linux内存和缓冲区,linux – 内存消失了(不,不是缓冲区或缓存)
任何人都可以告訴我內存消失的地方：
(不,這次既不緩沖也不緩存)
# free
total used free shared buffers cached
Mem: 3928200 3868560 59640 0 2888 92924
-/+ buffers/cache: 3772748 155452
Swap: 4192956 226352 3966604
頂部,按內存排序,降序：
top - 13:42:06 up 1 day,3:47,2 users,load average: 0.08,0.12,0.36
Tasks: 228 total,1 running,227 sleeping,0 stopped,0 zombie
cpu0 : 2.0%us,4.0%sy,0.0%ni,90.1%id,0.0%wa,0.0%hi,4.0%si,0.0%st
cpu1 : 0.0%us,0.0%sy,0.0%id,100.0%wa,0.0%si,0.0%st
Mem: 3928200k total,3868020k used,60180k free,2896k buffers
Swap: 4192956k total,226048k used,3966908k free,82068k cached
PID USER PR NI VIRT RES SHR S %cpu %MEM TIME+ COMMAND
3863 root 20 0 902m 199m 3296 S 7 5.2 99:08.77 ndsd
21906 root 20 0 138m 9076 2988 S 0 0.2 0:00.02 sfcbd
2332 root 20 0 126m 4660 1332 S 0 0.1 0:17.72 mono
4243 wwwrun 20 0 683m 4468 668 S 0 0.1 0:07.38 java
2994 root 20 0 202m 2288 1660 S 0 0.1 6:10.02 httpstkd
4338 root 20 0 184m 2240 1112 S 0 0.1 0:00.52 namcd
21898 root 20 0 32368 1832 1256 R 1 0.0 0:00.08 top
事實上,前段時間,oom開始闖入并崩潰了系統(內核恐慌),我擔心我們離這一點不遠了……
UPDATE
# cat /proc/meminfo
MemTotal: 3928200 kB
MemFree: 51336 kB
Buffers: 2964 kB
Cached: 72876 kB
SwapCached: 29128 kB
Active: 233440 kB
Inactive: 88040 kB
Active(anon): 188920 kB
Inactive(anon): 56752 kB
Active(file): 44520 kB
Inactive(file): 31288 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 4192956 kB
SwapFree: 3966824 kB
Dirty: 32 kB
Writeback: 0 kB
AnonPages: 225112 kB
Mapped: 11356 kB
Shmem: 32 kB
Slab: 1624080 kB
SReclaimable: 13740 kB
SUnreclaim: 1610340 kB
KernelStack: 4176 kB
PageTables: 10500 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 6157056 kB
Committed_AS: 2397684 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 441372 kB
VmallocChunk: 34359246755 kB
HardwareCorrupted: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 10240 kB
DirectMap2M: 4184064 kB
slabtop
Active / Total Objects (% used) : 9041019 / 9207548 (98.2%)
Active / Total Slabs (% used) : 401132 / 401156 (100.0%)
Active / Total Caches (% used) : 91 / 159 (57.2%)
Active / Total Size (% used) : 1491537.88K / 1519791.56K (98.1%)
Minimum / Average / Maximum Object : 0.02K / 0.17K / 4096.00K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
4240470 4240319 99% 0.12K 141349 30 565396K pid
2245140 2219675 98% 0.25K 149676 15 598704K size-256
2238090 2210087 98% 0.12K 74603 30 298412K size-128
...
總結
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