LINUX Statistics

 

System

CPU (%)
        User Time spent running non-kernel code. (user time, including nice time).
        System Time spent running kernel code. (system time).
        Wait IO Time spent waiting for IO. Prior to Linux 2.5.41, shown as zero.
        Idle Time spent idle. Prior to Linux 2.5.41, this includes IO-wait time.
Memory (MB)
        VM Used The amount of virtual memory used.
        Used as buffers The amount of memory used as buffers.
        Used as cache The amount of memory used as cache.
        Idle The amount of idle memory.
Swap (KB/s)
        Swapped in Amount of memory swapped in from disk.
        Swapped out Amount of memory swapped to disk.
IO (Blocks/s)
        Received. Blocks received from a block device.
        Sent Blocks sent to a block device.
Kernel Threads
        Waiting for run time The number of processes waiting for run time..
        Uninterruptible sleep The number of processes in uninterruptible sleep..

Processes

Processes
        Total  
        Sleeping Sleeping.
        Runnable Process is on run queue.
        Uninterruptible Sleep Uninterruptible sleep (usually IO).
        Traced Traced or stopped.
        Zombie A defunct process.
        Paging  
        Dead  
%CPU
        %CPU The ratio of CPU time used recently to CPU time available in the same period, expressed as a percentage.
Memory (MB)
        VSZ Total VM size..
        RSS The resident set size.

CPU

CPU Utilization
        User Show the percentage of CPU utilization that occurred while executing at the user level (application)..
        System Show the percentage of CPU utilization that occurred while executing at the system level (kernel). Note that this does not include the time spent servicing interrupts or softirqs.
        Nice Show the percentage of CPU utilization that occurred while executing at the user level with nice priority.
        Wait IO Show the percentage of time that the CPU or CPUs were idle during which the system had an outstanding disk I/O request.
        Irq Show the percentage of time spent by the CPU or CPUs to service interrupts.
        Soft Show the percentage of time spent by the CPU or CPUs to service softirqs. A softirq (software interrupt) is one of up to 32 enumerated software interrupts which can run on multiple CPUs at once.
        Idle Show the percentage of time that the CPU or CPUs were idle and the system did not have an outstanding disk I/O request.
Interrupts (Unit/s)
        Interrupts Show the total number of interrupts received per second by the CPU or CPUs..

Disks IO

Read/Write Operations (Unit/s)
        Read The number of read requests that were issued to the device per second.
        Write The number of write requests that were issued to the device per second.
CPU Time
        %util Percentage of CPU time during which I/O requests were issued to the device (bandwidth utilization for the device). Device saturation occurs when this value is close to 100%.
Queue Length
        Length The average queue length of the requests that were issued to the device.
Service Time (ms)
        Total The average time (in milliseconds) for I/O requests issued to the device to be served. This includes the time spent by the requests in queue and the time spent servicing them.
        Service The average service time (in milliseconds) for I/O requests that were issued to the device.
Network
Connections
        ESTABLISHED Connection has been established.
        TIME_WAIT Wait after close for remote shutdown retransmission.
        CLOSE_WAIT Remote shutdown; waiting for the socket to close.
        SYN_RECEIVED Initial synchronization of the connection under way.
        SYN_SENT Actively trying to establish connection.
Packets OK (Unit/s)
        Received Packets received error free.
        Transmitted Packets transmitted error free.
Packets with errors (Unit/s)
        Recv. Errors Packets received damaged.
        Recv. Dropped Packets received dropped.
        Recv. Overrun Packets lost because of an overrun..
        Trans. Errors Packets transmitted damaged.
        Trans. Dropped Packets transmitted dropped.
        Trans. Overrun Packets lost because of an overrun..

FileSystem

Usage History (MB)
        Size  
        Used  
        Available  




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