Graph Gap

[gutotknet]

Hi,
I'm having some problems with my graphs. I think that can be my hardware, however I don't know how to measure how much I need. See what I have
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description: CPU
product: Intel(R) Pentium(R) 4 CPU 3.00GHz
Memory, 1,5Gb DDR400
description: ATA Disk product: MB0500EBNCR logical name: /db_mysql
ATA 160GB for /

Attached my "ping" graph gap and summary of zabbix.

[Denis Bond]

Same Issue.
Once you set the range for several days it seems fine, but turn into the mess once you zoom into 1d or several hours.

Will appreciate any help.

[ingus.vilnis]

Hello!

There might be some Zabbix server performance issues.
In Zabbix Frontend go to Monitoring -> Graphs select your Zabbix server from top right dropdown and take a look at various server performance graphs. Maybe you will notice some issues there.

This performance tuning articles could also be useful for you:

http://blog.zabbix.com/monitoring-how-busy-zabbix-processes-are/457/

http://www.zabbix.com/img/zabconf201...nce_Tuning.pdf

If you are using the default settings in your zabbix_server.conf file then try to increase the amount of pollers.

And check Administration -> Queue . Red fields also indicate performance issues.

Best regards,
Ingus

[Denis Bond]

you know, I've just found this thread. Seems to be useful.
I have this issue on Gigi interfaces.
You can take a look at it as well.

https://www.zabbix.com/forum/showthread.php?t=25084&highlight=Graph

https://support.zabbix.com/browse/ZBXNEXT-2188

http://www.cisco.com/c/en/us/support/docs/ip/simple-network-management-protocol-snmp/26007-faq-snmpcounter.html

[Denis Bond]

you are right.
My Queuing looks terrible way off the perfect example they have in the documentation.
Do you have any idea how to adjust (fix) it.

[ingus.vilnis]

You can try to increase the value of "StartPollers" parameter in your zabbix_server.conf file.

Please report back if that did improve your queue!

Best Regards,
Ingus

[Denis Bond]

This is my zabbix_server.conf file.
What is a reasonable parameters for the poller settings?

Thanks for your previous reply. I really appreciate your help.

[ingus.vilnis]

You can set it to like 10 or so for a test.

* Note: you have to uncomment that StartPollers line.

Restart zabbix_server process after you have made any changes to config file.

Before and after that please check your Zabbix server performance graphs at Monitoring -> Graphs and filter out your Zabbix server. You will find many interesting stats in the graphs there. Check if changing amount of pollers will make any improvements.

How many pollers should you have? Well, it depends on the amount of Hosts and Items you monitor. The best is to keep the poller count as low as it keeps your server on low load.

[Denis Bond]

Hello again.
It seems like an issue is still there after all the changes I did.

[Denis Bond]

Another discovery I made indicates that this issue appear only when you want to see the graphs from the Cisco devices.
3925 Routers
2951 Routers return the solid graphs without any gaps.
I wonder if it's related to the items I configured. I executed the snmpwalk on the zabbix box and confirmed I apply the right OIDs to the interfaces. The pollers return the correct values in the table, but shows the broken graph once you click on show the past hour graph.

[ingus.vilnis]

Try changing option Timeout in zabbix_server.conf and see if it helps.
Did you restart zabbix_server after you made changes to conf file?

[Denis Bond]

Are you talking about this section?

[ingus.vilnis]

Yes. Let's see if it helps.

[Denis Bond]

Negative.
Still the same

[aib]

Could you confirm that you increase Timeout up to 30, restart Zabbix Server and still getting the graphs with gaps?

It would be nice to see any information about this Item from zabbix_server.log