Perfmon Monitoring - Gaps in Data (Zero Value)

[yaseensuleman]

Hi there, some background on the issue we are experiencing

We are using Zabbix to log Perfmon Counters / Data - the item has been configured and is collecting data per set interval (30 seconds) however randomly we are seeing gaps in the data
See the graph below and you can see the gaps - from what i can see is Zabbix is logging data but with a zero values -> I have also confirmed by looking @ the actual perfmon data file and can confirm that there is data with values greater than 0 for all these times

What we have tried so far to resolve the issue

1. I have checked the Zabbix queue to see if there is a backlog in processing times -> no backlog on the quue
2. The Agent / Host was setup as passive - tried to change to Active setup and still the same issue
3. We use a proxy to collect the data - so the Server and host in question are on different environments - we even tried bypassing the proxy and letting the Zabbix Agent log directly to the server and no luck,

Current Setup
1. Zabbix Sever (7.0) running on Docker on Oracle Linux
2. Host is a Windows Server running Zabbix Agent2 6.4.0 - we tried with Agent2 7.0 but were getting the following error "Critical failure: unaligned 64-bit atomic operation" - this was resolved by downgrading the Agent to 6.4

Not sure if anyone else has experienced the above - would really appreciate some guidance

Thanks

[Markku]

Who does the "per second" calculation, Zabbix or the perfmon counter?

I mean, if the Zabbix item is set to calculate the "change per second" in the preprocessing step, then it is natural that sometimes you see data values greater than zero in the original data and then Zabbix calculates it as zero, if the original data value hasn't changed after the previous check.

Markku