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| /proc/vmstat (since Linux 2.6.0) | This file displays various virtual memory statistics. Each line of this file contains a single name-value pair, delimited by white space. Some lines are present only if the kernel was configured with suitable options. (In some cases, the options required for particular files have changed across kernel versions, so they are not listed here. Details can be found by consulting the kernel source code.) The following fields may be present: |
| nr_kernel_stack (since Linux 2.6.32) | Amount of memory allocated to kernel stacks. |
| nr_shmem (since Linux 2.6.32) | Pages used by shmem and tmpfs(5). |
| nr_free_cma (since Linux 3.7) | Number of free CMA (Contiguous Memory Allocator) pages. |
| compact_stall (since Linux 2.6.35) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| compact_fail (since Linux 2.6.35) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| compact_success (since Linux 2.6.35) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| thp_fault_alloc (since Linux 2.6.39) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| thp_fault_fallback (since Linux 2.6.39) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| thp_collapse_alloc (since Linux 2.6.39) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| thp_collapse_alloc_failed (since Linux 2.6.39) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| thp_split (since Linux 2.6.39) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| thp_zero_page_alloc (since Linux 3.8) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
| thp_zero_page_alloc_failed (since Linux 3.8) | See the kernel source file Documentation/admin-guide/mm/transhuge.rst. |
NAME
/proc/vmstat - virtual memory statistics
DESCRIPTION
- /proc/vmstat (since Linux 2.6.0)
This file displays various virtual memory statistics. Each line of this file contains a single name-value pair, delimited by white space. Some lines are present only if the kernel was configured with suitable options. (In some cases, the options required for particular files have changed across kernel versions, so they are not listed here. Details can be found by consulting the kernel source code.) The following fields may be present:
- nr_free_pages (since Linux 2.6.31)
- nr_alloc_batch (since Linux 3.12)
- nr_inactive_anon (since Linux 2.6.28)
- nr_active_anon (since Linux 2.6.28)
- nr_inactive_file (since Linux 2.6.28)
- nr_active_file (since Linux 2.6.28)
- nr_unevictable (since Linux 2.6.28)
- nr_mlock (since Linux 2.6.28)
- nr_anon_pages (since Linux 2.6.18)
- nr_mapped (since Linux 2.6.0)
- nr_file_pages (since Linux 2.6.18)
- nr_dirty (since Linux 2.6.0)
- nr_writeback (since Linux 2.6.0)
- nr_slab_reclaimable (since Linux 2.6.19)
- nr_slab_unreclaimable (since Linux 2.6.19)
- nr_page_table_pages (since Linux 2.6.0)
- nr_kernel_stack (since Linux 2.6.32)
Amount of memory allocated to kernel stacks.
- nr_unstable (since Linux 2.6.0)
- nr_bounce (since Linux 2.6.12)
- nr_vmscan_write (since Linux 2.6.19)
- nr_vmscan_immediate_reclaim (since Linux 3.2)
- nr_writeback_temp (since Linux 2.6.26)
- nr_isolated_anon (since Linux 2.6.32)
- nr_isolated_file (since Linux 2.6.32)
- nr_shmem (since Linux 2.6.32)
Pages used by shmem and tmpfs(5).
- nr_dirtied (since Linux 2.6.37)
- nr_written (since Linux 2.6.37)
- nr_pages_scanned (since Linux 3.17)
- numa_hit (since Linux 2.6.18)
- numa_miss (since Linux 2.6.18)
- numa_foreign (since Linux 2.6.18)
- numa_interleave (since Linux 2.6.18)
- numa_local (since Linux 2.6.18)
- numa_other (since Linux 2.6.18)
- workingset_refault (since Linux 3.15)
- workingset_activate (since Linux 3.15)
- workingset_nodereclaim (since Linux 3.15)
- nr_anon_transparent_hugepages (since Linux 2.6.38)
- nr_free_cma (since Linux 3.7)
Number of free CMA (Contiguous Memory Allocator) pages.
- nr_dirty_threshold (since Linux 2.6.37)
- nr_dirty_background_threshold (since Linux 2.6.37)
- pgpgin (since Linux 2.6.0)
- pgpgout (since Linux 2.6.0)
- pswpin (since Linux 2.6.0)
- pswpout (since Linux 2.6.0)
- pgalloc_dma (since Linux 2.6.5)
- pgalloc_dma32 (since Linux 2.6.16)
- pgalloc_normal (since Linux 2.6.5)
- pgalloc_high (since Linux 2.6.5)
- pgalloc_movable (since Linux 2.6.23)
- pgfree (since Linux 2.6.0)
- pgactivate (since Linux 2.6.0)
- pgdeactivate (since Linux 2.6.0)
- pgfault (since Linux 2.6.0)
- pgmajfault (since Linux 2.6.0)
- pgrefill_dma (since Linux 2.6.5)
- pgrefill_dma32 (since Linux 2.6.16)
- pgrefill_normal (since Linux 2.6.5)
- pgrefill_high (since Linux 2.6.5)
- pgrefill_movable (since Linux 2.6.23)
- pgsteal_kswapd_dma (since Linux 3.4)
- pgsteal_kswapd_dma32 (since Linux 3.4)
- pgsteal_kswapd_normal (since Linux 3.4)
- pgsteal_kswapd_high (since Linux 3.4)
- pgsteal_kswapd_movable (since Linux 3.4)
- pgsteal_direct_dma
- pgsteal_direct_dma32 (since Linux 3.4)
- pgsteal_direct_normal (since Linux 3.4)
- pgsteal_direct_high (since Linux 3.4)
- pgsteal_direct_movable (since Linux 2.6.23)
- pgscan_kswapd_dma
- pgscan_kswapd_dma32 (since Linux 2.6.16)
- pgscan_kswapd_normal (since Linux 2.6.5)
- pgscan_kswapd_high
- pgscan_kswapd_movable (since Linux 2.6.23)
- pgscan_direct_dma
- pgscan_direct_dma32 (since Linux 2.6.16)
- pgscan_direct_normal
- pgscan_direct_high
- pgscan_direct_movable (since Linux 2.6.23)
- pgscan_direct_throttle (since Linux 3.6)
- zone_reclaim_failed (since linux 2.6.31)
- pginodesteal (since linux 2.6.0)
- slabs_scanned (since linux 2.6.5)
- kswapd_inodesteal (since linux 2.6.0)
- kswapd_low_wmark_hit_quickly (since Linux 2.6.33)
- kswapd_high_wmark_hit_quickly (since Linux 2.6.33)
- pageoutrun (since Linux 2.6.0)
- allocstall (since Linux 2.6.0)
- pgrotated (since Linux 2.6.0)
- drop_pagecache (since Linux 3.15)
- drop_slab (since Linux 3.15)
- numa_pte_updates (since Linux 3.8)
- numa_huge_pte_updates (since Linux 3.13)
- numa_hint_faults (since Linux 3.8)
- numa_hint_faults_local (since Linux 3.8)
- numa_pages_migrated (since Linux 3.8)
- pgmigrate_success (since Linux 3.8)
- pgmigrate_fail (since Linux 3.8)
- compact_migrate_scanned (since Linux 3.8)
- compact_free_scanned (since Linux 3.8)
- compact_isolated (since Linux 3.8)
- compact_stall (since Linux 2.6.35)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- compact_fail (since Linux 2.6.35)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- compact_success (since Linux 2.6.35)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- htlb_buddy_alloc_success (since Linux 2.6.26)
- htlb_buddy_alloc_fail (since Linux 2.6.26)
- unevictable_pgs_culled (since Linux 2.6.28)
- unevictable_pgs_scanned (since Linux 2.6.28)
- unevictable_pgs_rescued (since Linux 2.6.28)
- unevictable_pgs_mlocked (since Linux 2.6.28)
- unevictable_pgs_munlocked (since Linux 2.6.28)
- unevictable_pgs_cleared (since Linux 2.6.28)
- unevictable_pgs_stranded (since Linux 2.6.28)
- thp_fault_alloc (since Linux 2.6.39)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- thp_fault_fallback (since Linux 2.6.39)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- thp_collapse_alloc (since Linux 2.6.39)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- thp_collapse_alloc_failed (since Linux 2.6.39)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- thp_split (since Linux 2.6.39)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- thp_zero_page_alloc (since Linux 3.8)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- thp_zero_page_alloc_failed (since Linux 3.8)
See the kernel source file Documentation/admin-guide/mm/transhuge.rst.
- balloon_inflate (since Linux 3.18)
- balloon_deflate (since Linux 3.18)
- balloon_migrate (since Linux 3.18)
- nr_tlb_remote_flush (since Linux 3.12)
- nr_tlb_remote_flush_received (since Linux 3.12)
- nr_tlb_local_flush_all (since Linux 3.12)
- nr_tlb_local_flush_one (since Linux 3.12)
- vmacache_find_calls (since Linux 3.16)
- vmacache_find_hits (since Linux 3.16)
- vmacache_full_flushes (since Linux 3.19)
SEE ALSO
proc(5)