SystemStatsOverviewScript

so

get_iostat(){
	echo "IOSTAT | Top 4 Device IO activity"
	iostat -m |awk 'NR == 1 {next} {print}'| head -n 9
}


get_vmstat(){
        echo "\n\nVMSTATS"
        vmstat | awk ' END {print "No_process_waiting_for_CPU: " $1, "\nMemory_Idle: " $4, "\n\nSwapped_In_memory: " $9, "\nSwapped_Out_Memory: " $10, "\n\nCPU_time_runnning_user_code: " $15, "\nCPU_time_runnning_system_code: " $16, "\n\nInterupts_per_sec: " $13, "\nContext_switches_per_sec: " $14} '| column -t
}

get_basic_info(){
        echo "BASIC INFO"
        echo "No of cores":  `nproc`
        echo "Uptime"
        w
}

get_max_thread_running_proc(){
        echo "\n\nMax thread Running process[3rd column is number of threads]"
        ps axo pid,ppid,nlwp,cmd | sort -nr| head -n 5
}

get_highest_memory_proc(){
        echo "\n\nPROCESS WITH HIGEST MEMEORY"
        ps aux| sort -rk 4,4 | head -n 5| awk '{print $2, $4, $11}'| column -t
}

get_highest_cpu_proc(){
        echo "\n\nPROCESS WITH HIGHEST CPU"
        ps aux| sort -rk 3,3 | head -n 5| awk '{print $2, $3, $11}'| column -t
}

get_disk_stats(){
        echo "\n\nDISK USAGE"
        df -Th | sort -rk 6| head -n 3| column -t
}

get_help(){
        printf "\n i: IOSTAT"
        printf "\n d: DISK USAGE"
        printf "\n s: Basic INFO"
        printf "\n c: PROCESS WITH HIGHEST CPU"
        printf "\n m: PROCESS WITH HIGEST MEMEORY"
        printf "\n t: Max thread Running process"
        printf "\n v: VMSTAT"

}


case $1 in
        i)
                get_iostat
        ;;
        d)
        	get_disk_stats
        ;;
        s)
                get_basic_info
        ;;
        c)
                get_highest_cpu_proc
        ;;
        m)
                get_highest_memory_proc
        ;;
        t)
                get_max_thread_running_proc
        ;;
        v)
                get_vmstat
        ;;
        h)
                get_help
        ;;
        help)
                get_help
        ;;
        "")
                get_iostat
                get_vmstat
                get_disk_stats
                get_simple_info
                get_highest_memory_proc
                get_highest_cpu_proc
                get_max_thread_running_proc
        ;;
esac



printf "\n\n"