The Event Count column shows the count of events by:
Event level — The number of times that this event has occurred.
Group level — The total events that occurred within the group.
Category level — The total events that occurred within the category.
By hovering your mouse over an event count, a pop-up message displays the count of events dropped for these reasons:
Overflow – count of events dropped because they cannot be enqueued for logging.
GUI Filter – count of events dropped because the checkbox for Display Events in Log Monitor is disabled, or, if enabled, the event was dropped because of GUI Frequency Filter Interval.
Alert Filter – count of events dropped because the checkbox for Send Events as E-mail Alerts is disabled, or, if enabled, the event was dropped because of Alert Frequency Filter Interval.
Syslog Filter – count of events dropped because the checkbox for Report Events via Syslog is disabled, or, if enabled, the event was dropped because of Syslog Frequency Filter Interval.
Trap Filter - count of events dropped because the checkbox for Report Events via SNMP Trap is disabled, or, if enabled, the event was dropped because of Trap Frequency Filter Interval.
IPFIX Filter - count of events dropped because the checkbox for Report Events via IPFIX is disabled, or, if enabled, the event was dropped because of IPFIX Frequency Filter Interval.
E-mail Filter – count of events dropped because the checkbox for Include Events in Log Digest is disabled, or, if enabled, the event was dropped because of E-mail Frequency Filter Interval.
Priority – count of events dropped because the Event Priority was excluded from Logging Level.
Syslog Event Rate – applies only to Syslogs dropped when Event Rate Limiting is enabled in the Device > Log > Syslog page, and Maximum Events Per Second exceeded the configured threshold.
Syslog Data Rate – applies only to Syslogs dropped when Data Rate Limiting is enabled in the Log > Syslog page, and Maximum Bytes Per Second exceeded the configured threshold.