telegraf/plugins/inputs/system/KERNEL_VMSTAT_README.md

Kernel VMStat Input Plugin

This plugin is only available on Linux.

The kernel_vmstat plugin gathers info about the kernel that doesn't fit into other plugins. In general, it is the statistics available in /proc/vmstat that are not covered by other plugins.

The metrics are documented in man proc under the /proc/vmstat section.

/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:

# 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