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Full Discussion: LVM Memory Usage
Operating Systems Linux Red Hat LVM Memory Usage Post 302756945 by ikn3 on Wednesday 16th of January 2013 06:44:36 PM
Old 01-16-2013
LVM Memory Usage

Hello
I am using LVM to create volumes.

After creating the volumes using "lvcreate" and then formating them as "ext3".
I mounted these volumes to find around 40 -50GB space wasted.

Any suggestions why?

Code:
 # df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sdb1             111G   16G   90G  15% /
/dev/sda1              99M   24M   71M  25% /boot
tmpfs                 5.9G     0  5.9G   0% /dev/shm
/dev/mapper/vg_oracle-lv_u91
                      699G  197M  664G   1% /u91
/dev/mapper/vg_oracle-lv_u92
                      955G  200M  907G   1% /u92


Last edited by jim mcnamara; 01-16-2013 at 07:54 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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