Process monitor for RSS size difference

[pmurtey]

Hi All,
We have a process being monitored for it's RSS size so we can alert if it grows to large. We are seeing that after setting the monitor ( proc.mem[,,,BookingService,rss] The Zabbix server is showing the current values of 3030544384, whereas the customer goes and performs a top command and it is showing the resident memory at 2800000000. A difference of 230mb. Why is the zabbix server reporting the 230mb higher difference? Is this something that needs further adjusting somehow. TIA

[cyber]

"man top"

2c. MEMORY Usage
This portion consists of two lines which may express values in kibibytes (KiB) through exbibytes (EiB) depending on the scaling factor enforced with the `E' interactive command.
....
This table may help in interpreting the scaled values displayed:
KiB = kibibyte = 1024 bytes
MiB = mebibyte = 1024 KiB = 1,048,576 bytes
GiB = gibibyte = 1024 MiB = 1,073,741,824 bytes
TiB = tebibyte = 1024 GiB = 1,099,511,627,776 bytes
PiB = pebibyte = 1024 TiB = 1,125,899,906,842,624 bytes
EiB = exbibyte = 1024 PiB = 1,152,921,504,606,846,976 bytes
....
17. RES -- Resident Memory Size (KiB)
The non-swapped physical memory a task is using.

3030544384 bytes (as Zabbix reads it) is 2.822414398193 GiB. Or shortly just 2.8 ...