| Infodoc ID |
|
Synopsis |
|
Date |
| 11923 |
|
How can one tell how much memory is being used by a process |
|
27 Jan 1998 |
How you can tell how much memory is being used by a process (context
is both 4.x and 5.x systems).
It depends on the OS and what you mean by memory:
4.x: ps aux
SZ is size of virtual data+stack in KB (note: text not included)
RSS is an approximate measure of the amount of physical memory used in
kilobytes.
<= 5.3: /usr/ucb/ps aux
SZ is size of virtual address space in pages
RSS is an approximate measure of the amount of physical memory used in
pages.
>= 5.4: /usr/ucb/ps aux
SZ is size of virtual address space in KB
RSS is an approximate measure of the amount of physical memory used in
kilobytes.
>=5.5: pmap (see proc(1) man page)
See example output below:
$ /usr/proc/bin/pmap 1701
1701: /bin/ksh
00010000 184K read/exec /usr/bin/ksh
0004C000 8K read/write/exec /usr/bin/ksh
0004E000 40K read/write/exec [ heap ]
EF600000 592K read/exec /usr/lib/libc.so.1
EF6A2000 24K read/write/exec /usr/lib/libc.so.1
EF6A8000 8K read/write/exec [ anon ]
EF6C0000 16K read/exec /usr/platform/sun4u/lib/libc_psr.so.1
EF6D0000 16K read/exec /usr/lib/libmp.so.2
EF6E2000 8K read/write/exec /usr/lib/libmp.so.2
EF700000 448K read/exec /usr/lib/libnsl.so.1
EF77E000 32K read/write/exec /usr/lib/libnsl.so.1
EF786000 24K read/write/exec [ anon ]
EF790000 32K read/exec /usr/lib/libsocket.so.1
EF7A6000 8K read/write/exec /usr/lib/libsocket.so.1
EF7A8000 8K read/write/exec [ anon ]
EF7B0000 8K read/exec/shared /usr/lib/libdl.so.1
EF7C0000 112K read/exec /usr/lib/ld.so.1
EF7EA000 16K read/write/exec /usr/lib/ld.so.1
EFFFC000 16K read/write/exec [ stack ]
total 1600K
The first column is the address of the segment, the second is the size,
the third is the permissions and the fourth tells where the segment
comes from (library, binary, etc.).
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