I've got a server w/ 4 gigs of ram in it (I'm running the SMP kernel,
not bigmem due to latency in bigmem), and I've got a hardware raid 10
set up, most of which is taken up by a LVM physical volume, and volume
group. I've created one logical volume that leaves some 8 gigs worth
of free space, for which I am attempting to create a snapshot. I'm
getting a rather strange error, and not finding much help out on google
and whatnot. This is a Dual Xeon 2.4ghz w/ Hyperthreading, so the OS
sees 4 cpus.
[root@xxxxxxxxx root]# lvcreate -c 4k --size 2048m --snapshot --name
snap1 /dev/mysql/data
lvcreate -- WARNING: the snapshot will be automatically disabled once it
gets full
lvcreate -- ERROR "Cannot allocate memory" creating VGDA for
"/dev/mysql/snap1" in kernel
total: used: free: shared: buffers: cached:
Mem: 3963469824 125816832 3837652992 0 8904704 42029056
Swap: 2146754560 0 2146754560
MemTotal: 3870576 kB
MemFree: 3747708 kB
MemShared: 0 kB
Buffers: 8696 kB
Cached: 41044 kB
SwapCached: 0 kB
Active: 74880 kB
ActiveAnon: 27476 kB
ActiveCache: 47404 kB
Inact_dirty: 684 kB
Inact_laundry: 0 kB
Inact_clean: 1652 kB
Inact_target: 15440 kB
HighTotal: 3014592 kB
HighFree: 2938496 kB
LowTotal: 855984 kB
LowFree: 809212 kB
SwapTotal: 2096440 kB
SwapFree: 2096440 kB
--- Volume group ---
VG Name mysql
VG Access read/write
VG Status available/resizable
VG # 0
MAX LV 10
Cur LV 1
Open LV 1
MAX LV Size 255.99 GB
Max PV 256
Cur PV 1
Act PV 1
VG Size 78.93 GB
PE Size 4 MB
Total PE 20207
Alloc PE / Size 18432 / 72 GB
Free PE / Size 1775 / 6.93 GB
VG UUID rGhVdJ-yHEz-P9T9-f753-Cta8-2DKj-9uZXFY
[root@xxxxxxxxx root]# lvdisplay /dev/mysql/data
--- Logical volume ---
LV Name /dev/mysql/data
VG Name mysql
LV Write Access read/write
LV Status available
LV # 1
# open 1
LV Size 70 GB
Current LE 17920
Allocated LE 17920
Allocation next free
Read ahead sectors 1024
Block device 58:0
So how is 4 gigs not enough ram?
[root@xxxxxxxxx root]# uname -a
Linux localhost.localdomain 2.4.20-18.9smp #1 SMP Thu May 29 06:55:05
EDT 2003 i686 i686 i386 GNU/Linux
--
Jesse Keating RHCE MCSE
http://geek.j2solutions.net
Mondo DevTeam (http://www.microwerks.net/~hugo/)
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