# Interpretating values for Network statistics

**URL:** https://forums.percona.com/t/interpretating-values-for-network-statistics/4019
**Category:** Percona Monitoring Plugins
**Created:** [January 27, 2015, 6:05pm UTC](https://forums.percona.com/t/interpretating-values-for-network-statistics/4019 "2015-01-27T18:05:42Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![supmethods](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@supmethods](https://forums.percona.com/u/supmethods)
#### Post date: [January 27, 2015, 6:05pm UTC](https://forums.percona.com/t/interpretating-values-for-network-statistics/4019/1 "2015-01-27T18:05:42Z")

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Hi

I’ve downloaded and installed the Percona Linux template. I noticed the values for tx-drop had values of ‘m’ and ‘u’ and don’t quite understand why I’m getting values of micro and milli.

I was expecting reading to simply be the number of packet dropped at that point of time but it doesn’t appear so.

So I’m interpreting it as follows:

- A defined time period divided by the number of dropped packets. eg. 12.5m would mean 80 packets dropped within a second. 150u would mean 6666.67 packets dropped within a second (1/150u)

Is this interpretation of the reading correct? Thanks.

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### Author: ![weber](https://avatars.discourse-cdn.com/v4/letter/w/da6949/32.png) [@weber](https://forums.percona.com/u/weber)
#### Post date: [January 28, 2015, 3:26pm UTC](https://forums.percona.com/t/interpretating-values-for-network-statistics/4019/2 "2015-01-28T15:26:35Z")

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TX-drop is constantly increasing counter (derive in Cacti).  
So the daily graph (5 min avg) should reflect a rate of change in packets dropped/sec within 5 min. interval.

The current value on the graph (for derive) is calculated as (prev\_value - cur\_value) / 300.  
If you see 12.5m, it should translate to X / 300 = 12.5m. Therefore, X = 300 \* 12.5/1000 = 3.75 packets dropped within the last 5 min.  
Accordingly, 150u == 0.045 packets.

Of course, it shouldn’t be decimal but may be you were looking to weekly or monthly graph where interval is not 300?

To verify:  
[root@host ~]# cat /proc/net/dev  
Inter-| Receive | Transmit  
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed  
lo:1592496297 2435686 0 0 0 0 0 0 1592496297 2435686 0 0 0 0 0 0  
eth0:6563229868651 4662142281 0 0 0 0 0 66380 354572077461 2642132444 0 164 0 0 0 0

Capture “drop” number at the full 5-min. time, i.e. at XX:X5:00. Wait 5 min. and get the new “drop” number.  
Calculate the change as (prev\_value - cur\_value) / 300 and compare with what is shown on the daily graph.
