The Shared Address Space Analysis report provides information
on DASD page activity, main storage activity including
expanded storage, pages stolen, pages locked, and resident
pages available for all shared address spaces on a z/VM
system.
INTENDED USE:
The report is designed to help analyze how much physical
memory the virtual machine is using by tracking residency
data for each virtual machine. This can help predict when
more physical memory needs to be brought online. This
information is essential to tracking the memory residency of
VDISK address spaces.
FORMAT:
A tabular listing that contains one line of information
for each address space active during the reporting period.
The report is ordered by ascending Owner sequence (lowest
to highest). In addition to the Owner, the following
columns are shown on the report:
Address Space Name - Address space identifier
Size - Defined address space size
Under Address Space Storage:
Resident:
LT 2GB - number of pages less than 2GB that were
resident
GT 2GB - number of pages greater than 2GB that
were resident
Locked:
LT 2GB - number of pages residing in storage less
than 2GB locked by the address space
GT 2GB - number of pages residing in storage greater
than 2GB locked by the address space
Paged Out:
DASD - number of pages read from DASD into main
storage
XSTOR - number of pages read from expanded storage
into main storage
Under Pages Per Second:
Stolen - number of page frames taken from the
address space per second
DASD:
IN - number of pages written from main storage to
DASD per second
OUT - number of pages written from DASD to main
storage per second
Expanded Storage:
IN - number of pages written to expanded storage
from main storage per second
OUT - number of pages read from expanded storage
into main storage per second
Mig - number of pages migrated from DASD to
expanded storage per second
An example of this report is shown in Figure 3-26.
INQUIRY ID:
VMXLS4
DATA SOURCE (File/Timespan):
VMXASC01 - DETAIL
DATA ELEMENTS USED:
USER - User Identification
ASCNAME - Address Space Name
ASCDEFSZ - Defined Address Space Size
ASCTRSAF - Resident Pages <2G
ASCCTPRG - Resident Pages >2G
ASCPGLOK - Pages Locked <2G
ASCCPLKA - Pages Locked >2G
ASCCTPGR - Pages Read from DASD
ASCCTXRD - Pages Written to DASD
ASCPGSRT - Pages Stolen per Second
ASCPGWRT - Pages Written to DASD per Second
ASCPGRRT - Pages Read from DASD per Second
ASCPGWXS - Pages Written to XSTOR per Second
ASCPGRXS - Pages Read from XSTOR per Second
ASCPSMGD - Pgs Migrated from DASD to XSTOR per Sec'd
USAGE CONSIDERATIONS:
None
+----------------------------------------------------------------------------------------------------------------------------------- | | S H A R E D A D D R E S S S P A C E A N A L Y S I S | | | z/VM System ID SYSA Start DDMMMYY:HH:MM:SS.XX Inter | Release VnRn End DDMMMYY:HH:MM:SS.XX | +----------------------------------------------------------------------------------------------------------------------------------- | DETAILS FOR ALL OWNERS +----------------------------------------------------------------------------------------------------------------------------------- | <----------- Address Space Pages ------------> <------------- Pages per Second - | <- Resident -> <-- Locked --> <- Paged Out-> <--- DASD ---> <- Expand | Owner Address Space Name Size LT 2GB GT 2GB LT 2GB GT 2GB DASD XSTOR Stolen In Out In |-------- ------------------------ ----------- ------ ------ ------ ------ ------ ------ ------ ------ ------ ------ - | CCIVM BASE 33554431 181 0 1 0 0 1 0 0 0 0 | CCIVM CCIDS 2147483647 0 0 0 0 0 0 0 4 0 0 | SYSTEM FULL$TRACK$CACHE$1 2147483647 0 0 0 0 0 0 1 0 5 0 | SYSTEM ISFCDATASPACE 2147483647 67 0 48 0 0 0 0 0 0 0 | SYSTEM PTRM0000 4294967295 6492 0 0 0 0 0 0 2 0 0 | SYSTEM REAL 1610612735 0 0 0 0 0 0 0 0 3 0 | SYSTEM SYSTEM 2147483647 50 0 0 0 0 0 1 0 0 0 | SYSTEM VDISK$SYSLD40A$0200$0001 1611661311 0 0 0 0 0 0 0 6 0 0 | SYSTEM VDISK$SYSLSS27$0200$0004 210763775 0 0 0 0 0 0 0 0 0 0 | SYSTEM VDISK$SYSLW40A$01F0$0002 263192575 3 0 0 0 0 0 2 0 0 0 | SYSTEM VDISK$SYDLW40A$01F1$0003 105906175 5 0 0 0 0 0 0 3 0 0 | SYSTEM VIRTUAL$FREE$STORAGE 2147483647 0 0 0 0 0 0 0 8 0 0 +-----------------------------------------------------------------------------------------------------------------------------------
Figure 3-26. Shared Address Space Analysis Report
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