AIX 5L Problem Determination - IBM Redbooks

► Workload Management Class (-W)
Displays memory usage statistics for the specified workload management
classes. If no classes are supplied, memory usage statistics display all
defined classes.
To support 64-bit applications, the output format of the svmon command was
modified in AIX Version 4.3.3 and later. Additional reports are available in
operating system versions later than AIX Version 4.3.3, as follows:
► Frame (-F)
Displays information about frames. When no frame number is specified, the
percentage of used memory is reported. When a frame number is specified,
information about that frame is reported.
► Tier (-T)
Displays information about tiers, such as the tier number, the superclass
name when the -a flag is used, and the total number of pages in real memory
from segments belonging to the tier.
10.2.4 The schedtune command
The schedtune command sets parameters for the CPU scheduler and virtual
memory manager processing. With the schedtune command you can change the
scheduler parameters at run time, and these changes will be cleared at the next
reboot. Edit rc.local with any preferred schedtune settings and run the command
from the rc.local file to use the changes. The rc.local file should be executed from
/etc/inittab. When using this command, be sure you are comfortable with the
appropriate tuning sections before using schedtune to change system
parameters, as misuse of this command can cause performance degradation or
operating system failure. When executing the schedtune command without flags,
the current values will be shown:
# /usr/samples/kernel/schedtune
THRASH SUSP FORK SCHED
-h -p -m -w -e -f -d -r -t -s
SYS PROC MULTI WAIT GRACE TICKS SCHED_D SCHED_R TIMESLICE MAXSPIN
0 4 2 1 2 10 16 16 1 16384
CLOCK
-c
%usDELTA
100
254 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques