Timeout 25
Max OID 10
Last Run Statistics Time:278.0279
Method: spine
Processes:4
Threads:1
Hosts:283
HostsPerProcess:71
DataSources:26778
RRDsProcessed:13322

[cigamit]

Your poller is taking a long time to complete. Can you display your stats line from the log?
I would increase your procs/threads under Data Collectors.

[JimDiGriz]

Looks like you're right. I checked Data Collector settings for my main poller and increased process to 8 (was 1) and Threads to 8 (was 1).
I'm going to add 200+ devices there and will see how it helps.

[JimDiGriz]

Your poller is taking a long time to complete. Can you display your stats line from the log?
I would increase your procs/threads under Data Collectors.

Could you please advise for number procs/threads ? I've set a VM CentOs 7.x with 4 vCPU and 8 GB RAM.

[cigamit]

Typically I do 1 Process per vCPU (some people do 2), and then ~12 threads. I then tune the threads up or down based upon the load on my Cacti server.

[JimDiGriz]

Thanks for advice!

My issue was resolved with this tune, much appreciated for your help!

[emil0512]

Hi. I have also issues on the unknown devices. May I know where can I see the Process? As I checked, threads was 1 and I switched to 6. But still in unknown state. Kindly help. TY.

[JimDiGriz]

Hi. I have also issues on the unknown devices. May I know where can I see the Process? As I checked, threads was 1 and I switched to 6. But still in unknown state. Kindly help. TY.

What is your cacti version ? Is it a new installation? My issue was with amount of running devices, cacti itself was working well.

[emil0512]

Hi. Cacti Version 1.2.15. Same scenario on the original post except for add new device. ICMP and ping are working fine but the devices is unknown. Realtime graph is working.

[emil0512]

I mean SNMP is good and ping. But still unknown device.

[cigamit]

Post your STATS line from the cacti log.