What does Sar provides and at which location Sar logs are stored ?

Question

When UE is powered on, it first scans for all supported RF channels. And then list the channels whose RSSI is greater than a set threshold. For all cells satisfying this criteria, the PSS, SSS detection-> PCFICH -> MIB detection is done.
I would like to understand the term "preferred Rat" to camp on to a cell. How/when does the UE gets this information? Is this a stored info from USIM .. or from somewhere else?

Answer 1

Sar Collect, report, or save system activity information. The default version of the sar command (CPU utilization report) might be one of the first facilities the user runs to begin system activity investigation, because it monitors major system resources. If CPU utilization is near 100 percent (user + nice + system), the workload sampled is CPU-bound.

By default log files of Sar command is located at /var/log/sa/sadd file, where the dd parameter indicates the current day.