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Home > Forums > MIS/IT > Operating Systems - UNIX based > IBM: AIX > FAQs

IBM: AIX FAQ

AIX Commands

performance commands in aix 4.3.3 by arvibm
faq52-3204
Posted: 18 Feb 03 (Edited 19 Feb 03)

Fileset Commands  
bos.acct iostat, vmstat, sar, timex  
bos.rte ps, lsps, lsattr, lsdev, lspv, lslv, lsvg, chdev, chlv, mkps, chps, migratepv, reorgvg, nice, renice, wlmstat  
bos.sysmgt trace, trcrpt, pstat  
bos.net.client netstat, nfsstat, ifconfig, no, nfso  
bos.net.server iptrace, ipreport, tcpdump  
bos.perf Performance Diagnotic Tool (PDT)  
bos.adt.prof prof, grof  
bos.adt.samples  vmtune, emstat, schedtune
perfagent.tools filemon, fileplace, netpmon, svmon, tprof, rmss, syscalls, lockstat, fdpr, stem, bf, bfrpt, stripnm, genkld, genld, genkex, topas (monitor like for AIX 4.3.3+)
bos.perf.tools
    (AIX 5.1) tprof, svmon, filemon, topas
  
Performance Toolbox for AIX (Licensed Program Product (LPP))
Fileset Commands  
perfmgr.local xmperf
perfmgr.network xmperf, chmon
  
Tools from the Web
nmon, perfpmr, monitor, PV, xgprof, Xprofiler

***********************************************************

Pls set the default value of some parameter  listed below.This will help in performance improvement

This can be set by the command   /usr/kernel/sample/vmtune
-f   minfree    120xN(default)      if 4 cpu it is 480
-F   maxfree    128xN (default)                    512
-R   = maxfree -minfree  =32
-P min perm  5
-p macperm   10
-s  1
-b  200
-B    800

This entry u have to put in the /etc/rc before the mount all command...
************************************************************
Performance improvement for FASTt500
-------------------------------------

This info is generally applicable to AIX systems
using FAStT storage.

Config/tuning parameters for AIX using FAStT:

FC adapter attribute changes:

     lg_term_dma from 0x200000 to 0x1000000
     (from 2 MB to 16 MB)

         #lattr -El fcs0
         #chdev -l fcs0 -a lg_term_dma=0x1000000 -P
         #cfgmgr
         #lsattr -El fcs0

     num_cmd_elems from 200 to 1024

         #lattr -El fcs0
         #chdev -l fcs0 -a num_cmd_elems=1024 -P
         #cfgmgr
         #lsattr -El fcs0

DAR attribute changes:

     load_balancing was set to yes

         #lsattr -El dar0
         #chdev -l dar0 -a load_balancing=yes
         #lsattr -El dar0

     autorecovery was set to yes

         #lsattr -El dar0
         #chdev -l dar0 -a autorecovery=yes
         #lsattr -El dar0

hdisk attribute changes: [VG must be varied-off]

     queue_depth from the default to 16

         #lsattr -El hdisk
         #chdev -l hdiskX queue_depth=16
         #lsattr -El hdisk

     prefetch_mult from 0 to 8

         #lsattr -El hdisk
         #chdev -l hdiskXX prefetch_mult=8
         #lsattr -El hdisk

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