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电梯直达

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发表于 2011-08-24 11:40 |只看该作者 |倒序浏览

大家帮我看看
100天前
free
         total    used    free    shared buffers    cached
Mem:    3842688 3815064    27624       0    131436 2293616
-/+ buffers/cache: 1390012 2452676
Swap:          0       0       0

用户空间
使用ps -aux然后统计RSS列，加起来为380M

内核空间如下：
cat /proc/meminfo
MemTotal:    3842688 kB
MemFree:       27020 kB
Buffers:       131436 kB
Cached:       2293616 kB
SwapCached:       0 kB
Active:       2405344 kB
Inactive:    234964 kB
HighTotal:          0 kB
HighFree:          0 kB
LowTotal:    3842688 kB
LowFree:       27020 kB
SwapTotal:          0 kB
SwapFree:          0 kB
Dirty:          7292 kB
Writeback:          0 kB
Mapped:       271076 kB
Slab:          724728 kBCommitted_AS: 105289192 kB
PageTables:    5524 kB
VmallocTotal: 536870911 kB
VmallocUsed: 205316 kBVmallocChunk: 536664271 kB
HugePages_Total:    0
HugePages_Free:    0
Hugepagesize:    2048 kB

内核使用925M

现在

            total    used    free    shared buffers    cached
Mem:    3842688 3817060    25628       0    123084 1933944
-/+ buffers/cache: 1760032 2082656
Swap:          0       0       0

可使用内存少了300M

用户空间
使用ps -aux然后统计RSS列，加起来为330M，变化不大

内核空间如下：

cat /proc/meminfo
MemTotal:    3842688 kB
MemFree:       25508 kB
Buffers:       123084 kB
Cached:       1933944 kB
SwapCached:       0 kB
Active:       1916072 kB
Inactive:    316944 kB
HighTotal:          0 kB
HighFree:          0 kB
LowTotal:    3842688 kB
LowFree:       25508 kB
SwapTotal:          0 kB
SwapFree:          0 kB
Dirty:          7684 kB
Writeback:          0 kB
Mapped:       225196 kB
Slab:       711360 kBCommitted_AS: 580156732 kB
PageTables:    5444 kB
VmallocTotal: 536870911 kB
VmallocUsed: 204772 kBVmallocChunk: 536664271 kB
HugePages_Total:    0
HugePages_Free:    0
Hugepagesize:    2048 kB

内核使用915M

那么少的内存哪儿去了？