G06.31 Software Installation and Upgrade Guide

Preparing to Upgrade the Server Software
G06.31 Software Installation and Upgrade Guide—544626-002
5-14
Check the Swap File Configuration
LDev Primary Backup Mirror MirrorBackup Primary Backup
PID PID
146 *STARTED STARTED *STARTED STARTED 0,299 1,267
STORAGE - Status DISK \ELI.$AUDIT
LDev Primary Backup Mirror MirrorBackup Primary Backup
PID PID
177 *STARTED STARTED *STARTED STARTED 0,291 1,276
3. If the $SYSTEM, DSM/SCM, and Archive volumes are not listed in the display,
contact your service provider.
4. Verify that the primary path, backup paths, mirror path, and mirror backup path are
started for the mirrored $SYSTEM volume. If any paths are stopped, start them.
5. Verify that the primary path and backup path are started for the $DSMSCM volume
and the $AUDIT volume. If any paths are stopped, start them.
Check the Swap File Configuration
You must ensure that you have configured kernel-managed swap files of sufficient size
for all your system and application software processes. The optimal amount of swap
space varies, depending on the configuration of your system. The default swap files
can allocate up to 256 megabytes (MB) per processor. However, many processes and
applications require more swap space. Inadequate swap space can cause process-
creation errors, abended processes, and halts.
Beginning with the G06.27 RVU, the default value of MAXEXTENTS for default kernel-
managed swap files increases from 128 MB to 256 MB, resulting in maximum default
swap file sizes of 256 MB per swap file. For more information, see the Kernel-
Managed Swap Facility (KMSF) Manual.
To check the size of the configured swap files for each processor:
1. At a TACL prompt, start NSKCOM:
$SYSTEM STARTUP 5> nskcom
2. Issue the STATUS SWAPFILE * command to display the peak pages reserved so
that you can compare that information to the total amount of swap space available.
3. Verify that each processor in the system has a configured swap file of at least 256
MB, the minimum for any G-series system. Depending on how many processes
you have, your system configuration might require more swap space.
For each processor, configure at least twice as much swap space as there is
memory. For example, if you have 256 MB of memory for each processor,
configure 512 MB of swap space. If you have 1 GB or 2 GB memory per processor,
you might need additional swap space.
Note. Configure swap files if necessary. See the Kernel-Managed Swap Facility (KMSF)
Manual
for information about how to configure swap files and for guidelines about how
much swap space should be allocated for each processor.