[Discuss] Limiting amount of memory

[Tim Callaghan]

Ugh, this is frustrating.  I asked for 8192M (8G), but ended up with 5.79G.

*I booted using this section from /etc/grub.conf:*

title CentOS (2.6.18-348.3.1.el5) 8G
root (hd0,0)
kernel /boot/vmlinuz-2.6.18-348.3.1.el5 ro root=LABEL=/ mem=8192M
initrd /boot/initrd-2.6.18-348.3.1.el5.img

*and here is what I get from "cat /proc/meminfo"*

[root at lex6 ~]# cat /proc/meminfo
MemTotal:      6077760 kB
MemFree:       5799244 kB
Buffers:         16500 kB
Cached:         137380 kB
SwapCached:          0 kB
Active:          67080 kB
Inactive:       135288 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      6077760 kB
LowFree:       5799244 kB
SwapTotal:    20482864 kB
SwapFree:     20482864 kB
Dirty:             188 kB
Writeback:           0 kB
AnonPages:       48384 kB
Mapped:          10660 kB
Slab:            31712 kB
PageTables:       3232 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  23521744 kB
Committed_AS:   110236 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    273564 kB
VmallocChunk: 34359462699 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB



On Fri, Sep 13, 2013 at 9:59 AM, Richard Pieri <richard.pieri at gmail.com>wrote:

> Bill Bogstad wrote:
>
>> On my system, they both provide identical info (If you look at the
>> right field):
>>
>
> Mine usually do but I recall seeing some exceptions. free does some
> "interesting" rounding if you use the -g or -m switches.
>
> --
> Rich P.
>
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