There are some indicators showing the FxM is overloaded. Such as
1) Packets drops could be seen occasionally at kernel or NIC level especially when traffic volume is high ( generally the monitored traffic is high and monitored servers are over 100)
2) DB load time is over 3 min and metric "Excess data volume" is larger than 1.
The following log entries could be seen in ecrit log.
agent: (6) Category threshold count/discards: Hit 2 20444
agent: (6) Category threshold count/discards: Page 1 3285