Reference Guide

Data 231
HPUX_System Data
Swap_ Outs Metric The number of processes stored per second from active memory
to disk swap space.
Swap-outs are based on sleep time or memory shortage.
Sleep time: If a process has not been used for more than 20
seconds, it is likely to be swapped out, even when there is
adequate free memory available.
Memory shortage: When the amount of memory is critical, and
a process has been idle, the system will swap out all its pages at
once, rather than wait for the paging algorithm to collect them.
In extreme memory shortages, the kernel might swap out
runnable processes, which also consumes a substantial portion
of system resources. The system resources are therefore devoted
to memory housekeeping rather than useful work.
Swap_ Percent_
Available
Metric The percentage of available swap space. Allocate enough swap
space to support all the processes or applications running on the
host.
System_Calls_Rate Metric The number of system calls invoked.
Field Type Description