vz ~ # grep privvmpages /proc/bc/101/resources
            privvmpages                 36082                49989               192000               204800                    0
vz ~ # vzctl enter 101
entered into VE 101
cacti / # egrep 'Mem(Total|Free)' /proc/meminfo
MemTotal:       768000 kB
MemFree:        621476 kB
cacti / # logout
exited from VE 101

vz ~ # vzctl set 101 --privvmpages 250M:300M
UB limits were set successefully
WARNING: Settings were not saved and will be resetted to original values on next start (use --save flag)
vz ~ # grep privvmpages /proc/bc/101/resources
            privvmpages                 36529                49989                64000                76800                    0
vz ~ # vzctl enter 101
entered into VE 101
cacti / # egrep 'Mem(Total|Free)' /proc/meminfo
MemTotal:       768000 kB
MemFree:        619696 kB
cacti / # free
             total       used       free     shared    buffers     cached
Mem:        768000     148336     619664          0          0          0
-/+ buffers/cache:     148336     619664
Swap:            0          0          0

vz ~ # vzctl --version
vzctl version 3.0.22
vz ~ # uname -a
Linux vz 2.6.18-028stab053 #1 Mon Feb 18 16:33:59 MSK 2008 x86_64 AMD Athlon(tm) 64 Processor 3000+ AuthenticAMD GNU/Linux
vz ~ # lsmod
Module                  Size  Used by
simfs                   5776  3
vznetdev               22696  6
vzrst                 126880  0
vzcpt                 101808  0
vzdquota               42600  3 [permanent]
vzmon                  36624  6 vznetdev,vzrst,vzcpt
vzdev                   4360  3 vznetdev,vzdquota,vzmon

vzctl set 101 --privvmpages 250M:300M --save --setmod restart

vz ~ # vzctl set 101 --privvmpages 250M:300M --setmode restart --save
UB limits were set successefully
Saved parameters for VE 101
vz ~ # vzctl enter 101
entered into VE 101
cacti / # free -m
             total       used       free     shared    buffers     cached
Mem:           750        144        605          0          0          0
-/+ buffers/cache:        144        605
Swap:            0          0          0

vz ~ # cat /etc/vz/conf/101.conf
#  Copyright (C) 2000-2007 SWsoft. All rights reserved.
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

VERSION="2"

ONBOOT="yes"

# UBC parameters (in form of barrier:limit)
# Primary parameters
AVNUMPROC="40:40"
NUMPROC="65:65"
NUMTCPSOCK="80:80"
NUMOTHERSOCK="80:80"
VMGUARPAGES="25600:28160"
# Secondary parameters
KMEMSIZE="10485760:12582912"
TCPSNDBUF="319488:524288"
TCPRCVBUF="319488:524288"
OTHERSOCKBUF="132096:336896"
DGRAMRCVBUF="132096:132096"
OOMGUARPAGES="133120:9223372036854775807"
# Auxiliary parameters
LOCKEDPAGES="32:32"
SHMPAGES="8192:8192"
PRIVVMPAGES="76800:81920"
NUMFILE="2048:2048"
NUMFLOCK="100:110"
NUMPTY="16:16"
NUMSIGINFO="256:256"
DCACHESIZE="1048576:1097728"

PHYSPAGES="0:9223372036854775807"
NUMIPTENT="128:128"

# Disk quota parameters (in form of softlimit:hardlimit)
DISKSPACE="4097152:4306868"
DISKINODES="400000:420000"
QUOTATIME="0"

# CPU fair sheduler parameter
CPUUNITS="100000"
OFFLINE_MANAGEMENT="yes"
HOSTNAME="cacti.rcline.ru"
IP_ADDRESS="172.16.0.41"
CPULIMIT="90"