Aqui está minha free e smem output:
danslimmon@bad-server:~$ free -m
total used free shared buffers cached
Mem: 30147 29928 218 6 4 3086
-/+ buffers/cache: 26837 3309
Swap: 0 0 0
danslimmon@bad-server:~$ smem -tw
Area Used Cache Noncache
firmware/hardware 0 0 0
kernel image 0 0 0
kernel dynamic memory 12857576 2887440 9970136
userspace memory 17661400 1272468 16388932
free memory 351592 351592 0
----------------------------------------------------------
30870568 4511500 26359068
E aqui está a cabeça da minha top saída, classificada por RSS:
top - 15:51:13 up 248 days, 14:20, 1 user, load average: 14.43, 11.00, 8.95
Tasks: 510 total, 2 running, 508 sleeping, 0 stopped, 0 zombie
%Cpu(s): 30.6 us, 3.8 sy, 0.9 ni, 63.8 id, 0.1 wa, 0.0 hi, 0.5 si, 0.2 st
KiB Mem: 30870568 total, 30469188 used, 401380 free, 4364 buffers
KiB Swap: 0 total, 0 used, 0 free. 2994052 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
41801 cassand+ 20 0 17.501g 7.845g 757184 S 428.9 26.6 181039:29 java
73105 redacte+ 20 0 8401132 6.181g 3684 S 251.1 21.0 11336:12 beam.smp
105293 nobody 20 0 3115584 2.060g 2284 S 97.2 7.0 28:38.51 statsd
1743 opscent+ 20 0 3347672 172816 1460 S 0.0 0.6 383:20.64 java
73294 redacte+ 30 10 70056 58952 988 S 0.3 0.2 13:39.12 consumer:00237
73279 redacte+ 30 10 68052 56916 1008 S 1.0 0.2 47:04.69 consumer:00226
73281 redacte+ 30 10 67552 56464 1012 S 1.7 0.2 61:14.90 consumer:00230
73304 redacte+ 30 10 65512 54404 984 S 0.7 0.2 37:46.67 consumer:00210
73305 redacte+ 30 10 64640 53576 988 S 1.7 0.2 73:32.57 consumer:00228
73278 redacte+ 30 10 64540 53504 1024 S 1.3 0.2 32:16.44 consumer:00212
73308 redacte+ 30 10 64452 53392 1056 S 0.7 0.2 34:27.21 consumer:00220
73287 redacte+ 30 10 64128 53016 1004 S 1.3 0.2 70:54.29 consumer:00218
73300 redacte+ 30 10 64024 52828 984 S 0.7 0.2 33:05.53 consumer:00207
73299 redacte+ 30 10 63744 52680 984 S 1.3 0.2 40:28.91 consumer:00209
73302 redacte+ 30 10 62840 51812 1028 S 1.3 0.2 45:07.17 consumer:00210
73288 redacte+ 30 10 62268 51240 1068 S 1.0 0.2 46:46.53 consumer:00209
73297 redacte+ 30 10 62988 50924 976 S 0.7 0.2 34:03.82 consumer:00203
73296 redacte+ 30 10 62024 50912 984 S 0.7 0.2 41:08.47 consumer:00205
73280 redacte+ 30 10 61748 50588 956 S 0.7 0.2 35:50.30 consumer:00203
73303 redacte+ 30 10 60632 49564 976 S 1.3 0.2 56:31.81 consumer:00182
73290 redacte+ 30 10 60512 49440 980 S 0.7 0.2 41:46.82 consumer:00195
73283 redacte+ 30 10 60444 49356 992 S 1.3 0.2 52:56.75 consumer:00196
73289 redacte+ 30 10 60328 49196 944 S 0.7 0.2 20:24.01 consumer:00189
73291 redacte+ 30 10 60164 49004 1000 S 1.3 0.2 62:30.71 consumer:00202
73282 redacte+ 30 10 59960 48876 980 S 0.7 0.2 34:53.59 consumer:00191
73293 redacte+ 30 10 59684 48512 972 S 0.7 0.2 33:04.45 consumer:00204
73277 redacte+ 30 10 58736 47628 1000 S 1.3 0.2 40:08.13 consumer:00183
73285 redacte+ 30 10 58552 47388 1012 S 0.7 0.2 35:10.61 consumer:00190
73292 redacte+ 30 10 57676 46476 980 S 0.3 0.2 22:59.14 consumer:00185
73306 redacte+ 30 10 55792 44716 988 S 1.0 0.1 21:42.18 consumer:00200
73301 redacte+ 30 10 55744 44696 1012 S 0.0 0.1 11:05.04 consumer:00194
73298 redacte+ 30 10 55128 43972 988 S 0.3 0.1 38:29.62 consumer:00187
73286 redacte+ 30 10 55024 43904 980 S 1.0 0.1 31:53.58 consumer:00170
73295 redacte+ 30 10 53276 42156 1008 S 0.3 0.1 18:50.26 consumer:00172
73307 redacte+ 30 10 52960 41884 1004 S 0.7 0.1 25:10.44 consumer:00169
73284 redacte+ 30 10 52492 41464 1024 S 0.3 0.1 25:27.32 consumer:00167
98875 root 20 0 1034604 18088 1248 S 0.3 0.1 80:35.73 log-courier
25696 root 20 0 779288 12232 1144 S 0.0 0.0 1304:55 collectd
2073 root 20 0 60840 12092 1504 S 0.0 0.0 61:52.72 supervisord
1255 root 20 0 51436 9844 1032 S 0.0 0.0 16:55.76 munin-node
87724 root 0 -20 20936 8664 3508 S 0.0 0.0 0:05.79 atop
2149 nobody 20 0 45352 7424 1624 S 0.0 0.0 13:49.30 consumer_probe
16973 www-data 20 0 139148 5896 1536 S 0.0 0.0 874:07.04 nginx
16974 www-data 20 0 139104 5880 1544 S 0.7 0.0 869:08.26 nginx
16975 www-data 20 0 139148 5880 1532 R 8.6 0.0 880:08.30 nginx
16972 www-data 20 0 139152 5756 1532 S 0.0 0.0 869:41.00 nginx
1561 ds-agent 20 0 22336 5628 1004 S 0.0 0.0 87:27.22 datastax_agent_
90639 syslog 20 0 354552 4364 676 S 0.0 0.0 24:13.76 rsyslogd
9887 root 20 0 135816 4300 1296 S 0.0 0.0 0:00.01 nginx
101932 danslim+ 20 0 21332 3800 1752 S 0.0 0.0 0:00.08 bash
101802 root 20 0 105632 3568 2580 S 0.0 0.0 0:00.01 sshd
2065 snmp 20 0 45580 3540 764 S 0.0 0.0 171:34.48 snmpd
130366 cassand+ 20 0 21120 3140 1304 S 0.0 0.0 0:00.03 bash
130349 danslim+ 20 0 21224 3020 1140 S 0.0 0.0 0:00.02 bash
1087 root 20 0 10224 2884 600 S 0.0 0.0 0:08.15 dhclient
1 root 20 0 33648 2216 676 S 0.0 0.0 0:24.25 init
111772 danslim+ 20 0 24072 2080 1156 R 0.3 0.0 0:00.11 top
101931 danslim+ 20 0 105780 1756 752 S 0.3 0.0 0:00.16 sshd
79834 postfix 20 0 40468 1716 852 S 0.0 0.0 0:32.20 tlsmgr
3778 ntp 20 0 31444 1644 1044 S 0.0 0.0 14:21.01 ntpd
85449 root 20 0 59640 1568 1112 S 0.0 0.0 0:00.00 cron
85592 root 20 0 59640 1568 1112 S 0.0 0.0 0:00.00 cron
85740 root 20 0 59640 1568 1112 S 0.0 0.0 0:00.00 cron
85888 root 20 0 59640 1568 1112 S 0.0 0.0 0:00.00 cron
86041 root 20 0 59640 1568 1112 S 0.0 0.0 0:00.00 cron
87484 root 20 0 59640 1568 1112 S 0.0 0.0 0:00.00 cron
1481 root 20 0 61364 1556 876 S 0.0 0.0 1:11.70 sshd
130365 root 20 0 65988 1468 840 S 0.0 0.0 0:00.01 sudo
869 root 20 0 49724 1320 616 S 0.0 0.0 0:00.04 systemd-udevd
79827 postfix 20 0 27624 1264 772 S 0.0 0.0 0:22.47 qmgr
Como você pode ver, há um intervalo de ~ 10GB entre a soma dos valores na coluna RSS (~ 18 GB) e o valor Usado-Menos em cache de acordo com free . A memória cache é conseqüentemente super restringida. Vale a pena notar que o processo java existe no Cassandra e é muito segmentado.
Li esta resposta , que diz que o motivo mais comum para free reportar mais memória usada que top é que top não inclui memória compartilhada em sua coluna RSS. Isso faz sentido, e talvez pudesse explicar essa diferença nos relatórios. Mas fico me perguntando quais ferramentas vão me ajudar a descobrir qual processo está consumindo toda a memória e corrigir esse problema.
É definitivamente um problema, porque eu tenho outro servidor que supostamente está fazendo um trabalho praticamente idêntico, e nesse servidor há uma lacuna muito menor (~ 400MB comparado a ~ 10GB) entre a soma dos valores RSS e Usado -minus-Em cache, e a memória em cache nesse servidor é correspondentemente muito menos restrita.
Como posso descobrir o que está consumindo toda a memória?
Detalhes do sistema
uname :
danslimmon@bad-server:~$ uname -a
Linux bad-server 3.13.0-39-generic #66-Ubuntu SMP Tue Oct 28 13:30:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
meminfo :
danslimmon@bad-server:~$ cat /proc/meminfo
MemTotal: 30870568 kB
MemFree: 231428 kB
Buffers: 6048 kB
Cached: 3151268 kB
SwapCached: 0 kB
Active: 19606476 kB
Inactive: 1509568 kB
Active(anon): 17969604 kB
Inactive(anon): 576 kB
Active(file): 1636872 kB
Inactive(file): 1508992 kB
Unevictable: 8656 kB
Mlocked: 8656 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 3512 kB
Writeback: 0 kB
AnonPages: 17968288 kB
Mapped: 838648 kB
Shmem: 7116 kB
Slab: 195856 kB
SReclaimable: 113120 kB
SUnreclaim: 82736 kB
KernelStack: 9112 kB
PageTables: 55016 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 15435284 kB
Committed_AS: 17220572 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 71496 kB
VmallocChunk: 34359632104 kB
HardwareCorrupted: 0 kB
AnonHugePages: 10680320 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 59392 kB
DirectMap2M: 31528960 kB
lsmod :
danslimmon@bad-server:~$ lsmod
Module Size Used by
tcp_diag 12591 0
inet_diag 18543 1 tcp_diag
dm_crypt 23177 0
syscopyarea 12529 0
sysfillrect 12701 0
sysimgblt 12640 0
fb_sys_fops 12703 0
serio_raw 13462 0
isofs 39837 0
raid10 48128 0
raid456 86484 0
async_memcpy 12762 1 raid456
async_raid6_recov 12984 1 raid456
async_pq 13365 1 raid456
async_xor 13160 2 async_pq,raid456
async_tx 13509 5 async_pq,raid456,async_xor,async_memcpy,async_raid6_recov
xor 21411 1 async_xor
raid6_pq 97812 2 async_pq,async_raid6_recov
raid0 17842 0
multipath 13145 0
linear 12894 0
raid1 35530 0
crct10dif_pclmul 14289 0
crc32_pclmul 13113 0
ghash_clmulni_intel 13216 0
aesni_intel 55624 0
aes_x86_64 17131 1 aesni_intel
lrw 13286 1 aesni_intel
gf128mul 14951 1 lrw
glue_helper 13990 1 aesni_intel
ablk_helper 13597 1 aesni_intel
cryptd 20359 3 ghash_clmulni_intel,aesni_intel,ablk_helper
psmouse 106714 0
floppy 69418 0
ixgbevf 50771 0
slabinfo :
danslimmon@bad-server:~$ sudo cat /proc/slabinfo
slabinfo - version: 2.1
# name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> : tunables <limit> <batchcount> <sharedfactor> : slabdata <active_slabs> <num_slabs> <sharedavail>
isofs_inode_cache 0 0 632 51 8 : tunables 0 0 0 : slabdata 0 0 0
UDPLITEv6 0 0 1088 30 8 : tunables 0 0 0 : slabdata 0 0 0
UDPv6 480 480 1088 30 8 : tunables 0 0 0 : slabdata 16 16 0
tw_sock_TCPv6 1024 1024 256 64 4 : tunables 0 0 0 : slabdata 16 16 0
TCPv6 256 256 1984 16 8 : tunables 0 0 0 : slabdata 16 16 0
kcopyd_job 0 0 3312 9 8 : tunables 0 0 0 : slabdata 0 0 0
dm_uevent 0 0 2608 12 8 : tunables 0 0 0 : slabdata 0 0 0
dm_rq_target_io 0 0 424 38 4 : tunables 0 0 0 : slabdata 0 0 0
cfq_queue 0 0 232 70 4 : tunables 0 0 0 : slabdata 0 0 0
bsg_cmd 0 0 312 52 4 : tunables 0 0 0 : slabdata 0 0 0
mqueue_inode_cache 36 36 896 36 8 : tunables 0 0 0 : slabdata 1 1 0
fuse_request 0 0 408 40 4 : tunables 0 0 0 : slabdata 0 0 0
fuse_inode 0 0 768 42 8 : tunables 0 0 0 : slabdata 0 0 0
ecryptfs_key_record_cache 0 0 576 56 8 : tunables 0 0 0 : slabdata 0 0 0
ecryptfs_inode_cache 0 0 1024 32 8 : tunables 0 0 0 : slabdata 0 0 0
fat_inode_cache 0 0 712 46 8 : tunables 0 0 0 : slabdata 0 0 0
fat_cache 0 0 40 102 1 : tunables 0 0 0 : slabdata 0 0 0
hugetlbfs_inode_cache 864 864 600 54 8 : tunables 0 0 0 : slabdata 16 16 0
jbd2_journal_handle 1360 1360 48 85 1 : tunables 0 0 0 : slabdata 16 16 0
jbd2_journal_head 6480 6480 112 36 1 : tunables 0 0 0 : slabdata 180 180 0
jbd2_revoke_table_s 512 512 16 256 1 : tunables 0 0 0 : slabdata 2 2 0
jbd2_revoke_record_s 16128 16768 32 128 1 : tunables 0 0 0 : slabdata 131 131 0
ext4_inode_cache 7115 18546 984 33 8 : tunables 0 0 0 : slabdata 562 562 0
ext4_xattr 0 0 88 46 1 : tunables 0 0 0 : slabdata 0 0 0
ext4_free_data 9408 9408 64 64 1 : tunables 0 0 0 : slabdata 147 147 0
ext4_allocation_context 6780 6780 136 60 2 : tunables 0 0 0 : slabdata 113 113 0
ext4_io_end 8848 8848 72 56 1 : tunables 0 0 0 : slabdata 158 158 0
ext4_extent_status 15380 32232 40 102 1 : tunables 0 0 0 : slabdata 316 316 0
dquot 1024 1024 256 64 4 : tunables 0 0 0 : slabdata 16 16 0
pid_namespace 0 0 2192 14 8 : tunables 0 0 0 : slabdata 0 0 0
user_namespace 0 0 264 62 4 : tunables 0 0 0 : slabdata 0 0 0
posix_timers_cache 0 0 248 66 4 : tunables 0 0 0 : slabdata 0 0 0
UDP-Lite 0 0 896 36 8 : tunables 0 0 0 : slabdata 0 0 0
xfrm_dst_cache 0 0 448 36 4 : tunables 0 0 0 : slabdata 0 0 0
ip_fib_trie 146 146 56 73 1 : tunables 0 0 0 : slabdata 2 2 0
UDP 576 576 896 36 8 : tunables 0 0 0 : slabdata 16 16 0
tw_sock_TCP 32835 47680 256 64 4 : tunables 0 0 0 : slabdata 745 745 0
TCP 1134 1134 1792 18 8 : tunables 0 0 0 : slabdata 63 63 0
blkdev_queue 84 84 2264 14 8 : tunables 0 0 0 : slabdata 6 6 0
blkdev_requests 2007 2142 384 42 4 : tunables 0 0 0 : slabdata 51 51 0
blkdev_ioc 780 780 104 39 1 : tunables 0 0 0 : slabdata 20 20 0
fsnotify_event 1156 1156 120 68 2 : tunables 0 0 0 : slabdata 17 17 0
sock_inode_cache 4991 5661 640 51 8 : tunables 0 0 0 : slabdata 111 111 0
shmem_inode_cache 1392 1392 672 48 8 : tunables 0 0 0 : slabdata 29 29 0
Acpi-ParseExt 15546 15624 72 56 1 : tunables 0 0 0 : slabdata 279 279 0
Acpi-State 306 306 80 51 1 : tunables 0 0 0 : slabdata 6 6 0
Acpi-Namespace 4182 4182 40 102 1 : tunables 0 0 0 : slabdata 41 41 0
taskstats 784 784 328 49 4 : tunables 0 0 0 : slabdata 16 16 0
proc_inode_cache 8535 10250 648 50 8 : tunables 0 0 0 : slabdata 205 205 0
sigqueue 816 816 160 51 2 : tunables 0 0 0 : slabdata 16 16 0
bdev_cache 468 468 832 39 8 : tunables 0 0 0 : slabdata 12 12 0
sysfs_dir_cache 27878 28584 112 36 1 : tunables 0 0 0 : slabdata 794 794 0
mnt_cache 357 357 320 51 4 : tunables 0 0 0 : slabdata 7 7 0
inode_cache 12096 12096 584 56 8 : tunables 0 0 0 : slabdata 216 216 0
dentry 30931 45864 192 42 2 : tunables 0 0 0 : slabdata 1092 1092 0
iint_cache 0 0 72 56 1 : tunables 0 0 0 : slabdata 0 0 0
buffer_head 519830 530088 104 39 1 : tunables 0 0 0 : slabdata 13592 13592 0
mm_struct 3153 3276 896 36 8 : tunables 0 0 0 : slabdata 91 91 0
files_cache 969 969 640 51 8 : tunables 0 0 0 : slabdata 19 19 0
signal_cache 2340 2340 1088 30 8 : tunables 0 0 0 : slabdata 78 78 0
sighand_cache 1230 1230 2112 15 8 : tunables 0 0 0 : slabdata 82 82 0
task_xstate 4212 4212 832 39 8 : tunables 0 0 0 : slabdata 108 108 0
task_struct 1227 1270 6144 5 8 : tunables 0 0 0 : slabdata 254 254 0
anon_vma 9665 12544 64 64 1 : tunables 0 0 0 : slabdata 196 196 0
shared_policy_node 16716 20995 48 85 1 : tunables 0 0 0 : slabdata 247 247 0
numa_policy 170 170 24 170 1 : tunables 0 0 0 : slabdata 1 1 0
radix_tree_node 43100 64581 568 57 8 : tunables 0 0 0 : slabdata 1133 1133 0
idr_layer_cache 390 390 2112 15 8 : tunables 0 0 0 : slabdata 26 26 0
dma-kmalloc-8192 0 0 8192 4 8 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-4096 0 0 4096 8 8 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-2048 0 0 2048 16 8 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-1024 0 0 1024 32 8 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-512 0 0 512 64 8 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-256 0 0 256 64 4 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-128 0 0 128 64 2 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-64 0 0 64 64 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-32 0 0 32 128 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-16 0 0 16 256 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-8 0 0 8 512 1 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-192 0 0 192 42 2 : tunables 0 0 0 : slabdata 0 0 0
dma-kmalloc-96 0 0 96 42 1 : tunables 0 0 0 : slabdata 0 0 0
kmalloc-8192 372 372 8192 4 8 : tunables 0 0 0 : slabdata 93 93 0
kmalloc-4096 295 328 4096 8 8 : tunables 0 0 0 : slabdata 41 41 0
kmalloc-2048 553 592 2048 16 8 : tunables 0 0 0 : slabdata 37 37 0
kmalloc-1024 2445 2496 1024 32 8 : tunables 0 0 0 : slabdata 78 78 0
kmalloc-512 25536 25984 512 64 8 : tunables 0 0 0 : slabdata 406 406 0
kmalloc-256 11307 12864 256 64 4 : tunables 0 0 0 : slabdata 201 201 0
kmalloc-192 15569 20202 192 42 2 : tunables 0 0 0 : slabdata 481 481 0
kmalloc-128 15904 25216 128 64 2 : tunables 0 0 0 : slabdata 394 394 0
kmalloc-96 9618 9618 96 42 1 : tunables 0 0 0 : slabdata 229 229 0
kmalloc-64 22131 49536 64 64 1 : tunables 0 0 0 : slabdata 774 774 0
kmalloc-32 24966 29824 32 128 1 : tunables 0 0 0 : slabdata 233 233 0
kmalloc-16 54975 57344 16 256 1 : tunables 0 0 0 : slabdata 224 224 0
kmalloc-8 10752 10752 8 512 1 : tunables 0 0 0 : slabdata 21 21 0
kmem_cache_node 256 256 64 64 1 : tunables 0 0 0 : slabdata 4 4 0
kmem_cache 256 256 256 64 4 : tunables 0 0 0 : slabdata 4 4 0
slabtop :
danslimmon@bad-server:~$ sudo slabtop -o
Active / Total Objects (% used) : 939965 / 1147485 (81.9%)
Active / Total Slabs (% used) : 23919 / 23919 (100.0%)
Active / Total Caches (% used) : 63 / 96 (65.6%)
Active / Total Size (% used) : 174670.15K / 219106.31K (79.7%)
Minimum / Average / Maximum Object : 0.01K / 0.19K / 8.00K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
507702 423501 83% 0.10K 13018 39 52072K buffer_head
64581 46172 71% 0.55K 1133 57 36256K radix_tree_node
58624 58624 100% 0.02K 229 256 916K kmalloc-16
49152 22498 45% 0.06K 768 64 3072K kmalloc-64
46368 32154 69% 0.19K 1104 42 8832K dentry
44736 38006 84% 0.25K 699 64 11184K tw_sock_TCP
30090 18932 62% 0.04K 295 102 1180K ext4_extent_status
29824 22268 74% 0.03K 233 128 932K kmalloc-32
29448 28805 97% 0.11K 818 36 3272K sysfs_dir_cache
25664 25664 100% 0.50K 401 64 12832K kmalloc-512
25216 15466 61% 0.12K 394 64 3152K kmalloc-128
20995 18058 86% 0.05K 247 85 988K shared_policy_node
20160 15866 78% 0.19K 480 42 3840K kmalloc-192
20031 6286 31% 0.96K 607 33 19424K ext4_inode_cache
16768 16256 96% 0.03K 131 128 524K jbd2_revoke_record_s
15736 15736 100% 0.07K 281 56 1124K Acpi-ParseExt
12864 10179 79% 0.25K 201 64 3216K kmalloc-256
12224 11706 95% 0.06K 191 64 764K anon_vma
12096 12096 100% 0.57K 216 56 6912K inode_cache
10752 10752 100% 0.01K 21 512 84K kmalloc-8
dmesg : essência
Aqui estão free output e /proc/meminfo em um servidor com o mesmo trabalho, mas sem esse sintoma de alocação ausente:
danslimmon@good-server:~$ free -m
total used free shared buffers cached
Mem: 30148 26946 3201 2 156 9907
-/+ buffers/cache: 16882 13265
Swap: 0 0 0
danslimmon@good-server:~$ cat /proc/meminfo
MemTotal: 30871560 kB
MemFree: 3239620 kB
Buffers: 160000 kB
Cached: 10157876 kB
SwapCached: 0 kB
Active: 16048988 kB
Inactive: 4190252 kB
Active(anon): 9944028 kB
Inactive(anon): 512 kB
Active(file): 6104960 kB
Inactive(file): 4189740 kB
Unevictable: 6737636 kB
Mlocked: 6737636 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 13548 kB
Writeback: 0 kB
AnonPages: 16660296 kB
Mapped: 1840700 kB
Shmem: 2752 kB
Slab: 380296 kB
SReclaimable: 295224 kB
SUnreclaim: 85072 kB
KernelStack: 12232 kB
PageTables: 48640 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 15435780 kB
Committed_AS: 16161132 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 71464 kB
VmallocChunk: 34359649788 kB
HardwareCorrupted: 0 kB
AnonHugePages: 14536704 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 49152 kB
DirectMap2M: 31539200 kB
danslimmon@good-server:~$ smem -tw
Area Used Cache Noncache
firmware/hardware 0 0 0
kernel image 0 0 0
kernel dynamic memory 8708520 8351840 356680
userspace memory 18329120 1743636 16585484
free memory 3833920 3833920 0
----------------------------------------------------------
30871560 13929396 16942164