On Thu, Jan 03, 2019 at 11:17:03PM +0530, Kaushal Shriyan wrote:

I am running ClamAV process which is invoked by Cron scheduler around 3:00 AM ( Midnight) on remote server running CentOS Linux release 7.6.1810 (Core). Is there a way to measure what was the system resources consumptions like CPU, Network, I/O, Memory and Computing load is being used and is it possible to find out how much time it took to complete the scan?

The easiest thing I can think of would be to prepend the command in the crontab with /usr/bin/time (or '/usr/bin/time -v' to get the output to be more verbose).

You'll get something like this (example using 'dd'):

$ /usr/bin/time -v dd if=/dev/urandom of=/dev/null count=500 bs=1M 500+0 records in 500+0 records out 524288000 bytes (524 MB, 500 MiB) copied, 2.19242 s, 239 MB/s Command being timed: "dd if=/dev/urandom of=/dev/null count=500 bs=1M" User time (seconds): 0.00 System time (seconds): 2.19 Percent of CPU this job got: 99% Elapsed (wall clock) time (h:mm:ss or m:ss): 0:02.19 Average shared text size (kbytes): 0 Average unshared data size (kbytes): 0 Average stack size (kbytes): 0 Average total size (kbytes): 0 Maximum resident set size (kbytes): 3140 Average resident set size (kbytes): 0 Major (requiring I/O) page faults: 0 Minor (reclaiming a frame) page faults: 342 Voluntary context switches: 1 Involuntary context switches: 24 Swaps: 0 File system inputs: 0 File system outputs: 0 Socket messages sent: 0 Socket messages received: 0 Signals delivered: 0 Page size (bytes): 4096 Exit status: 0