telegraf/plugins/inputs/system/KERNEL_VMSTAT_README.md

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2016-04-06 18:35:33 +00:00
# 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).
2016-04-06 18:35:33 +00:00
```
/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
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* 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
```