Chapter 4. AIX 91
4.2.6 Installing DSO
The AIX DSO is available as a separately chargeable premium package that includes the two
new types of optimizations: Large page optimization and memory prefetch optimization. The
package name is dso.aso and is installable using installp or smitty, as with any
AIX package.
ASO detects the installation of this package automatically and enables memory prefetch and
large page optimization. After installation, no restart of the operating system or ASO
is required.
4.2.7 Log files
Information about the functioning of ASO and its various optimizations are logged in the
following files:
/var/log/aso/aso.log
This file lists major ASO events, such as when it is enabled or disabled or when it
hibernates. It also contains a basic audit trail of optimizations that are performed to
workloads. Example 4-1 shows a sample aso.log file.
Example 4-1 Sample aso.log file that lists major ASO events
# ASO log configuration
aso.notice /var/log/aso/aso.log rotate size 128k time 7d
aso.info /var/log/aso/aso_process.log rotate size 1024k
Example 4-2 shows a sample aso.log file that results from insufficient CPU entitlement
on an SPLPAR.
Example 4-2 Sample aso.log file that shows insufficient CPU entitlement on an SPLPAR
Oct 20 02:15:04 p7e04 aso:notice aso[13238402]: [HIB] Current number of system
virtual cpus too low (1 cpus)
Oct 20 02:15:04 p7e04 aso:notice aso[13238402]: [HIB] Increase system virtual
cpus
to at least 3 cpus to run ASO. Hibernating.
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