Linux performance measurement

minial memory consuption

while true
do
    current_time=$(date "+%Y%m%d-%H:%M:%S")
    memory_usage=$(free -m | awk 'NR==2{printf "%.2f%%\t\t", $3*100/$2}')
    echo "${current_time} ${memory_usage}" | tee -a ~/memory_usage.txt
    sleep 5
done

sar

# sar

## show cpu for whole day
sar

## cpu: every second for the next 5 intervals/seconds
sar -u 1 5

## ram
### %commit - memory usage (inclduing swap)
### %memusage memory including virtual memory
sar -r 1 5


## disk
### %util - approximate usage of disks. Not reliable for ssds or raid systems
sar -d 1 5


## network
sar -n ALL 1 5

## combined
sar -urb 1 5
sar -urbn ALL 1 5

# save in file
sar -urb 1 5 -o ./sarout.file

# save to file and run in backround
sar -urb 1 5 -o ./sarout.file >/dev/null 2>&1 &

# sadf

## csv
# sadf -dh -- <sar command>
sadf -dh -- -urb

## json
# sadf -j -- <sar command>
sadf -j -- -urb

## create sar file and read it into csv

sar -urb 1 5 -o ./sarout.file
sadf -dh sarout.file > sarout.csv


## create sar file and read it into csv in backround

sar -urb 1 5 -o ./sarout.file >/dev/null 2>&1 &
sadf -dh sarout.file > sarout.csv &