Vmstat output item

Vmstat output item # vmstat1procs ----------- memory ------------- swap ------- io ----- system ------ cpu ---- prepare vmstat output item # vmstat 1 procs ----------- memory -------- --- swap -- ----- io -----system -- ---- cpu ---- r B swpd free buff cache si so bi bo in cs us sy id wa 1 0 252 1566792 310940 5117772 0 0 2 101 1 11 2 0 97 0 0 0 252 1566784 310940 0 0 0 0 0 0 4836 10015 1 0 100 0 0 252 1566784 310940 5117776 0 0 0 4880 0 0 0 10070 0 0 0 0 100 252 1566784 310940 0 0 0 5117776 0 0 4952 0 10137 0 1 0 252 1566784 310940 5117776 0 0 0 5056 10222 0 0 100 0 0 0 252 1566784 310940 5117776 0 0 0 4996 0 0 0 0 0 0 0 10220 100 252 0 0 0 0 0 0 0 0 0 5128 10443 0 1 99 0 0 0 252 1566784 310940 5117776 0 0 0 5150 0 0 0 10368 0 0 0 0 100 252 1566784 310940 0 0 0 5117776 0 1 5132 0 0 0 0 0 252 1566784 310940 5117776 0 0 0 5127 0 0 10380 0 0 0 0 100 252 1566784 310940 0 0 0 5117776 0 0 0 0 5212 10485 100 0 0 0 0 0 252 0 0 0 0 0 0 16 5270 10530 0 0 99 1 1 0 252 1566784 310940 5117780 0 0 0 5329 0 0 0 10615 0 0 0 1 0 100 252 1566784 310940 0 0 0 5117800 1 0 0 0 0 1 0 0 1 1 0 252 1566784 310940 5117800 0 0 0 5013 0 0 10213 0 0 man vmstat: [cpp] field description for vm mode Procs r: The number of processes waiting for run time. (number of processes) B: The number of processes in uninterruptible sleep. (number of blocked processes) Memory swpd: the amount of virtual memory used. free: the amount of idle memory. buff: the amount of memory used as buffers. (Virtual memory used for write operations) cache: the amount of memory used as cache. (Virtual memory used for read operations) 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 ). (swap the memory size from the disk) so: Amount of memory swapped to disk (/s ). (swap from memory to disk size) 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) (CPU usage) sy: Time spent running kernel code. (system time) (CPU used by the system) id: Time spent idle. prior to Linux 2.5.41, this includes des IO-wait time. (idle CPU) wa: Time spent waiting for IO. prior to Linux 2.5.41, encoded in idle. (The Time spent waiting for I/O) 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 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 NOTES vmstat does not require special permissions. these reports are intended to help identify system bottlenecks. linux vmstat does not count itself as a running process. all linux blocks are currently 1024 bytes. old kernels may report blocks as 512 bytes, 2048 bytes, or 4096 bytes. since procps 3.1.9, vmstat lets you choose units (k, K, m, M) default is K (1024 bytes) in the default mode vmstat uses slabinfo 1.1 fixme files/proc/meminfo/proc/stat/proc/*/stat see also iostat (1), sar (1 ), mpstat (1), ps (1), top (1), free (1) BUGS Does not tabulate the block io per device or count the number of system CILS. AUTHORS Written by Henry Ware. fabian Frederick (Diskstat, slab, partitions...) Throatwobbler Ginkgo Labs