I tried to install CentOS 7, 64bit on a $4/mo. VPS from ICPH, this is an OpenVZ VPS and has 128MB RAM guaranteed and 256MB RAM is burstable (not guaranteed). Also there is a vSWAP of 256Mb:


# cat /etc/red*
CentOS Linux release 7.1.1503 (Core)

# w
16:39:03 up 3 min, 0 users, load average: 0.02, 0.03, 0.00
USER TTY FROM [email protected] IDLE JCPU PCPU WHAT
[[email protected] /]# free -m
total used free shared buff/cache available
Mem: 256 11 173 0 70 182
Swap: 256 0 256

# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/ploop34607p1 4.9G 766M 3.9G 17% /
devtmpfs 128M 0 128M 0% /dev
tmpfs 128M 0 128M 0% /dev/shm
tmpfs 128M 60K 128M 1% /run
tmpfs 128M 0 128M 0% /sys/fs/cgroup

# ps auxf
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 1.3 54032 3612 ? Ss 16:35 0:00 init -z
root 2 0.0 0.0 0 0 ? S 16:35 0:00 [kthreadd/2290]
root 3 0.0 0.0 0 0 ? S 16:35 0:00 \_ [khelper/2290]
root 72 0.0 1.2 42968 3364 ? Ss 16:36 0:00 /usr/lib/systemd/systemd-journald
root 88 0.0 0.6 40600 1648 ? Ss 16:36 0:00 /usr/lib/systemd/systemd-udevd
root 114 0.0 0.9 279644 2488 ? Ssl 16:36 0:00 /usr/sbin/rsyslogd -n
dbus 115 0.0 0.5 26380 1564 ? Ss 16:36 0:00 /bin/dbus-daemon --system --address=systemd: --nofork --nopi
root 116 0.0 0.5 32540 1460 ? Ss 16:36 0:00 /usr/lib/systemd/systemd-logind
root 120 0.0 0.5 22724 1512 ? Ss 16:36 0:00 /usr/sbin/crond -n
root 121 0.0 0.3 6376 796 tty2 Ss+ 16:36 0:00 /sbin/agetty --noclear tty2
root 122 0.0 0.3 6376 796 tty1 Ss+ 16:36 0:00 /sbin/agetty --noclear --keep-baud console 115200 38400 9600
root 139 0.0 0.3 71264 996 ? Ss 16:36 0:00 /usr/sbin/saslauthd -m /run/saslauthd -a pam -n 2
root 141 0.0 0.2 71264 724 ? S 16:36 0:00 \_ /usr/sbin/saslauthd -m /run/saslauthd -a pam -n 2
root 360 0.0 1.3 82460 3612 ? Ss 16:36 0:00 /usr/sbin/sshd -D
root 361 0.0 1.7 208880 4712 ? Ss 16:36 0:00 /usr/sbin/httpd -DFOREGROUND
apache 392 0.0 0.9 208880 2540 ? S 16:36 0:00 \_ /usr/sbin/httpd -DFOREGROUND
root 373 0.0 0.2 27128 716 ? Ss 16:36 0:00 /usr/sbin/xinetd -stayalive -pidfile /var/run/xinetd.pid
root 374 0.0 0.8 90236 2296 ? Ss 16:36 0:00 sendmail: accepting connections
smmsp 389 0.0 0.7 85672 2004 ? Ss 16:36 0:00 sendmail: Queue [email protected]:00:00 for /var/spool/clientmqueue
root 408 0.0 0.2 27560 564 ? Ss 16:38 0:00 vzctl: pts/0
root 409 0.0 0.7 11696 1876 pts/0 Ss 16:38 0:00 \_ -bash
root 442 0.0 0.4 19712 1208 pts/0 R+ 16:47 0:00 \_ ps auxf
image is more readable:
http://s20.postimg.org/72mhl98y5/cen...ll_df_w_ps.gif
OR
http://i.snag.gy/CG2vl.jpg