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Flow graph is flattened in traffic peaks





The flow graph (flows per second) in the Monitoring Center - Analysis is flattened for some or all flow sources. Especially when traffic rise is expected:



Product: Flowmon Collector

Version: Any

Platform: Any

Question/Problem Description:

Flows are being dropped.

Steps to Reproduce:  
Error Message:  
Defect Number:  
Enhancement Number:  
Cause: The flow collection backend is overloaded.

1) Check the bandwidth for an interface collecting flow data (eth0 or eth1). Connect to SSH and run

sar -n DEV 1 3

2) In Distributed Architecture, check the link between proxy and slave units with the command above.

3) Disable syslog parsing in the Configuration Center - System - System Settings - Syslog Server. This feature can limit a listening port performance to about 50k flows per second. 


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