Global report

Edit online

To print the Global report, specify the -G flag. The Global report displays a system-wide detailed real memory view of the machine. This report contains various summaries, only the memory and inuse summaries are always displayed.

When the -O summary option is not used, or when it is set to -O summary=basic, the column headings used in global reports summaries are:

memory

Specifies statistics describing the use of memory, including:

size

Number of frames (size of real memory)

Tip: This does not include the free frames that have been made unusable by the memory sizing tool, the rmss command.

inuse

Number of frames containing pages

Tip: On a system where a reserved pool is defined (such as the 16 MB page pool), this value includes the frames reserved for any of these reserved pools, even if they are not used.

free

Number of frames free in all memory pools. There may be more memory available depending on the file cache (see: available)

pin

Number of frames containing pinned pages

Tip: On a system where a reserved pool is defined (such as the 16 MB page pool), this value includes the frames reserved for any of these reserved pools.

virtual

Number of pages allocated in the system virtual space

available

Amount of memory available for computational data. This metric is calculated based on the size of the file cache and the amount of free memory.

stolen

Displayed only when rmss runs on the machine. Number of frames stolen by rmss and marked unusable by the VMM

mmode

Indicates the memory mode the system is running.

Following are the current possible values for mmode.

Ded: Neither Active Memory Sharing nor Active Memory Expansion is enabled.
Shar: Only Active Memory Sharing is enabled, Expansion in not enabled.
Ded-E: Active Memory Sharing is not enabled but Expansion is enabled.
Shar-E: Both Active Memory Sharing & Active Memory Expansion are enabled.

ucomprsd

This gives a breakdown of expanded memory statistics in the uncompressed pool, including: inuse Number of uncompressed pages that are in use.

comprsd

This gives a breakdown of expanded memory statistics in the compressed pool, including: inuse Number of compressed pages in the compressed pool.

pg space

Specifies statistics describing the use of paging space.

size: Size of paging space
inuse: Number of paging space pages used
ucomprsd: This gives a breakdown of expanded memory statistics of working pages in the uncompressed pool, including: inuse Number of compressed pages in the compressed pool.
comprsd: This gives a breakdown of expanded memory statistics of working pages in the compressed pool, including: inuse Number of compressed pages in the compressed pool.

Pin

Specifies statistics on the subset of real memory containing pinned pages, including:

work: Number of frames containing working segment in use pages
pers: Number of frames containing persistent segment in use pages
clnt: Number of frames containing client segment in use pages
other: Number of frames containing all memory pages that do not use segment control blocks. Examples for these memory pages are physical to virtual page tables (PVT), physical to virtual page lists (PVLIST), and kernel special purpose (KSP) region.

in use

Specifies statistics on the subset of real memory in use, including:

work: Number of frames containing working segment in use pages
pers: Number of frames containing persistent segment in use pages
clnt: Number of frames containing client segment in use pages

ucomprsd: This gives a breakdown of expanded memory statistics of working pages in the uncompressed pool, including: inuse Number of uncompressed pages in the compressed pool.
comprsd: This gives a breakdown of expanded memory statistics of working pages in the compressed pool, including: inuse Number of compressed pages in the compressed pool.

PageSize

Displayed only if alternative page sizes (non-4KB) are available on the system and the option -O pgsz=on is set. It displays separate sets of statistics for each of the page sizes available on the system.

PageSize: Page size for the following statistics
PoolSize: Number of pages in the pool for a page size using reserved pools (such as the 16 MB page pool)
inuse: Number of pages of this size that are used
pgsp: Number of pages of this size that are allocated in the paging space
pin: Number of pinned pages of this size
virtual: Number of pages of this size that are allocated in the system virtual space
ucomprsd: Number of pages of this size that are in uncompressed form.

Domain affinity

Displays statistics per affinity domain. This is activated by the -O affinity=on option.

total: Total memory in this affinity domain.
used: Total memory used in this affinity domain.
free: Total remaining free memory in this affinity domain
lcpus: List of logical cpus in this affinity domain.

Note: The ucomprsdand comprsd metrics are available only in systems with Active Memory Expansion enabled.–O summary=ame option is needed to show these expanded memory statistics.

When the –O summary=ame option is used in a system with Active Memory Expansion enabled, the following memory information (true memory snapshot) is displayed in the global report summary at the end of the regular report.

True Memory

True memory size.

ucomprsd

Displays detailed information about the uncompressed pool, including

CurSz: Current size of the uncompressed pool.
%Cur: Percentage of true memory used by the uncompressed pool
TgtSz: Target size of the uncompressed pool needed to achieve the target memory expansion factor.
% Tgt: Percentage of true memory that will be used by the uncompressed pool when the target memory expansion factor is achieved.

comprsd

Displays detailed information about the compressed pool, including:

CurSz: Current size of the compressed pool
%Cur: Percentage of true memory used by the compressed pool.
TgtSz: Target size of the compressed pool needed to achieve the target memory expansion factor.
% Tgt: Percentage of true memory that will be used by the compressed pool when the target memory expansion factor is achieved
% Max: Percentage of true memory that will be used by the compressed pool when the compressed pool achieves maximum size.
CRatio: Compression ratio

AME

Displays the following information

txf: Target Memory Expansion Factor
cxf: Current Memory Expansion Factor
dxf: Deficit factor to reach the target expansion factor
dxm: Deficit memory to reach the target expansion

Note: The above true memory section of expanded memory statistics can be turned off using the option –O tmem=off.

When the -O summary=longreal option is set with -G, the compact report header contains the following metrics:

Size: Number of frames (size of real memory)
Tip: This includes any free frames that have been made unusable by the memory sizing tool, the rmss command.
Inuse: Number of frames containing pages
Tip: On a system where a reserved pool is defined (such as the 16 MB page pool), this value includes the frames reserved for any of these reserved pools.
Free: Number of frames free in all memory pools. There may be more memory available depending on the file cache (see: available)
Pin: Number of frames containing pinned pages
Tip: On a system where a reserved pool is defined (such as the 16 MB page pool), this value includes the frames reserved for any of these reserved pools.
Virtual: Number of pages allocated in the system virtual space
Available: Amount of memory available for computational data. This metric is calculated based on the size of the file cache and the amount of free memory.
Pgsp: Number of pages allocated in the paging space

When -G is used in conjunction with -@ the following additional column is displayed:

WPAR: WPAR name

Note:

If you specify the -@ flag without a list, the flag has no effect except when the -O summary option is used, then the WPAR name is added in the last column.
If a list is provided after the -@ flag, the svmon command report includes one section per WPAR listed. If ALL is specified, a system-wide and a global section will also be present. Any metric not available on a per WPAR basis is either replaced by the corresponding global value (in the case of -@ WparList) or by a "-" (in the case of -@ ALL).
Global values are displayed instead of a per WPAR metrics. They are flagged by the presence of a @ in the report.
Some of the metrics are only available on a per WPAR basis if the WLM is used to restrict the WPAR memory usage.

When the -O summary=longameoption is set with -G , the compact report header contains the following Active Memory Expansion metrics

Size: Expanded memory size
Inuse: Number of pages in use (expanded form).
Free: Size of freelist (expanded form).
DXMSz: Deficit memory to reach the target memory expansion
UCMInuse: Number of uncompressed pages in use.
CMInuse: Number of compressed pages in the compressed pool.
TMSz: True memory size
TMFr: True number of free page frames
CPSz: Size of Compressed pool.
CPFr: Size of Uncompressed pool.
txf: Target Memory Expansion Factor
cxf: Current Memory Expansion Factor
CR: Compression Ratio.

Examples

To display the default svmon report, with automatic unit selection, enter:
# svmon -O summary=basic,unit=auto,pgsz=on
or

# svmon -G -O unit=auto,pgsz=on
```
Unit: auto
-------------------------------------------------------------------------------
               size       inuse        free         pin     virtual  available
memory        31.0G       2.85G       28.1G       1.65G       2.65G      27.3G
pg space    512.00M       13.4M

               work        pers        clnt       other
pin         688.57M          0K          0K     924.95M
in use        2.65G          0K     124.55M

PageSize   PoolSize       inuse        pgsp         pin     virtual
s    4 KB         -       2.41G       13.4M       1.34G       2.29G
m   64 KB         -     376.81M          0K     241.81M     376.81M
L   16 MB         5          0K          0K       80.0M          0K
```
The memory size of the system is 31GB. This size is split into the in-used frames for 2.85 GB and into the free frames for 28.1 GB. 1.65 GB are pinned in memory, 2.65 GB are allocated in the system virtual space and 27.3 GB are available to be used as computational data by new processes.

The inuse and pin values include the pages reserved for the 16 MB page memory pool (80 MB).

The size of the paging space is 512 MB, where 13.4 MB are used.

The pinned frames (1.65 GB) is composed of working segment pinned pages (688.57 MB) and 924.95 MB of other pin pages (can be used by the kernel for example), not counting the memory not used but pinned by the 16 MB page pool.

The number of frames containing pages (2.85 GB) is composed of working segment pages (2.65 GB) and client segment pages (124.55 MB), not counting the memory that is only reserved but counted inuse from the 16 MB pool.

Then statistics are displayed for each page size available on the system. For instance, the 16 MB page pool is composed of 5 pages of 16 MB. None of these are used, none are in the paging space (since they are all pinned), all of these are pinned, and none are in the system's virtual space.

To also display the affinity domain information, enter:

# svmon -G -O unit=MB,pgsz=on,affinity=on

Unit: MB
-------------------------------------------------------------------------------
               size       inuse        free         pin     virtual  available
memory     31744.00     3055.36    28688.64     1838.84     2859.78   27911.33
pg space     512.00        14.7

               work        pers        clnt       other
pin          833.90           0           0      924.95
in use      2859.78           0      163.59

PageSize   PoolSize       inuse        pgsp         pin     virtual
s    4 KB         -     1628.93        14.7     1291.47     1465.34
m   64 KB         -     1346.44           0      467.38     1346.44
L   16 MB         5        48.0           0        80.0        48.0

Domain affinity        free       used      total     lcpus
              0    14131.05    1475.13   15606.18     0  1  2  3 
              1    14589.65    1538.35   16128.00     4  5  6  7

In this example taken on a dedicated LPAR partition, we added the domain affinity metrics. The 31744 MB of memory are split into 2 memory affinity domain:

The domain 0 contains 15606.18 MB of memory with 1475.13 MB used, and 14131.05 MB free.
The domain 1 contains 16128 MB of memory with 1538.35 MB used and 14589.65 MB free.

To display detailed affinity domain information, enter:

# svmon -G -O unit=MB,pgsz=on,affinity=detail

Unit: MB
-------------------------------------------------------------------------------
               size       inuse        free         pin     virtual  available
memory     31744.00     3055.70    28688.30     1838.91     2860.11   27910.99
pg space     512.00        14.7

               work        pers        clnt       other
pin          833.96           0           0      924.95
in use      2860.11           0      163.58

PageSize   PoolSize       inuse        pgsp         pin     virtual
s    4 KB         -     1629.26        14.7     1291.47     1465.68
    Domain affinity        used
                  0      129735
                  1       44909
m   64 KB         -     1346.44           0      467.44     1346.44
    Domain affinity        used
                  0       12432
                  1        8512
L   16 MB         5        48.0           0        80.0        48.0
    Domain affinity        used
                  0        4096
                  1        8192

Domain affinity        free       used      total     lcpus
              0    14131.05    1475.13   15606.18     0  1  2  3
              1    14589.65    1538.35   16128.00     4  5  6  7

In this example, we can see that the breakdown by affinity domain is also shown in the per-page size report. This option takes some time to execute.

On a shared partition, attempting to display affinity domain information, results in:

# svmon -G -O unit=MB,pgsz=on,affinity=on

Unit: MB
-------------------------------------------------------------------------------
               size       inuse        free         pin     virtual  available
memory      4096.00      811.59     3284.41      421.71      715.08    3248.66
pg space     512.00        6.23

               work        pers        clnt       other
pin          284.02           0           0      137.68
in use       715.08           0        96.5

PageSize   PoolSize       inuse        pgsp         pin     virtual
s    4 KB         -      506.78        6.23      288.77      410.27
m   64 KB         -      304.81           0      132.94      304.81

Domain affinity        free       used      total     lcpus
              *** not supported in shared pools ***

Memory affinity domains only have meaning for dedicated partitions.

To display the one line global report, enter:

# svmon -O summary=longreal

Unit: page
------------------------------------------------------------------------
                                 Memory                                
-----------------------------------------------------------------------
      Size     Inuse      Free        Pin   Virtual Available      Pgsp
    262144    187219     74925      82515    149067    101251    131072

The metrics reported here are identical to the metrics in the basic format. There is a memory size of 262144 frames with 187219 frames inuse and 74925 remaining frames. 149067 pages are allocated in the virtual memory and 101251 frames are available.

To display global memory statistics in MB units at interval, enter:

# svmon -G -O unit=MB,summary=shortreal -i 60 5

Unit: MB
-------------------------------------------------------------------------------
     Size     Inuse      Free        Pin   Virtual Available      Pgsp
  1024.00    709.69    314.31     320.89    590.74    387.95    512.00
  1024.00    711.55    312.39     320.94    592.60    386.02    512.00
  1024.00    749.10    274.89     322.89    630.15    348.53    512.00
  1024.00    728.08    295.93     324.57    609.11    369.57    512.00
  1024.00    716.79    307.21     325.66    597.50    381.16    512.00

This example shows how to monitor the whole system by taking a memory snapshot every 60 seconds for 5 minutes.

To display detailed memory expansion information (in a system with Active Memory Expansion enabled), enter:

# svmon -G -O summary=ame

Unit: page
--------------------------------------------------------------------------------------
               size       inuse        free         pin     virtual  available   mmode
memory       262144      152619       43061       73733      154779      41340   Ded-E
 ucomprsd         -       98216           -
 comprsd          -       54403           -
pg space     131072        1212

               work        pers        clnt       other
pin           66195           0           0        7538
in use       147831           0        4788
 ucomprsd     93428
 comprsd      54403
--------------------------------------------------------------------------------------
True Memory: 131072

CurSz        %Cur       TgtSz        %Tgt       MaxSz       %Max     CRatio
ucomprsd     105004       80.11       37450       28.57           -          -          -
comprsd       26068       19.89       93622       71.43       45308      34.57       2.45

                txf         cxf         dxf         dxm
AME            2.00        1.48        0.52       67641

To display memory expansion information with true memory snapshot turned-off (in a system with Active Memory Expansion enabled), enter:

# svmon -G -O summary=ame,tmem=off

Unit: page
--------------------------------------------------------------------------------------
               size       inuse        free         pin     virtual  available   mmode
memory       262144      152619       43061       73733      154779      41340   Ded-E
 ucomprsd         -       98216           -
 comprsd          -       54403           -
pg space     131072        1212

               work        pers        clnt       other
pin           66195           0           0        7538
in use       147831           0        4788
 ucomprsd     93428
 comprsd      54403