PMM MySQL network traffic graphs metics values are not constant

Percona Monitoring and Management (PMM) PMM 1.x
1

Hi Team,

Please help me to understand how MySQL Network Traffic dashboard is working on PMM, its values are keep on changing based seleted time range.
If I select Last 6 hours time range, I could see below metric at 11:40 AM
inbound : 1.74 GB
outbound : 289 KB

If I select Last 1 hours time range, I could see below metric at 11:40 AM
inbound : 10.89 GB
outbound : 289 KB

Metrics Queries:
inbound:
rate(mysql_global_status_bytes_received{instance=“$host”}[$interval]) or irate(mysql_global_status_bytes_received{instance=“$host”}[5m])

Outbound:
rate(mysql_global_status_bytes_sent{instance=“$host”}[$interval]) or irate(mysql_global_status_bytes_sent{instance=“$host”}[5m])

I can see huge difference for inbound metrics and some time seeing outbound values also changing

Please help to understand how the graph values are calculating based on selected time rang .

FYI: Attached for your reference.

Thanks,
Jana

compresspng (1).zip (188 KB)