Captures and analyzes a snapshot of virtual memory.
Global Report
svmon -G [ -i Interval [ NumIntervals ] ] [ -z ]
User Report
svmon -U [ LogName1...LogNameN ] [ -r ] [ -n | -s ] [ -w | -f -c ] [ -t Count ] [ -u | -p | -g | -v ] [ -i Interval [ NumIntervals ] ] [ -l ] [ -j ] [ -d ] [ -z ] [ -m ] [ -q ]
Command Report
svmon -C Command1...CommandN [ -r ] [ -n | -s ] [ -w | -f | -c ] [-t Count ] [ -u | -p | -g | -v ] [ -i Interval [ NumIntervals] ] [ -l ] [ -j ] [ -d ] [ -z ] [ -m ] [ -q ]
Workload Management Class Report
svmon -W [ ClassName1...ClassNameN ] [ -e ] [ -r ] [ -n | -s ] [ -w | -f | -c ] [-t Count ] [ -u | -p | -g | -v ] [ -i Interval [ NumIntervals]] [ -l ] [ -d ] [ -z ] [ -m ] [ -q ]
Workload Management Tier Report
svmon -T [ Tier1...TierN ] [ -a SupClassName ] [ -x ] [ -e ] [ -r ] [ -u | -p | -g | -v ] [ -n | -s ] [ -w | -f | -c ] [ -t Count ] [ -i Interval [ NumIntervals ] ] [ -l ] [ -z ] [ -m ]
Process Report
svmon -P [ PID1... PIDN ] [ -r [ -n | -s ] [ -w | -f | -c ] [ -t Count ] [ -u | -p | -g | -v ] [ -i Interval [ NumIntervals] ] [ -l ] [ -j ] [ -z ] [ -m ] [ -q ]
Segment Report
svmon -S [ SID1...SIDN ] [ -r ] [ -n | -s ] [ -w | -f | -c ] [ -t Count ] [ -u | -p | -g | -v ] [ -i Interval [ NumIntervals] ] [ -l ] [ -j ] [ -z ] [ -m ] [ -q ]
Detailed Report
svmon -D SID1..SIDN [ -b ] [ -i Interval [ NumIntervals] ] [ -z ] [ -q ]
Framed Report
svmon -F [ Frame1..FrameN ] [ -i Interval [ NumIntervals] ] [ -z ] [ -q ]
The svmon command displays information about the current state of memory. The displayed information does not constitute a true snapshot of memory, because the svmon command runs at user level with interrupts enabled.
The segment is a set of pages and is the basic object used to report the memory consumption. So the statistics reported by svmon are expressed in terms of pages. A page is a 4K block of virtual memory while a frame is a 4K block of real memory. Unless otherwise noted, all statistics are in units of 4096-byte of memory pages.
On large page systems, some pages may have a different size. Yet, the reports are always expressed in 4KB unit. There are two exceptions:
PageSize Inuse Pin Pgsp Virtual 4 KB 6086 2000 1000 6080 16 MB 1 1 0 1
pgsize size free lpage pool 16 MB 4 2The metrics reported on the 16MB lines represent counts of pages of 16MB.
The memory consumption is reported using the inuse, free, pin, virtual and paging space counters.
For some reports (-P, -U, -C, -W, -T), the heading lines display the global memory consumption for the entity (It summarizes the memory consumption of the segments used by this entity). On large page systems this memory consumption is followed by the distribution between the different page sizes.
PageSize Inuse Pin Pgsp Virtual
4 KB 6086 2000 1000 6080
16 MB 1 1 0 1
The Column headings are:
The different values are expressed in the PageSize pages unit.
A segment can be used by multiple processes. Each page from such a segment is accounted for in the inuse, pin, virtual or pgspace fields for each process that uses the segment. Therefore, the total of the inuse, pin, virtual and pgspace fields over all active processes may exceed the total number of pages in memory or on paging space.
VMM manages virtual page counters for statistical purpose only, which means they are not always up-to-date and their values may be less than the corresponding inuse counters.
A segment belongs to one of the five following types:
| persistent | Segments used to manipulate files and directories |
| working | Segments used to implement the data areas of processes and shared memory segments |
| client | Segments used to implement some virtual file systems like Network File System (NFS) and the CD-ROM file system |
| mapping | Segments used to implement the mapping of files in memory |
| real memory mapping | Segments used to access the IO space from the virtual address space. |
This command is valid only on the PowerPC platform.
The svmon command creates nine types of reports:
Each report type is described here.
The global report is printed when the -G flag is specified. The column headings in a global report are:
The user report is printed when the -U flag is specified. The column headings in a user login report are:
If a large page pool is defined and the user has large page capabilities (LPageCap is "Y"), these statistics are followed by the distribution between the different page sizes.
If the -d flag is specified, these statistics are followed by the information about all the processes run by the specified login user name. This information is similar to the one described in Process Report.
Then svmon command displays information about the segments used by those processes. This set of segments is separated into three categories:
For each category, there is a report on the page consumption for the related segments. If the LPageCap is "Y" (see above), a report on the use of the different page sizes is added. Then segment specific metrics are listed.
If the -l flag is specified, each segment in the last category is followed by the list of process identifiers that use the segment. Beside the process identifier, the login user name which started it, is also displayed. See the -l flag description for special segments processing.
If the -r flag is specified, each segment is followed by the ranges, within the segment, where pages have been allocated.
If the -q flag is specified, only users with the large page capability (LPageCap) are reported. Note that all of the segments for this user are reported. If a list of users is specified, an error is reported for each user without large page capability.
The command report is printed when the -C flag is specified. The column headings in a command report are:
If a large page pool is defined, these statistics are followed by the distribution between the different page sizes.
If the -d flag is specified, these statistics are followed by the information about all the processes running the specified command. This information is similar to the one described in Process Report.
Next svmon displays information about the segments used by those processes. This set of segments is separated into three categories:
For each category, there is a report on the page consumption for the related segments. If the machine has large page capabilities, a report on the use of the different page sizes is added. Then segment specific metrics are listed.
If the -l flag is specified, each segment in the last category is followed by the list of process identifiers that use the segment. Beside the process identifier, the command name it runs is also displayed. See the -l flag description for special segments processing.
If the -r flag is specified, each segment is followed by the ranges, within the segment, where pages have been allocated.
If the -q flag is specified, only information related to large page segments are reported.
svmon provides the ability to report workload management related activity with the following 2 types of report:
These reports are available when the workload manager is running. Otherwise, the message WLM must be started displays and no statistics are reported. When the workload manager is running in passive mode, svmon displays the following message: WLM is running in passive mode before displaying the statistics.
Refer to Workload Management in AIX 5L Version 5.2 System Management Guide: Operating System and Devices.
Class Report
The class report prints when the -W flag is specified. The column headings in a class report are:
If a large page pool is defined, these statistics are followed by the distribution between the different page sizes.
After these statistics are displayed, svmon displays information about the segments belonging to the class.
If the -e flag is specified, the statistics of the subclasses of the class are displayed and the segments statistics are reported per subclass. In this case, the class parameter must be a superclass name.
If the -l flag is specified, each segment is followed by the list of process identifiers which are using it. Besides the process identifier, the workload class which the process belongs to is also displayed. See the -l flag description for special segments processing.
If the -r flag is specified, each segment is followed by the ranges, within the segment, where pages have been allocated.
If the -q flag is specified, only large page segments are reported. In that case, global metrics are only related to these large page segments.
Tier Report
The tier report prints when the -T flag is specified. The column headings in a tier report are:
If a large page pool is defined, these statistics are followed by the distribution between the different page sizes.
After these statistics are displayed, svmon displays information about the classes belonging to the tier.
If the -e flag is specified, the statistics of the subclasses of each superclass belonging to the tier, are reported.
If the -x flag is specified, svmon displays information about the segments belonging to each class.
The -r and -l flags can only be used in conjunction with -x.
If the -l flag is specified, each segment is followed by the list of process identifiers which are using it. Besides the process identifier, the tier number and class which the process belongs to are also displayed. See the -l flag description for special segments processing.
If the -r flag is specified, each segment is followed by the ranges, within the segment, where pages have been allocated.
If the -q flag is specified, only large page segments are reported. In that case, global metrics are only related to these large page segments.
The process report is printed when the -P flag is specified. The column headings in a process report are:
If a large page pool is defined, these statistics are followed by the distribution between the different page sizes.
After process information is displayed, svmon displays information about all the segments the process uses. Information about segment are described in the paragraph Segment Report
If the -q flag is specified, only processes marked as large page processes (LPage) are reported. Note that all of the segments for these processes are reported. If a list of processes is specified, an error is reported for each process not marked large page.
The segment report is printed when the -S flag is specified. The column headings in a segment report are:
If the segment is a persistent segment and is not associated with a log, then the device name and i-node number of the associated file are displayed, separated by a colon. The device name and i-node can be translated into a file name with the ncheck command or by using the -j flag. If the segment is the primary segment of a large file, then the words large file are prepended to the description.
If the segment is a persistent segment and is associated with a log, then the string log displays. If the segment is a working segment, then the svmon command attempts to determine the role of the segment. For instance, special working segments such as the kernel and shared library are recognized by the svmon command. If the segment is the private data segment for a process, then private prints out. If the segment is the code segment for a process, and the segment report prints out in response to the -P flag, then the string code is prepended to the description.
If the segment is mapped by several processes and used in a different way (for example, a process private segment mapped as shared memory by another process), then the description is empty. The exact description can be obtained through -P flag applied on each process identifier using the segment.
If a segment description is too large to fit in the description space, then the description is truncated. The truncated part can be obtained through the -S flag (without -l) on a given segment.
Segment Tables
Description Table
| Segment Type | Segment usage | Description |
|---|---|---|
| persistent | log files | log |
| persistent | files and directories | device name : inode number |
| persistent | large files | large file device name : inode number |
| mapping | files mapping | mapped to sid source sid
no longer mapped |
| working | data areas of processes and shared memory segments | dependent on the role of the segment based on the VSID and ESID |
| client | NFS and CD-ROM files | dependent on the role of the segment based on the VSID and ESID |
| rmapping | IO space mapping | dependent on the role of the segment based on the VSID and ESID |
Description Table Based on vsid for a 32-bit Kernel
| Segment Type | Description |
|---|---|
| segment table | segment table |
| kernel segment | kernel seg |
| kernel extension segment | kernel ext seg |
| software page frame segments | page frame table |
| ram disk segment | ram disk |
| user's shadow of kernel segment | kernel shadow |
| paging space disk map segment | page space disk map |
| base config segment | base config seg |
| software hat segment | software hat |
| file structures segment | misc kernel tables |
| kernel pinned heap segment | kernel pinned heap |
| address map entry segment | ame segment |
| page table area segment | page table area |
Description Table Based on vsid for a 64-bit Kernel
| Segment Type | Description |
|---|---|
| kernel segment | kernel segment |
| VMMs private segment | vmm data segment |
| segment table segments | vmm scb segment |
| page table area segment | page table area |
| paging space disk map segment | page space disk map |
| software hat segments | software hat |
| software page frame segments | page frame table |
| real memory heap segment | rmalloc heap |
| address map entry segments | ame segment |
Description Table Based on esid for 32-bit Processes on a 32-bit Kernel
| ESID value or ranges | Description |
|---|---|
| 0x0 | kernel |
| 0x1 | code |
| 0x2 | process private |
| 0x3-0xC |
|
| 0xD | shared library text |
| 0xE | shared library ovfl |
| 0xF | shared library data |
Description Table Based on esid for 64-bit Processes on a 32-bit Kernel
| ESID value or ranges | Description |
|---|---|
| 0x0 | kernel |
| 0x2 | process private |
| 0xD | shared library text |
| 0x10 - 0x6FFFFFFF | text data BSS heap |
| 0x70000000 -0 x7FFFFFFF |
|
| 0x80000000 - 0x8FFFFFFF | private load |
| 0x90000000 - 0x90010009 | shared library text |
| 0x9001000A - 0x90020013 | shared library data |
| 0x90020014 - 0x9FFFFFFE | shared library |
| 0x9FFFFFFF | USLA |
| 0xA0000000 - 0xEFFFFFFF | rsvd for system use |
| 0xF0000000 - 0xFFFFFFFF | application stack |
Description Table Based on esid for 32-bit Processes on a 64-bit Kernel
| ESID value or ranges | Description |
|---|---|
| 0x0 | kernel |
| 0x1 | code |
| 0x2 | process private |
| 0x3-0xC |
|
| 0xD | shared library text |
| 0xE |
|
| 0xF | shared library data |
| 0x9FFFFFD0-0x9FFFFFDF | 32 bit user alias |
| 0x9FFFFFF0-0x9FFFFFFF | 32bit loader alias |
Description Table Based on esid for 64-bit Processes on a 64-bit Kernel
| ESID value or ranges | Description |
|---|---|
| 0x0 | kernel |
| 0x2 | process private |
| 0x3-0xC |
|
| 0xE |
|
| 0x10-0x6FFFFFFF | text data BSS heap |
| 0x70000000-0x7FFFFFFF | default shmat/mmap |
| 0x80000000-0x8FFFFFFF | private load |
| 0x90000000-0x9FFFFFFF | shared library text |
| 0xF0000000-0xFFFFFFFF | application stack |
If the -r flag is specified, the ranges within the segment pages which have been allocated. A working segment may have two ranges because pages are allocated by starting from both ends and moving towards the middle.
If the -l flag is specified, the list of process identifiers which use that segment is displayed. See the -l flag description for special segments processing.
If the -q flag is specified, only large page segments are reported. If a list of segments is specified, an error is reported for each segment that does not have the large page flag.
The detailed report is printed when the -D flag is specified.
Several fields are presented before the listing of the used pages:
For working segments, the following additional fields are also present:
Column headings in a detailed report.
Same segment information as described in the segment report and additionally for each frame:
The frame report prints when the -F flag is specified.
When no argument is specified, the frame report returns the percentage of real memory used for 4KB pages and also for large pages.
When frame numbers are specified, the column headings in the report are:
If no command line flag is given, then the -G flag is the default.
Access Control: You must have root authority to run this command.
svmon -G
size inuse free pin virtual
memory 786432 99980 686452 61545 86822
pg space 16384 1084
work pers clnt lpage
pin 45164 0 0 16384
in use 70261 13335 0 8192
pgsize size free
lpage pool 16 MB 4 2
The memory size of the system is 786432 frames i.e. 786432*4*1024 bytes (3 GB). This size is split into the inuse frames (99980 frames) and the free frames (686452 frames).
61545 frames are pinned in memory.
The number of pages allocated in the system virtual space is 86822.
The inuse and pin values include the pages reserved for the large page pool.
The size of the paging space is 16384 pages i.e. 16384*4*1024 bytes (64 MB).
The number of paging space pages used is 1084.
The pinned frames (61545 frames) is composed of working segment pinned pages (45164 frames) and large pages pages (16384 frames i.e. 4*16*256 = the large page pool size expressed in 4KB pages).
The number of frames containing pages (99980 frames) is composed of working segment pages (70261 frames), persistent segment pages (13335 frames) and large page pages (8192 frames i.e. 2*16*256 = the large page used expressed in 4KB pages).
The sum of the pinned counters (work, pers, clnt, lpage) may be different from the memory pin counter and the sum of in use counters (work, pers, clnt, lpage) may be different from the memory inuse counter due first to the statistical purpose of these counters, and second to the fact that the size of the large page pool is included in the memory in use, and the in use lpage represents only the large pages used.
The large pages pool is composed by 4 large pages of 16 MB. 2 of them are free. The values are expressed in pgsize unit. The large page pool is equivalent to 16384 pages of 4KB.
svmon -G -i 60 30
svmon -U steve
===============================================================================
User Inuse Pin Pgsp Virtual LPageCap
steve 16309 11269 1083 16304 Y
PageSize Inuse Pin Pgsp Virtual
4 KB 8117 3077 1083 8112
16 MB 2 2 0 2
..............................................................................
SYSTEM segments Inuse Pin Pgsp Virtual
5828 3074 1083 5823
PageSize Inuse Pin Pgsp Virtual
4 KB 5828 3074 1083 5823
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
0 0 work kernel segment - 5823 3074 1083 5823
...............................................................................
EXCLUSIVE segments Inuse Pin Pgsp Virtual
8686 8195 0 8686
PageSize Inuse Pin Pgsp Virtual
4 KB 494 3 0 494
16 MB 2 2 0 2
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
4d093 70000000 work default shmat/mmap Y 8192 8192 0 8192
5ceb7 2 work process private - 494 3 0 494
44ed1 - pers /dev/hd9var:4228 - 0 0 - -
64e79 - pers /dev/hd9var:37 - 0 0 - -
...............................................................................
SHARED segments Inuse Pin Pgsp Virtual
1795 0 0 1795
PageSize Inuse Pin Pgsp Virtual
4 KB 1795 0 0 1795
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
289aa d work shared library text - 1795 0 0 1795
The user steve has 16309 pages in real memory. 11269 frames are pinned.
The number of pages reserved or used in paging space is 1083. The number of pages allocated in the virtual space is 5823.
The user steve has the the right to use large page segment. Among the pages used by the user steve, there are 2 of them that pertain to the large page pool.
The large page size is 16MB. The segments used by the processes run by the user steve are separated into three categories:svmon -U root steve -w
svmon -U -g -t 10
svmon -U steve -l
===============================================================================
User Inuse Pin Pgsp Virtual LPageCap
steve 16309 11269 1083 16244 Y
PageSize Inuse Pin Pgsp Virtual
4 KB 8117 3077 1083 8052
16 MB 2 2 0 2
...............................................................................
SYSTEM segments Inuse Pin Pgsp Virtual
5828 3074 1083 5823
PageSize Inuse Pin Pgsp Virtual
4 KB 5828 3074 1083 5823
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
0 0 work kernel segment - 5823 3074 1083 5823
...............................................................................
EXCLUSIVE segments Inuse Pin Pgsp Virtual
8686 8195 0 8686
PageSize Inuse Pin Pgsp Virtual
4 KB 494 3 0 494
16 MB 2 2 0 2
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
4d093 70000000 work default shmat/mmap Y 8192 8192 0 8192
5ceb7 2 work process private - 494 3 0 494
44ed1 - pers /dev/hd9var:4228 - 0 0 - -
64e79 - pers /dev/hd9var:37 - 0 0 - -
...............................................................................
SHARED segments Inuse Pin Pgsp Virtual
1795 0 0 1735
PageSize Inuse Pin Pgsp Virtual
4 KB 1795 0 0 1735
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
289aa d work shared library text - 1735 0 0 1735
8050 1 pers code,/dev/hd2:4204 - 58 0 - -
pid:12374 user: steve
pid:11194 user: root
pid:10870 user: root
pid:10574 user: root
pid:10000 user: root
pid:6544 user: root
1863 - pers /dev/hd2:12837 - 2 0 - -
pid:12374 user: steve
pid:11194 user: root
pid:10870 user: root
pid:10574 user: root
pid:10000 user: root
pid:6544 user: root
Since the -l flag is specified, each segment
of the SHARED segments category is followed by the list of process identifiers
and user names which are using it.svmon -U steve -d
===============================================================================
User Inuse Pin Pgsp Virtual LPageCap
steve 16309 11269 1083 16304 Y
PageSize Inuse Pin Pgsp Virtual
4 KB 8117 3077 1083 8112
16 MB 2 2 0 2
-------------------------------------------------------------------------------
Pid Command Inuse Pin Pgsp Virtual 64-bit Mthrd LPage
1032304 shm_lgpg64 16309 11269 1083 16304 Y N Y
...............................................................................
SYSTEM segments Inuse Pin Pgsp Virtual
5828 3074 1083 5823
PageSize Inuse Pin Pgsp Virtual
4 KB 5828 3074 1083 5823
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
0 0 work kernel segment - 5823 3074 1083 5823
...............................................................................
EXCLUSIVE segments Inuse Pin Pgsp Virtual
8686 8195 0 8686
PageSize Inuse Pin Pgsp Virtual
4 KB 494 3 0 494
16 MB 2 2 0 2
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
4d093 70000000 work default shmat/mmap Y 8192 8192 0 8192
5ceb7 2 work process private - 494 3 0 494
44ed1 - pers /dev/hd9var:4228 - 0 0 - -
64e79 - pers /dev/hd9var:37 - 0 0 - -
...............................................................................
SHARED segments Inuse Pin Pgsp Virtual
1795 0 0 1795
PageSize Inuse Pin Pgsp Virtual
4 KB 1795 0 0 1795
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
289aa d work shared library text - 1795 0 0 1795
Since the -d flag is specified, the global statistics are followed by the information about all the processes run by steve. (In this case, only the ksh).
svmon -U -q
svmon -C login -r
===============================================================================
Command Inuse Pin Pgsp Virtual
login 7092 3130 1083 6844
PageSize Inuse Pin Pgsp Virtual
4 KB 7092 3130 1083 6844
16 MB 0 0 0 0
...............................................................................
SYSTEM segments Inuse Pin Pgsp Virtual
5025 3127 1083 5025
PageSize Inuse Pin Pgsp Virtual
4 KB 5025 3127 1083 5025
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
0 0 work kernel segment - 5025 3127 1083 5025
Addr Range: 0..23941
...............................................................................
EXCLUSIVE segments Inuse Pin Pgsp Virtual
103 3 0 103
PageSize Inuse Pin Pgsp Virtual
4 KB 103 3 0 103
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
3ad9d 2 work process private - 54 3 0 54
Addr Range: 0..35 : 65310..65535
3cd9e f work shared library data - 49 0 0 49
Addr Range: 0..1080
...............................................................................
SHARED segments Inuse Pin Pgsp Virtual
1964 0 0 1716
PageSize Inuse Pin Pgsp Virtual
4 KB 1964 0 0 1716
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
149aa d work shared library text - 1716 0 0 1716
Addr Range: 0..2800
3eb9f - pers /dev/hd2:202789 - 194 0 - -
Addr Range: 0..947
10ba8 - pers /dev/hd2:202790 - 36 0 - -
Addr Range: 0..35
d80 1 pers code,/dev/hd2:297192 - 15 0 - -
Addr Range: 0..14
24c32 - pers /dev/hd4:8200 - 3 0 - -
Addr Range: 0..2
The commands login use 7092 pages in real memory. 3130 frames are pinned.
The number of pages reserved or used in paging space is 1083.
The number of pages allocated in the virtual space is 6844. The login commands do not use large pages.
The segments used by the processes running the command login are separated into three categories:
The global statistics for the user steve is the sum of each field (Inuse, Pin, Pgsp, Virtual) of these three categories (SYSTEM, EXCLUSIVE, SHARED).
The address range for each segment is displayed after its statistics.
svmon -C oracle xemacs cc
svmon -W System
===============================================================================
Superclass Inuse Pin Pgsp Virtual
System 2111 465 1128 2394
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
700e - work kernel pinned heap - 1235 460 1128 1638
af90 - work - 391 1 0 391
9f76 - work - 223 0 0 214
a771 - work - 67 1 0 67
80 - pers /dev/hd2:3 - 61 0 - -
cf7c - work - 47 0 0 35
f79b - work - 21 0 0 14
9052 - pers /dev/hd3:4 - 17 0 - -
37a3 - work - 15 2 0 15
7a5 - work - 15 0 0 8
9797 - work - 12 1 0 12
52aa - pers /dev/hd2:4196 - 3 0 - -
786f - pers log - 2 0 - -
ca1a - pers /dev/hd2:12817 - 1 0 - -
89b1 - pers /dev/hd4:761 - 1 0 - -
The class System uses 2111 pages in real memory. 465 frames are pinned.
The number of pages reserved or used in paging space is 1128.
The number of pages allocated in the virtual space is 2394.
Information about each segment belonging to the class System is then displayed.
This report is made on a system without any large page pool, no distribution between the different page sizes is displayed.
svmon -W default developer
svmon -W Mysupclass -e
===============================================================================
Superclass Inuse Pin Pgsp Virtual
Mysupclass 1128 14 0 596
PageSize Inuse Pin Pgsp Virtual
4 KB 1128 14 0 596
16 MB 0 0 0 0
===============================================================================
Class Inuse Pin Pgsp Virtual
Mysupclass.Default 1128 14 0 596
PageSize Inuse Pin Pgsp Virtual
4 KB 1128 14 0 596
16 MB 0 0 0 0
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
f9bf - pers /dev/hd2:6386 - 123 0 - -
6fcd - work - 81 2 0 79
d1da - work - 79 2 0 77
260 - work - 77 2 0 75
ea5d - work - 77 2 0 75
3fe7 - work - 66 2 0 64
d7da - work - 66 2 0 64
87d0 - work - 66 2 0 64
3867 - pers /dev/hd2:4205 - 57 0 - -
522a - pers /dev/hd2:4392 - 47 0 - -
1a23 - pers /dev/hd2:24764 - 42 0 - -
===============================================================================
Class Inuse Pin Pgsp Virtual
Mysupclass.Shared 0 0 0 0
PageSize Inuse Pin Pgsp Virtual
4 KB 0 0 0 0
16 MB 0 0 0 0
===============================================================================
Class Inuse Pin Pgsp Virtual
Mysupclass.subclass 0 0 0 0
PageSize Inuse Pin Pgsp Virtual
4 KB 0 0 0 0
16 MB 0 0 0 0
As -e flag is specified, the statistics of
the superclass Mysupclass are reported with the statistics
of its subclasses.svmon -T
===============================================================================
Tier Inuse Pin Pgsp Virtual
0 58740 28140 1083 46875
PageSize Inuse Pin Pgsp Virtual
4 KB 50548 19948 1083 38683
16 MB 2 2 0 2
===============================================================================
Superclass Inuse Pin Pgsp Virtual
System 52565 28095 1083 43705
Shared 3097 0 0 3097
Unclassified 3078 45 0 73
Unmanaged 0 0 0 0
Default 0 0 0 0
===============================================================================
Tier Inuse Pin Pgsp Virtual
1 1128 14 0 596
PageSize Inuse Pin Pgsp Virtual
4 KB 1128 14 0 596
16 MB 0 0 0 0
===============================================================================
Superclass Inuse Pin Pgsp Virtual
Mysupclass 1128 14 0 596
All the superclasses of all the defined tiers are reported.svmon -T 0
===============================================================================
Tier Inuse Pin Pgsp Virtual
0 58740 28140 1083 46875
PageSize Inuse Pin Pgsp Virtual
4 KB 50548 19948 1083 38683
16 MB 2 2 0 2
===============================================================================
Superclass Inuse Pin Pgsp Virtual
System 52565 28095 1083 43705
Shared 3097 0 0 3097
Unclassified 3078 45 0 73
Unmanaged 0 0 0 0
Default 0 0 0 0
svmon -T 0 -a Mysupclass
===============================================================================
Tier Superclass Inuse Pin Pgsp Virtual
0 Mysupclass 1129 14 0 596
PageSize Inuse Pin Pgsp Virtual
4 KB 1129 14 0 596
16 MB 0 0 0 0
===============================================================================
Class Inuse Pin Pgsp Virtual
Mysupclass.Default 1129 14 0 596
Mysupclass.Shared 0 0 0 0
Mysupclass.subclass 0 0 0 0
All the subclasses, belonging to the tier 0, of the superclass Mysupclass, are reported.
svmon -T 0 1 -x
svmon -T 1 -e
===============================================================================
Tier Inuse Pin Pgsp Virtual
1 1129 14 0 596
PageSize Inuse Pin Pgsp Virtual
4 KB 1129 14 0 596
16 MB 0 0 0 0
===============================================================================
Superclass Inuse Pin Pgsp Virtual
Mysupclass 1129 14 0 596
===============================================================================
Class Inuse Pin Pgsp Virtual
Mysupclass.Default 1129 14 0 596
Mysupclass.Shared 0 0 0 0
Mysupclass.subclass 0 0 0 0
Each superclass belonging to the tier 1 is reported with its subclass
statistics.svmon -T 0 -a Mysupclass -x -l
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Tier Superclass Inuse Pin Pgsp Virtual
0 Mysupclass 4152 4118 0 4152
PageSize Inuse Pin Pgsp Virtual
4 KB 56 22 0 56
16 MB 1 1 0 1
===============================================================================
Class Inuse Pin Pgsp Virtual
Mysupclass.Default 4152 4118 0 4152
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
1140 70000000 work default shmat/mmap Y 4096 4096 0 4096
pid:827620 tier:0 class:Mysupclass.Default
a9135 - work - 27 22 0 27
Unused segment
6910d 9001000a work shared library text - 16 0 0 16
Shared library text segment
99133 8fffffff work private load - 5 0 0 5
pid:827620 tier:0 class:Mysupclass.Default
7112e 80020014 work private load - 4 0 0 4
pid:827620 tier:0 class:Mysupclass.Default
7912f ffffffff work application stack - 3 0 0 3
pid:827620 tier:0 class:Mysupclass.Default
89131 11 work text data BSS heap - 1 0 0 1
pid:827620 tier:0 class:Mysupclass.Default
===============================================================================
Class Inuse Pin Pgsp Virtual
Mysupclass.Shared 0 0 0 0
===============================================================================
Class Inuse Pin Pgsp Virtual
Mysupclass.subclass 0 0 0 0
The statistics of all the subclasses, in the tier 0, of the superclass Mysupclass are reported.
Then, because a large page pool is defined on the machine, the distribution between the different page sizes is displayed.
Then, as -x is specified, the subclass statistics are followed by its segments statistics.
Finally, as -l is specified, for each segment, the list of process which uses it, is displayed.
In this list, the process identifier followed by its tier number and its class name are given.
svmon -P 278620
-------------------------------------------------------------------------------
Pid Command Inuse Pin Pgsp Virtual 64-bit Mthrd LPage
278620 shm_lgpg64 13781 11319 1083 13769 Y N Y
PageSize Inuse Pin Pgsp Virtual
4 KB 5589 3127 1083 5577
16 MB 2 2 0 2
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
1cf8e 70000000 work default shmat/mmap Y 8192 8192 0 8192
0 0 work kernel segment - 5025 3127 1083 5025
1a9ad 90000000 work shared library text - 420 0 0 420
20cf0 90020014 work shared library text - 96 0 0 96
18f8c 9001000a work shared library text - 16 0 0 16
16d0b 9fffffff pers ,/dev/hd2:309263 - 10 0 - -
30af8 9ffffffe work - 7 0 0 7
ef87 8fffffff work private load - 5 0 0 5
1af8d 80020014 work private load - 4 0 0 4
10f88 ffffffff work application stack - 3 0 0 3
16f8b 10 pers text data BSS heap - 2 0 - -
/dev/hd1:2053
14f8a 11 work text data BSS heap - 1 0 0 1
The process 278620 is running the shm_lgpg64 command. It is a 64 bits process, not a multi-threaded process and is a process using large page.
This process uses 13781 pages in real memory. 11319 frames are pinned.
The number of pages reserved or used in paging space is 1083.
The number of pages allocated in the virtual space is 13769.
Within these pages, this process uses 2 large pages of 16MB (witch are equivalent to 8192 pages of 4KB).
Information about each segment belonging to the process is then displayed.
The segment 1cf8e is a large page one.
svmon -P 6746 10078 -wf
svmon -P -t 10 -p
svmon -P -n -w -v
svmon -S 700e 8811 bed7 1cf8e
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
700e - work kernel pinned heap - 1236 460 1128 1638
8811 - work - 379 0 26 1757
bed7 - pers /dev/hd2:41146 - 0 0 - -
1cf8e - work Y 8192 8192 0 8192
Information about each segment of the list is displayed.
Esid is not provided because this field is valid only when the segment belongs to address space of the process.
The segment 700e is the kernel pinned heap.
The segment bed7 is relative to a file whose device is /dev/hd2 and whose inode number is 41146.
The segment 8811 has no special characteristics.
The Paging space and Virtual fields of the segment bed7 are not meaningful (persistent segment).
The segment 1cf8e is a large page segment, and the memory reserved for them is equivalent to 8192 pages of 4KB.
svmon -S e00e 15015 -g
svmon -S -t 5 -w -v
svmon -S -s -u -t 10
svmon -S -q
svmon -S 30138 -r
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
30138 - work page frame table - 10752 10752 0 10752
Addr Range: 0..10751 : 0..65535
svmon -S 60218 -j
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
60218 - pers large file /dev/hd9var:214 - 328 0 - -
/var/tmp/hostmibd.logsvmon -D 36cfb
Segid: 36cfb
Type: persistent
LPage: N
Address Range: 0..4
Page Frame Pin ExtSegid ExtPage
0 62861 N - -
1 70594 N - -
2 24204 N - -
3 46339 N - -
4 23868 N - -
122070 78191 N 208831 dcd6
The segment 36cfb is a persistent segment with 5 pages. None of them is pinned.
The page 122070 is physically the page dcd6 in the extended segment 208831.
svmon -D 36cfb -b
Segid: 36cfb
Type: persistent
LPage: N
Address Range: 0..5
Page Frame Pin Ref Mod ExtSegid ExtPage
0 392948 N Y N - -
1 393187 N Y N - -
2 392968 N Y N - -
3 392825 N Y N - -
4 392890 N N N - -
5 23651 N Y N - -
As the -b flag is specified, the referenced and modified bits of each frame of the segment 36cfb are displayed.
svmon -D 36cfb -z
Segid: 36cfb
Type: persistent
LPage: N
Address Range: 0..5
Page Frame Pin ExtSegid ExtPage
0 392948 N - -
1 393187 N - -
2 392968 N - -
3 392825 N - -
4 392890 N - -
5 23651 N - -
Maximum memory allocated = 916
svmon -F
Processing.. 100% percentage of memory used: 22.83% percentage of large page memory used: 50.00%
The percentage of analyzed memory is provided in order to keep the user aware of the processing.
The percentage of memory used (that means frames with the reference flag set) is 22,83%.
The percentage of large page memory used (that means pages used by a segment) is 50.00%.
svmon -F 94072 672914
Frame Segid Ref Mod Pincount State Swbits ExtSegid LPage
94072 e6fd N N 0/0 In-Use 88000004 - N
672914 784de Y Y 0/0 In-Use 88100004 250054
The frame 94072 belongs to the segment e6fd.
The frame is not referenced and not modified, it is in the In-Use state, it does not pertain to an extended segment nor to a large page segment.
The frame 672914 belongs to the extended segment 250054 that is linked to the 784de primary segment.
Related Information
The ncheck command, rmss command.
Logical Volume Storage Overview, Paging Space Overview in AIX 5L Version 5.2 System Management Concepts: Operating System and Devices.
Workload Management in AIX 5L Version 5.2 System Management Guide: Operating System and Devices.