Performance Management Guide

Performance Reporting and Analysis Commands

Performance reporting and analysis commands give you information on the performance of one or more aspects of the system, or on one or more of the parameters that affect performance. The commands are as follows:

Command: Function
alstat: Reports alignment exceptions counts
atmstat: Shows Asynchronous Transfer Mode (ATM) adapter statistics
curt: Reports CPU utilization for each kernel thread (beginning with AIX 5.2)
emstat: Reports emulation instruction counts
entstat: Shows ethernet device driver and device statistics
fddistat: Shows FDDI device driver and device statistics
filemon: Uses the trace facility to report on the I/O activity of physical volumes, logical volumes, individual files, and the Virtual Memory Manager
fileplace: Displays the physical or logical placement of the blocks that constitute a file within the physical or logical volume on which they reside
gprof: Reports the flow of control among the subroutines of a program and the amount of CPU time consumed by each subroutine
ifconfig: Configures or displays network interface parameters for a network using TCP/IP
ioo: Sets I/O related tuning parameters (along with vmo, replaces vmtune beginning with AIX 5.2)
iostat: Displays utilization data for:

Terminals
CPU
Disks
Adapters (beginning with AIX 5.1)

ipfilter: Extracts different operation headers from an ipreport output file and displays them in a table
ipreport: Generates a packet trace report from the specified packet trace file
iptrace: Provides interface-level packet tracing for Internet protocols
lockstat: Displays information about kernel lock contention (only available in AIX Version 4)
locktrace: Turns on lock tracing (beginning with AIX 5.1)
lsattr: Displays attributes of the system that affect performance, such as:

Processor speed (beginning with AIX 5.1)
Size of the caches
Size of real memory
Maximum number of pages in the block I/O buffer cache
Maximum number of kilobytes of memory allowed for mbufs
High- and low-water marks for disk-I/O pacing

lsdev: Displays devices in the system and their characteristics
lslv: Displays information about a logical volume
lsps: Displays the characteristics of paging spaces
lspv: Displays information about a physical volume within a volume group
lsvg: Displays information about volume groups
mtrace: Prints a multicast path from a source to a receiver
netpmon: Uses the trace facility to report on network activity, including:

CPU consumption
Data rates
Response time

netstat: Displays a wide variety of configuration information and statistics on communications activity, such as:

Current status of the mbuf pool
Routing tables
Cumulative statistics on network activity

nfso: Displays (or changes) the values of NFS options
nfsstat: Displays statistics on Network File System (NFS) and Remote Procedure Call (RPC) server and client activity
no: Displays (or changes) the values of network options, such as:

Default send and receive socket buffer sizes
Maximum total amount of memory used in mbuf and cluster pools

pdt_config: Starts, stops, or changes the parameters of the Performance Diagnostic Tool
pdt_report: Generates a PDT report based on the current historical data
pprof: Reports CPU usage of all kernel threads over a period of time
prof: Displays object file profile data
ps: Displays statistics and status information about the processes in the system, such as:

Process ID
I/O activity
CPU utilization

sar: Displays statistics on operating-system activity, such as:

Directory accesses
Read and write system calls
Forks and execs
Paging activity

schedtune: Displays (or changes) the values of VMM memory-load-control parameters, the CPU-time-slice duration, and the paging-space-low retry interval
schedo: Sets tuning parameters for CPU scheduler (replaces schedtune starting with AIX 5.2)
smitty: Displays (or changes) system-management parameters
splat: Lock contention analysis tool (beginning with AIX 5.2)
svmon: Reports on the status of memory at system, process, and segment levels
tcpdump: Prints out packet headers
time, timex: Prints the elapsed and CPU time used by the execution of a command
topas: Reports selected local system statistics
tokstat: Shows Token-Ring device driver and device statistics
tprof: Uses the trace facility to report the CPU consumption of kernel services, library subroutines, application-program modules, and individual lines of source code in the application program
trace, trcrpt: Writes a file that records the exact sequence of activities within the system
traceroute: Prints the route that IP packets take to a network host
vmo: Sets VMM related tuning parameters (along with ioo, replaces vmtune beginning with AIX 5.2)
vmstat: Displays VMM data, such as:

Number of processes that are dispatchable or waiting
Page-frame free-list size
Page-fault activity
CPU utilization

vmtune: Displays (or changes) the page-replacement algorithm parameters for the Virtual Memory Manager (VMM)