227 lines
9.4 KiB
Markdown
227 lines
9.4 KiB
Markdown
# Kernel VMStat Input Plugin
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This plugin is only available on Linux.
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The kernel_vmstat plugin gathers info about the kernel that doesn't fit into other
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plugins. In general, it is the statistics available in `/proc/vmstat` that are
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not covered by other plugins.
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The metrics are documented in `man proc` under the `/proc/vmstat` section.
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```
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/proc/vmstat
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kernel/system statistics. Common entries include (from http://www.linuxinsight.com/proc_vmstat.html):
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Number of pages that are dirty, under writeback or unstable:
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nr_dirty 1550
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nr_writeback 0
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nr_unstable 0
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Number of pages allocated to page tables, mapped by files or allocated by the kernel slab allocator:
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nr_page_table_pages 699
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nr_mapped 139596
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nr_slab 42723
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Number of pageins and pageouts (since the last boot):
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pgpgin 33754195
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pgpgout 38985992
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Number of swapins and swapouts (since the last boot):
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pswpin 2473
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pswpout 2995
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Number of page allocations per zone (since the last boot):
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pgalloc_high 0
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pgalloc_normal 110123213
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pgalloc_dma32 0
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pgalloc_dma 415219
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Number of page frees, activations and deactivations (since the last boot):
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pgfree 110549163
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pgactivate 4509729
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pgdeactivate 2136215
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Number of minor and major page faults (since the last boot):
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pgfault 80663722
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pgmajfault 49813
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Number of page refills (per zone, since the last boot):
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pgrefill_high 0
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pgrefill_normal 5817500
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pgrefill_dma32 0
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pgrefill_dma 149176
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Number of page steals (per zone, since the last boot):
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pgsteal_high 0
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pgsteal_normal 10421346
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pgsteal_dma32 0
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pgsteal_dma 142196
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Number of pages scanned by the kswapd daemon (per zone, since the last boot):
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pgscan_kswapd_high 0
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pgscan_kswapd_normal 10491424
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pgscan_kswapd_dma32 0
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pgscan_kswapd_dma 156130
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Number of pages reclaimed directly (per zone, since the last boot):
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pgscan_direct_high 0
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pgscan_direct_normal 11904
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pgscan_direct_dma32 0
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pgscan_direct_dma 225
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Number of pages reclaimed via inode freeing (since the last boot):
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pginodesteal 11
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Number of slab objects scanned (since the last boot):
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slabs_scanned 8926976
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Number of pages reclaimed by kswapd (since the last boot):
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kswapd_steal 10551674
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Number of pages reclaimed by kswapd via inode freeing (since the last boot):
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kswapd_inodesteal 338730
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Number of kswapd's calls to page reclaim (since the last boot):
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pageoutrun 181908
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Number of direct reclaim calls (since the last boot):
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allocstall 160
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Miscellaneous statistics:
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pgrotated 3781
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nr_bounce 0
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```
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### Configuration:
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```toml
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# Get kernel statistics from /proc/vmstat
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[[inputs.kernel_vmstat]]
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# no configuration
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```
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### Measurements & Fields:
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- kernel_vmstat
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- nr_free_pages (integer, `nr_free_pages`)
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- nr_inactive_anon (integer, `nr_inactive_anon`)
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- nr_active_anon (integer, `nr_active_anon`)
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- nr_inactive_file (integer, `nr_inactive_file`)
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- nr_active_file (integer, `nr_active_file`)
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- nr_unevictable (integer, `nr_unevictable`)
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- nr_mlock (integer, `nr_mlock`)
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- nr_anon_pages (integer, `nr_anon_pages`)
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- nr_mapped (integer, `nr_mapped`)
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- nr_file_pages (integer, `nr_file_pages`)
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- nr_dirty (integer, `nr_dirty`)
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- nr_writeback (integer, `nr_writeback`)
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- nr_slab_reclaimable (integer, `nr_slab_reclaimable`)
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- nr_slab_unreclaimable (integer, `nr_slab_unreclaimable`)
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- nr_page_table_pages (integer, `nr_page_table_pages`)
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- nr_kernel_stack (integer, `nr_kernel_stack`)
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- nr_unstable (integer, `nr_unstable`)
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- nr_bounce (integer, `nr_bounce`)
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- nr_vmscan_write (integer, `nr_vmscan_write`)
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- nr_writeback_temp (integer, `nr_writeback_temp`)
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- nr_isolated_anon (integer, `nr_isolated_anon`)
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- nr_isolated_file (integer, `nr_isolated_file`)
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- nr_shmem (integer, `nr_shmem`)
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- numa_hit (integer, `numa_hit`)
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- numa_miss (integer, `numa_miss`)
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- numa_foreign (integer, `numa_foreign`)
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- numa_interleave (integer, `numa_interleave`)
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- numa_local (integer, `numa_local`)
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- numa_other (integer, `numa_other`)
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- nr_anon_transparent_hugepages (integer, `nr_anon_transparent_hugepages`)
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- pgpgin (integer, `pgpgin`)
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- pgpgout (integer, `pgpgout`)
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- pswpin (integer, `pswpin`)
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- pswpout (integer, `pswpout`)
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- pgalloc_dma (integer, `pgalloc_dma`)
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- pgalloc_dma32 (integer, `pgalloc_dma32`)
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- pgalloc_normal (integer, `pgalloc_normal`)
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- pgalloc_movable (integer, `pgalloc_movable`)
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- pgfree (integer, `pgfree`)
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- pgactivate (integer, `pgactivate`)
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- pgdeactivate (integer, `pgdeactivate`)
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- pgfault (integer, `pgfault`)
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- pgmajfault (integer, `pgmajfault`)
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- pgrefill_dma (integer, `pgrefill_dma`)
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- pgrefill_dma32 (integer, `pgrefill_dma32`)
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- pgrefill_normal (integer, `pgrefill_normal`)
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- pgrefill_movable (integer, `pgrefill_movable`)
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- pgsteal_dma (integer, `pgsteal_dma`)
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- pgsteal_dma32 (integer, `pgsteal_dma32`)
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- pgsteal_normal (integer, `pgsteal_normal`)
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- pgsteal_movable (integer, `pgsteal_movable`)
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- pgscan_kswapd_dma (integer, `pgscan_kswapd_dma`)
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- pgscan_kswapd_dma32 (integer, `pgscan_kswapd_dma32`)
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- pgscan_kswapd_normal (integer, `pgscan_kswapd_normal`)
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- pgscan_kswapd_movable (integer, `pgscan_kswapd_movable`)
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- pgscan_direct_dma (integer, `pgscan_direct_dma`)
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- pgscan_direct_dma32 (integer, `pgscan_direct_dma32`)
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- pgscan_direct_normal (integer, `pgscan_direct_normal`)
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- pgscan_direct_movable (integer, `pgscan_direct_movable`)
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- zone_reclaim_failed (integer, `zone_reclaim_failed`)
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- pginodesteal (integer, `pginodesteal`)
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- slabs_scanned (integer, `slabs_scanned`)
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- kswapd_steal (integer, `kswapd_steal`)
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- kswapd_inodesteal (integer, `kswapd_inodesteal`)
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- kswapd_low_wmark_hit_quickly (integer, `kswapd_low_wmark_hit_quickly`)
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- kswapd_high_wmark_hit_quickly (integer, `kswapd_high_wmark_hit_quickly`)
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- kswapd_skip_congestion_wait (integer, `kswapd_skip_congestion_wait`)
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- pageoutrun (integer, `pageoutrun`)
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- allocstall (integer, `allocstall`)
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- pgrotated (integer, `pgrotated`)
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- compact_blocks_moved (integer, `compact_blocks_moved`)
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- compact_pages_moved (integer, `compact_pages_moved`)
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- compact_pagemigrate_failed (integer, `compact_pagemigrate_failed`)
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- compact_stall (integer, `compact_stall`)
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- compact_fail (integer, `compact_fail`)
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- compact_success (integer, `compact_success`)
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- htlb_buddy_alloc_success (integer, `htlb_buddy_alloc_success`)
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- htlb_buddy_alloc_fail (integer, `htlb_buddy_alloc_fail`)
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- unevictable_pgs_culled (integer, `unevictable_pgs_culled`)
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- unevictable_pgs_scanned (integer, `unevictable_pgs_scanned`)
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- unevictable_pgs_rescued (integer, `unevictable_pgs_rescued`)
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- unevictable_pgs_mlocked (integer, `unevictable_pgs_mlocked`)
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- unevictable_pgs_munlocked (integer, `unevictable_pgs_munlocked`)
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- unevictable_pgs_cleared (integer, `unevictable_pgs_cleared`)
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- unevictable_pgs_stranded (integer, `unevictable_pgs_stranded`)
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- unevictable_pgs_mlockfreed (integer, `unevictable_pgs_mlockfreed`)
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- thp_fault_alloc (integer, `thp_fault_alloc`)
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- thp_fault_fallback (integer, `thp_fault_fallback`)
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- thp_collapse_alloc (integer, `thp_collapse_alloc`)
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- thp_collapse_alloc_failed (integer, `thp_collapse_alloc_failed`)
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- thp_split (integer, `thp_split`)
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### Tags:
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None
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### Example Output:
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```
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$ telegraf -config ~/ws/telegraf.conf -input-filter kernel_vmstat -test
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* Plugin: kernel_vmstat, Collection 1
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> 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
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```
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