Monitor¶

top¶

Press "1" in the top command to show individual CPU statistics.

vmstat¶

https://phoenixnap.com/kb/vmstat-command#:~:text=The%20vmstat%20command%20(short%20for,by%20specifying%20a%20sampling%20period.

vmstat [options][delay [count]]
vmstat 1        #output every one second
vmstat 1 5      #output every one second till 5 records
vmstat 1 5 -S M #MBi
vmstat -a       #active and inactive system memory
vmstat -s -S M  #memory and scheduling statistics

strace¶

checks filesystem attributes

strace -c -- /bin/sh -c 'time  (let SUM=0; for i in $(seq 1 1000) ; do SUM+=$i ; stat / > /dev/null; done)'