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+====== vmstat ======
+This is just the man page snapshot for field description
+<code text>
+FIELD DESCRIPTION FOR VM MODE
+   Procs
+       r: The number of processes waiting for run time.
+       b: The number of processes in uninterruptible sleep.
+   Memory
+       swpd: the amount of virtual memory used.
+       free: the amount of idle memory.
+       buff: the amount of memory used as buffers.
+       cache: the amount of memory used as cache.
+       inact: the amount of inactive memory. (-a option)
+       active: the amount of active memory. (-a option)
+   Swap
+       si: Amount of memory swapped in from disk (/s).
+       so: Amount of memory swapped to disk (/s).
+   IO
+       bi: Blocks received from a block device (blocks/s).
+       bo: Blocks sent to a block device (blocks/s).
+   System
+       in: The number of interrupts per second, including the clock.
+       cs: The number of context switches per second.
+   CPU
+       These are percentages of total CPU time.
+       us: Time spent running non-kernel code. (user time, including nice time)
+       sy: Time spent running kernel code. (system time)
+       id: Time spent idle. Prior to Linux 2.5.41, this includes IO-wait time.
+       wa: Time spent waiting for IO. Prior to Linux 2.5.41, included in idle.
+       st: Time stolen from a virtual machine. Prior to Linux 2.6.11, unknown.
+FIELD DESCRIPTION FOR DISK MODE
+   Reads
+       total: Total reads completed successfully
+       merged: grouped reads (resulting in one I/O)
+       sectors: Sectors read successfully
+       ms: milliseconds spent reading
+   Writes
+       total: Total writes completed successfully
+       merged: grouped writes (resulting in one I/O)
+       sectors: Sectors written successfully
+       ms: milliseconds spent writing
+   IO
+       cur: I/O in progress
+       s: seconds spent for I/O
+FIELD DESCRIPTION FOR DISK PARTITION MODE
+       reads: Total number of reads issued to this partition
+       read sectors: Total read sectors for partition
+       writes : Total number of writes issued to this partition
+       requested writes: Total number of write requests made for partition
+FIELD DESCRIPTION FOR SLAB MODE
+       cache: Cache name
+       num: Number of currently active objects
+       total: Total number of available objects
+       size: Size of each object
+       pages: Number of pages with at least one active object
+</code>