nr_free_pages 2596184 # 系统可用的页数 对应MemFree nr_zone_inactive_anon 489528 # 未活跃的页数 对应Inactive(anon) nr_zone_active_anon 599 # 对应Active(anon) nr_zone_inactive_file 516396 # 对应 Inactive(file) nr_zone_active_file 235058 # Active(file) nr_zone_unevictable 71526 # Unevictable nr_zone_write_pending 149 # dirty+writeback+unstable pages nr_mlock 8 # Mlocked nr_bounce 0 # Bounce nr_zspages 0 # allocated in zsmalloc nr_free_cma 0 # cma numa_hit 4634064 # allocated in intended node numa_miss 0 # allocated in non intended node numa_foreign 0 # was intended here, hit elsewhere numa_interleave 2880 # interleaver preferred this zone numa_local 4634064 # allocation from local node numa_other 0 # allocation from other node nr_inactive_anon 489528 # nr_zone_inactive_anon nr_active_anon 599 # nr_zone_active_anon nr_inactive_file 516396 # nr_zone_inactive_file nr_active_file 235058 # nr_zone_active_file nr_unevictable 71526 # nr_zone_unevictable nr_slab_reclaimable 32813 # SReclaimable nr_slab_unreclaimable 26640 # SUnreclaim nr_isolated_anon 0 # Temporary isolated pages from anon lru nr_isolated_file 0 # Temporary isolated pages from file lru workingset_nodes 0 workingset_refault_anon 0 workingset_refault_file 0 workingset_activate_anon 0 workingset_activate_file 0 workingset_restore_anon 0 workingset_restore_file 0 workingset_nodereclaim 0 nr_anon_pages 470838 # AnonPages nr_mapped 196874 # Mapped nr_file_pages 842283 # 文件缓存页 nr_dirty 149 # 脏页数 nr_writeback 0 # 回写页数 nr_writeback_temp 0 # WritebackTmp 文件系统的临时回写 nr_shmem 92614 # Shmem nr_shmem_hugepages 0 # ShmemHugePages nr_shmem_pmdmapped 0 # ShmemPmdMapped nr_file_hugepages 0 # FileHugePages nr_file_pmdmapped 0 # FilePmdMapped nr_anon_transparent_hugepages 0 # AnonHugePages nr_vmscan_write 0 # LRU内存回收写入页数 nr_vmscan_immediate_reclaim 0 # 优先回收的页数 nr_dirtied 515721 # page dirtyings since bootup nr_written 346168 # page dirtyings since bootup nr_kernel_misc_reclaimable 0 # reclaimable non-slab kernel pages nr_foll_pin_acquired 0 # via: pin_user_page(), gup flag: FOLL_PIN nr_foll_pin_released 0 # pages returned via unpin_user_page() nr_kernel_stack 12992 # KernelStack，kb单位 nr_page_table_pages 6858 # PageTables nr_swapcached 0 # swap cached nr_dirty_threshold 660577 # 脏页触发系统回写的阈值 nr_dirty_background_threshold 329885 # 脏页触发后台回写的阈值 pgpgin 2541198 # 从启动到现在读入的内存页数 pgpgout 1421761 # 从启动到现在换出的内存页数 pswpin 0 # 从启动到现在读入的交换分区页数 pswpout 0 # 从启动到现在换出的交换分区页数 pgalloc_dma 512 # 从启动到现在DMA存储区分配的页数 pgalloc_dma32 513 # 从启动到现在DMA 32位的存储区分配的页数 pgalloc_normal 4756880 # 从启动到现在普通存储区分配的页数 pgalloc_movable 0 # 可移除内存区 allocstall_dma 0 allocstall_dma32 0 allocstall_normal 0 allocstall_movable 0 pgskip_dma 0 pgskip_dma32 0 pgskip_normal 0 pgskip_movable 0 pgfree 7356348 # 从启动到现在释放的页数 pgactivate 365485 # 从启动到现在激活的页数 pgdeactivate 0 # 从启动到现在去激活的页数 pglazyfree 2336 pgfault 2896643 # 从启动到现在二级页面错误数 pgmajfault 6079 # 从启动到现在一级页面错误数 pglazyfreed 0 pgrefill 0 pgreuse 429609 # 不太理解，这里解释https://lkml.kernel.org/lkml/CAHk-=wgchPHqevEZ1radW1vLHKGGSaq_SCVHKgxHmQt70OSSfg@mail.gmail.com/ pgsteal_kswapd 0 pgsteal_direct 0 pgscan_kswapd 0 pgscan_direct 0 pgscan_direct_throttle 0 pgscan_anon 0 pgscan_file 0 pgsteal_anon 0 pgsteal_file 0 zone_reclaim_failed 0 pginodesteal 0 slabs_scanned 0 kswapd_inodesteal 0 kswapd_low_wmark_hit_quickly 0 kswapd_high_wmark_hit_quickly 0 pageoutrun 0 pgrotated 2 # 从启动到现在轮换的页面数 drop_pagecache 0 drop_slab 0 oom_kill 0 numa_pte_updates 0 numa_huge_pte_updates 0 numa_hint_faults 0 numa_hint_faults_local 0 numa_pages_migrated 0 pgmigrate_success 0 pgmigrate_fail 0 thp_migration_success 0 thp_migration_fail 0 thp_migration_split 0 compact_migrate_scanned 0 compact_free_scanned 0 compact_isolated 0 compact_stall 0 compact_fail 0 compact_success 0 compact_daemon_wake 0 compact_daemon_migrate_scanned 0 compact_daemon_free_scanned 0 htlb_buddy_alloc_success 0 htlb_buddy_alloc_fail 0 unevictable_pgs_culled 538811 unevictable_pgs_scanned 423920 unevictable_pgs_rescued 424015 unevictable_pgs_mlocked 202 unevictable_pgs_munlocked 194 unevictable_pgs_cleared 0 unevictable_pgs_stranded 0 thp_fault_alloc 0 thp_fault_fallback 0 thp_fault_fallback_charge 0 thp_collapse_alloc 0 thp_collapse_alloc_failed 0 thp_file_alloc 0 thp_file_fallback 0 thp_file_fallback_charge 0 thp_file_mapped 0 thp_split_page 0 thp_split_page_failed 0 thp_deferred_split_page 0 thp_split_pmd 0 thp_split_pud 0 thp_zero_page_alloc 0 thp_zero_page_alloc_failed 0 thp_swpout 0 thp_swpout_fallback 0 balloon_inflate 0 balloon_deflate 0 balloon_migrate 0 swap_ra 0 swap_ra_hit 0 direct_map_level2_splits 113 direct_map_level3_splits 2 nr_unstable 0
可以发现vmstat里面包含了很多的内存名词和信息，这些都是平时完全不知道的，要把内存这款了解透，得慢慢接触这些代码，配置和慢慢实践。上面分析vmstat过程中，很多不知道的，就没有细究了。因为还没那个功底去细究