# Understanding tag throughput and latency

**URL:** <https://forum.inductiveautomation.com/t/understanding-tag-throughput-and-latency/11056>\
**Category:** General Discussion\
**Created:** [January 17, 2016, 5:33pm UTC](https://forum.inductiveautomation.com/t/understanding-tag-throughput-and-latency/11056 "2016-01-17T17:33:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tkelch](https://avatars.discourse-cdn.com/v4/letter/t/ccd318/32.png) [@tkelch](https://forum.inductiveautomation.com/u/tkelch)\
**Post date:** [January 17, 2016, 5:33pm UTC](https://forum.inductiveautomation.com/t/understanding-tag-throughput-and-latency/11056/1 "2016-01-17T17:33:21Z")

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When investigating latency, throughput and general comm issues, the OPC-UA\>Devices (diagnostics) page seems like it could incredibly useful.

Is there any guide explaining what everything means (ex: aggregate-request-count, aggregate-throughput, request-count@1000 etc, 99th percentile, FiveMinuteRate) and how it can be practically applied to debugging communication issues?