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Full Discussion: AIX performance
Top Forums UNIX for Dummies Questions & Answers AIX performance Post 302072093 by amro1 on Thursday 27th of April 2006 10:44:11 AM
Old 04-27-2006
here...

it is difficult to help minus details but try that:
1. if use SSA see that volume group is in a good health and you have no stale physical volumes, run defragmentation !
2. see system defs for maximum number of open files for a process and buffer limits for a process.
3. see in top what are the processes occupy most of the time, then in lsof figure out what takes it and then in iostat or vmstat see how the picture changes as you go trough steps 1 and 2.

Last edited by amro1; 04-27-2006 at 12:15 PM..
 

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VGREDUCE(8)						      System Manager's Manual						       VGREDUCE(8)

NAME
vgreduce - reduce a volume group SYNOPSIS
vgreduce [-a|--all] [-A|--autobackup y|n] [-d|--debug] [-h|-?|--help] [--removemissing] [-t|--test] [-v|--verbose] VolumeGroupName [Physi- calVolumePath...] DESCRIPTION
vgreduce allows you to remove one or more unused physical volumes from a volume group. OPTIONS
See lvm for common options. -a, --all Removes all empty physical volumes if none are given on command line. --removemissing Removes all missing physical volumes from the volume group, if there are no logical volumes allocated on those. This resumes normal operation of the volume group (new logical volumes may again be created, changed and so on). If this is not possible (there are logical volumes referencing the missing physical volumes) and you cannot or do not want to remove them manually, you can run this option with --force to have vgreduce remove any partial LVs. Any logical volumes and dependent snapshots that were partly on the missing disks get removed completely. This includes those parts that lie on disks that are still present. If your logical volumes spanned several disks including the ones that are lost, you might want to try to salvage data first by acti- vating your logical volumes with --partial as described in lvm (8). SEE ALSO
lvm(8), vgextend(8) Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) VGREDUCE(8)
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