[ Thanks to Ramsai
for this link. ]
“Understanding Diagnostics Logs: System
The most complicated of all the log pages is the System log page.
Here, FreeBSD logs information about the system, its hardware, and
the startup process. At first, this page can seem intimidating but
with a little help, this page can be very helpful particularly in
tracking down hardware or driver related problems.“50 Log Entries Might Not be Enough
The default number of log entries shown on the Diagnostics: Logs
page is 50. For most situations, this will be sufficient but there
can be times when it is not enough. For example in the Diagnostics:
Logs: System tab, the total number of log entries made during the
boot up process is more than 50. If you want to see how much system
memory has been recognized by FreeBSD, you won’t find it within the
standard 50 entries. The solution is to increase the Number of log
entries to show parameter on the Diagnostics: Logs: Setting
tab.“The best way to learn to read the Diagnostics: Logs: System
page is by example, below are several different log entry examples
including logs about the CPU, memory, disks, and disk
controllers:”