GPA Manual

Glossary
Guardian Performance Analyzer (GPA) Manual—135081
Glossary-2
node swap rate
node swap rate. The total number of page swaps per second taking place on all the
processors on a system.
page swap. The transfer by a CPU of a page of data or code from disk to memory.
PCB. A Process Control Block is a data area in a CPU dedicated to the control of process
execution.
PIN. A Process Identification Number is the numeric value that identifies a process running
on a CPU.
PUPBAK. A PUP command file that restores a system to its original measured state.
PUPIN. A PUP command file that contains PUP PRIMARY and PUP SETCACHE
commands for implementing GPA tuning recommendations with regard to disk and
cache.
PUP PRIMARY command. A command used to assign the primary CPU for a disk process.
PUP SETCACHE command. A command used to allocate or change cache blocks for a disk
volume.
queue length. The average number of messages waiting to be serviced in a process’s queue
during the measurement period.
request. A message to a disk process asking for services (for example, to perform an I/O
operation).
request queue length. The interval between the time a disk process received a request and
the time it finishes processing the request.
SCF ALTER DISK, CACHE command. A command used to allocate or change cache
blocks for a disk volume.
SCF primary command. A command used to assign the primary CPU for a disk process.
SCFBAK. A SCF command file that restores a system to its original measured state.
SCFIN. A SCF command file that contains SCF PRIMARY and SCF ALTER DISK,
CACHE commands for implementing GPA tuning recommendations with regard to disk
and cache.
static process control block. A Process Control Block (PCB
) dedicated to a single process
for the duration of the measurement period analyzed by GPA.
system recovery. The condition whereby a system continues to function normally when a
processor failure occurs.