# Kernel VMStat Input Plugin The kernel_vmstat plugin gathers virtual memory statistics by reading /proc/vmstat. For a full list of available fields see the /proc/vmstat section of the [proc man page](http://man7.org/linux/man-pages/man5/proc.5.html). For a better idea of what each field represents, see the [vmstat man page](http://linux.die.net/man/8/vmstat). ``` /proc/vmstat kernel/system statistics. Common entries include (from http://www.linuxinsight.com/proc_vmstat.html): Number of pages that are dirty, under writeback or unstable: nr_dirty 1550 nr_writeback 0 nr_unstable 0 Number of pages allocated to page tables, mapped by files or allocated by the kernel slab allocator: nr_page_table_pages 699 nr_mapped 139596 nr_slab 42723 Number of pageins and pageouts (since the last boot): pgpgin 33754195 pgpgout 38985992 Number of swapins and swapouts (since the last boot): pswpin 2473 pswpout 2995 Number of page allocations per zone (since the last boot): pgalloc_high 0 pgalloc_normal 110123213 pgalloc_dma32 0 pgalloc_dma 415219 Number of page frees, activations and deactivations (since the last boot): pgfree 110549163 pgactivate 4509729 pgdeactivate 2136215 Number of minor and major page faults (since the last boot): pgfault 80663722 pgmajfault 49813 Number of page refills (per zone, since the last boot): pgrefill_high 0 pgrefill_normal 5817500 pgrefill_dma32 0 pgrefill_dma 149176 Number of page steals (per zone, since the last boot): pgsteal_high 0 pgsteal_normal 10421346 pgsteal_dma32 0 pgsteal_dma 142196 Number of pages scanned by the kswapd daemon (per zone, since the last boot): pgscan_kswapd_high 0 pgscan_kswapd_normal 10491424 pgscan_kswapd_dma32 0 pgscan_kswapd_dma 156130 Number of pages reclaimed directly (per zone, since the last boot): pgscan_direct_high 0 pgscan_direct_normal 11904 pgscan_direct_dma32 0 pgscan_direct_dma 225 Number of pages reclaimed via inode freeing (since the last boot): pginodesteal 11 Number of slab objects scanned (since the last boot): slabs_scanned 8926976 Number of pages reclaimed by kswapd (since the last boot): kswapd_steal 10551674 Number of pages reclaimed by kswapd via inode freeing (since the last boot): kswapd_inodesteal 338730 Number of kswapd's calls to page reclaim (since the last boot): pageoutrun 181908 Number of direct reclaim calls (since the last boot): allocstall 160 Miscellaneous statistics: pgrotated 3781 nr_bounce 0 ``` ### Configuration: ```toml # Get kernel statistics from /proc/vmstat [[inputs.kernel_vmstat]] # no configuration ``` ### Measurements & Fields: - kernel_vmstat - nr_free_pages (integer, `nr_free_pages`) - nr_inactive_anon (integer, `nr_inactive_anon`) - nr_active_anon (integer, `nr_active_anon`) - nr_inactive_file (integer, `nr_inactive_file`) - nr_active_file (integer, `nr_active_file`) - nr_unevictable (integer, `nr_unevictable`) - nr_mlock (integer, `nr_mlock`) - nr_anon_pages (integer, `nr_anon_pages`) - nr_mapped (integer, `nr_mapped`) - nr_file_pages (integer, `nr_file_pages`) - nr_dirty (integer, `nr_dirty`) - nr_writeback (integer, `nr_writeback`) - nr_slab_reclaimable (integer, `nr_slab_reclaimable`) - nr_slab_unreclaimable (integer, `nr_slab_unreclaimable`) - nr_page_table_pages (integer, `nr_page_table_pages`) - nr_kernel_stack (integer, `nr_kernel_stack`) - nr_unstable (integer, `nr_unstable`) - nr_bounce (integer, `nr_bounce`) - nr_vmscan_write (integer, `nr_vmscan_write`) - nr_writeback_temp (integer, `nr_writeback_temp`) - nr_isolated_anon (integer, `nr_isolated_anon`) - nr_isolated_file (integer, `nr_isolated_file`) - nr_shmem (integer, `nr_shmem`) - numa_hit (integer, `numa_hit`) - numa_miss (integer, `numa_miss`) - numa_foreign (integer, `numa_foreign`) - numa_interleave (integer, `numa_interleave`) - numa_local (integer, `numa_local`) - numa_other (integer, `numa_other`) - nr_anon_transparent_hugepages (integer, `nr_anon_transparent_hugepages`) - pgpgin (integer, `pgpgin`) - pgpgout (integer, `pgpgout`) - pswpin (integer, `pswpin`) - pswpout (integer, `pswpout`) - pgalloc_dma (integer, `pgalloc_dma`) - pgalloc_dma32 (integer, `pgalloc_dma32`) - pgalloc_normal (integer, `pgalloc_normal`) - pgalloc_movable (integer, `pgalloc_movable`) - pgfree (integer, `pgfree`) - pgactivate (integer, `pgactivate`) - pgdeactivate (integer, `pgdeactivate`) - pgfault (integer, `pgfault`) - pgmajfault (integer, `pgmajfault`) - pgrefill_dma (integer, `pgrefill_dma`) - pgrefill_dma32 (integer, `pgrefill_dma32`) - pgrefill_normal (integer, `pgrefill_normal`) - pgrefill_movable (integer, `pgrefill_movable`) - pgsteal_dma (integer, `pgsteal_dma`) - pgsteal_dma32 (integer, `pgsteal_dma32`) - pgsteal_normal (integer, `pgsteal_normal`) - pgsteal_movable (integer, `pgsteal_movable`) - pgscan_kswapd_dma (integer, `pgscan_kswapd_dma`) - pgscan_kswapd_dma32 (integer, `pgscan_kswapd_dma32`) - pgscan_kswapd_normal (integer, `pgscan_kswapd_normal`) - pgscan_kswapd_movable (integer, `pgscan_kswapd_movable`) - pgscan_direct_dma (integer, `pgscan_direct_dma`) - pgscan_direct_dma32 (integer, `pgscan_direct_dma32`) - pgscan_direct_normal (integer, `pgscan_direct_normal`) - pgscan_direct_movable (integer, `pgscan_direct_movable`) - zone_reclaim_failed (integer, `zone_reclaim_failed`) - pginodesteal (integer, `pginodesteal`) - slabs_scanned (integer, `slabs_scanned`) - kswapd_steal (integer, `kswapd_steal`) - kswapd_inodesteal (integer, `kswapd_inodesteal`) - kswapd_low_wmark_hit_quickly (integer, `kswapd_low_wmark_hit_quickly`) - kswapd_high_wmark_hit_quickly (integer, `kswapd_high_wmark_hit_quickly`) - kswapd_skip_congestion_wait (integer, `kswapd_skip_congestion_wait`) - pageoutrun (integer, `pageoutrun`) - allocstall (integer, `allocstall`) - pgrotated (integer, `pgrotated`) - compact_blocks_moved (integer, `compact_blocks_moved`) - compact_pages_moved (integer, `compact_pages_moved`) - compact_pagemigrate_failed (integer, `compact_pagemigrate_failed`) - compact_stall (integer, `compact_stall`) - compact_fail (integer, `compact_fail`) - compact_success (integer, `compact_success`) - htlb_buddy_alloc_success (integer, `htlb_buddy_alloc_success`) - htlb_buddy_alloc_fail (integer, `htlb_buddy_alloc_fail`) - unevictable_pgs_culled (integer, `unevictable_pgs_culled`) - unevictable_pgs_scanned (integer, `unevictable_pgs_scanned`) - unevictable_pgs_rescued (integer, `unevictable_pgs_rescued`) - unevictable_pgs_mlocked (integer, `unevictable_pgs_mlocked`) - unevictable_pgs_munlocked (integer, `unevictable_pgs_munlocked`) - unevictable_pgs_cleared (integer, `unevictable_pgs_cleared`) - unevictable_pgs_stranded (integer, `unevictable_pgs_stranded`) - unevictable_pgs_mlockfreed (integer, `unevictable_pgs_mlockfreed`) - thp_fault_alloc (integer, `thp_fault_alloc`) - thp_fault_fallback (integer, `thp_fault_fallback`) - thp_collapse_alloc (integer, `thp_collapse_alloc`) - thp_collapse_alloc_failed (integer, `thp_collapse_alloc_failed`) - thp_split (integer, `thp_split`) ### Tags: None ### Example Output: ``` $ telegraf --config ~/ws/telegraf.conf --input-filter kernel_vmstat --test * Plugin: kernel_vmstat, Collection 1 > kernel_vmstat allocstall=81496i,compact_blocks_moved=238196i,compact_fail=135220i,compact_pagemigrate_failed=0i,compact_pages_moved=6370588i,compact_stall=142092i,compact_success=6872i,htlb_buddy_alloc_fail=0i,htlb_buddy_alloc_success=0i,kswapd_high_wmark_hit_quickly=25439i,kswapd_inodesteal=29770874i,kswapd_low_wmark_hit_quickly=8756i,kswapd_skip_congestion_wait=0i,kswapd_steal=291534428i,nr_active_anon=2515657i,nr_active_file=2244914i,nr_anon_pages=1358675i,nr_anon_transparent_hugepages=2034i,nr_bounce=0i,nr_dirty=5690i,nr_file_pages=5153546i,nr_free_pages=78730i,nr_inactive_anon=426259i,nr_inactive_file=2366791i,nr_isolated_anon=0i,nr_isolated_file=0i,nr_kernel_stack=579i,nr_mapped=558821i,nr_mlock=0i,nr_page_table_pages=11115i,nr_shmem=541689i,nr_slab_reclaimable=459806i,nr_slab_unreclaimable=47859i,nr_unevictable=0i,nr_unstable=0i,nr_vmscan_write=6206i,nr_writeback=0i,nr_writeback_temp=0i,numa_foreign=0i,numa_hit=5113399878i,numa_interleave=35793i,numa_local=5113399878i,numa_miss=0i,numa_other=0i,pageoutrun=505006i,pgactivate=375664931i,pgalloc_dma=0i,pgalloc_dma32=122480220i,pgalloc_movable=0i,pgalloc_normal=5233176719i,pgdeactivate=122735906i,pgfault=8699921410i,pgfree=5359765021i,pginodesteal=9188431i,pgmajfault=122210i,pgpgin=219717626i,pgpgout=3495885510i,pgrefill_dma=0i,pgrefill_dma32=1180010i,pgrefill_movable=0i,pgrefill_normal=119866676i,pgrotated=60620i,pgscan_direct_dma=0i,pgscan_direct_dma32=12256i,pgscan_direct_movable=0i,pgscan_direct_normal=31501600i,pgscan_kswapd_dma=0i,pgscan_kswapd_dma32=4480608i,pgscan_kswapd_movable=0i,pgscan_kswapd_normal=287857984i,pgsteal_dma=0i,pgsteal_dma32=4466436i,pgsteal_movable=0i,pgsteal_normal=318463755i,pswpin=2092i,pswpout=6206i,slabs_scanned=93775616i,thp_collapse_alloc=24857i,thp_collapse_alloc_failed=102214i,thp_fault_alloc=346219i,thp_fault_fallback=895453i,thp_split=9817i,unevictable_pgs_cleared=0i,unevictable_pgs_culled=1531i,unevictable_pgs_mlocked=6988i,unevictable_pgs_mlockfreed=0i,unevictable_pgs_munlocked=6988i,unevictable_pgs_rescued=5426i,unevictable_pgs_scanned=0i,unevictable_pgs_stranded=0i,zone_reclaim_failed=0i 1459455200071462843 ```