memory usage

icegood · 01-27-2010, 11:57 AM

I have under debian

Code:

cat /proc/meminfo

Code:

MemTotal:         250748 kB
MemFree:           36356 kB
Buffers:           64184 kB
Cached:            99328 kB
SwapCached:        16696 kB
Active:            83604 kB
Inactive:         101392 kB
Active(anon):       4780 kB
Inactive(anon):    18700 kB
Active(file):      78824 kB
Inactive(file):    82692 kB
Unevictable:        3020 kB
Mlocked:            3020 kB
HighTotal:             0 kB
HighFree:              0 kB
LowTotal:         250748 kB
LowFree:           36356 kB
SwapTotal:        746980 kB
SwapFree:         727688 kB
Dirty:                20 kB
Writeback:             0 kB
AnonPages:          8224 kB
Mapped:             5308 kB
Slab:              19464 kB
SReclaimable:      12012 kB
SUnreclaim:         7452 kB
PageTables:          704 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:      872352 kB
Committed_AS:      82812 kB
VmallocTotal:     770104 kB
VmallocUsed:        2060 kB
VmallocChunk:     760940 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       4096 kB
DirectMap4k:       16320 kB
DirectMap4M:      245760 kB

but

Code:

ps aux | sort -k 4

(sorting by %MEM field)
returns most memory usable

Code:

root     11149  0.0  1.0   8156  2756 ?        Ss   15:59   0:00 sshd: root@notty

In all cases sum of percents not more than 15%. And it's not rather than usage at all (physycal + swap)
((250748-36356)+ (746980-727688) )/ (250748+746980)*100=23.42%

What's wrong in calculations?

sundialsvcs · 01-27-2010, 12:56 PM

It is entirely possible that not all of the available memory is in use at one time. Furthermore, much of the memory that is used is occupied by shared resources ... for instance, the glibc library that is used by just about everyone at once.

"All is well. Do not be alarmed."