What is consuming memory?
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by Milan Babuškov
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Published on 2010-06-05T23:06:47Z
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2010/06/05
23:12 UTC
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I have a VPS with standard LAMP stack and a busy website. Operating system is CentOS 5.5. Virtualization is done with VMWare. My server gets real slow about every 6 hours. Logging into it I see that 1.6GB of RAM is consumed. However, listing the active processes does not explain the problem. Can anyone make any sense of this?
"free" shows this:
total used free shared buffers cached
Mem: 2059456 2049280 10176 0 14780 380968
-/+ buffers/cache: 1653532 405924
Swap: 2096472 96 2096376
While this is output of "ps":
[root@vmi29 /]# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 10348 688 ? Rs Jun05 0:01 init [3]
root 2 0.0 0.0 0 0 ? S< Jun05 0:00 [migration/0]
root 3 0.0 0.0 0 0 ? SN Jun05 0:00 [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? S< Jun05 0:00 [migration/1]
root 5 0.0 0.0 0 0 ? SN Jun05 0:00 [ksoftirqd/1]
root 6 0.0 0.0 0 0 ? S< Jun05 0:00 [migration/2]
root 7 0.0 0.0 0 0 ? SN Jun05 0:00 [ksoftirqd/2]
root 8 0.0 0.0 0 0 ? S< Jun05 0:00 [migration/3]
root 9 0.0 0.0 0 0 ? SN Jun05 0:00 [ksoftirqd/3]
root 10 0.0 0.0 0 0 ? S< Jun05 0:06 [events/0]
root 11 0.0 0.0 0 0 ? S< Jun05 0:00 [events/1]
root 12 0.0 0.0 0 0 ? S< Jun05 0:00 [events/2]
root 13 0.0 0.0 0 0 ? S< Jun05 0:00 [events/3]
root 14 0.0 0.0 0 0 ? S< Jun05 0:00 [khelper]
root 31 0.0 0.0 0 0 ? S< Jun05 0:00 [kthread]
root 38 0.0 0.0 0 0 ? S< Jun05 0:00 [kblockd/0]
root 39 0.0 0.0 0 0 ? S< Jun05 0:00 [kblockd/1]
root 40 0.0 0.0 0 0 ? S< Jun05 0:00 [kblockd/2]
root 41 0.0 0.0 0 0 ? S< Jun05 0:00 [kblockd/3]
root 42 0.0 0.0 0 0 ? S< Jun05 0:00 [kacpid]
root 204 0.0 0.0 0 0 ? S< Jun05 0:00 [cqueue/0]
root 205 0.0 0.0 0 0 ? S< Jun05 0:00 [cqueue/1]
root 206 0.0 0.0 0 0 ? S< Jun05 0:00 [cqueue/2]
root 207 0.0 0.0 0 0 ? S< Jun05 0:00 [cqueue/3]
root 210 0.0 0.0 0 0 ? S< Jun05 0:00 [khubd]
root 212 0.0 0.0 0 0 ? S< Jun05 0:00 [kseriod]
root 302 0.0 0.0 0 0 ? S Jun05 0:00 [khungtaskd]
root 303 0.0 0.0 0 0 ? S Jun05 0:00 [pdflush]
root 304 0.0 0.0 0 0 ? S Jun05 0:01 [pdflush]
root 305 0.0 0.0 0 0 ? S< Jun05 0:05 [kswapd0]
root 306 0.0 0.0 0 0 ? S< Jun05 0:00 [aio/0]
root 307 0.0 0.0 0 0 ? S< Jun05 0:00 [aio/1]
root 308 0.0 0.0 0 0 ? S< Jun05 0:00 [aio/2]
root 309 0.0 0.0 0 0 ? S< Jun05 0:00 [aio/3]
root 515 0.0 0.0 0 0 ? S< Jun05 0:00 [kpsmoused]
root 582 0.0 0.0 0 0 ? S< Jun05 0:00 [mpt_poll_0]
root 583 0.0 0.0 0 0 ? S< Jun05 0:00 [mpt/0]
root 584 0.0 0.0 0 0 ? S< Jun05 0:00 [scsi_eh_0]
root 590 0.0 0.0 0 0 ? S< Jun05 0:00 [ata/0]
root 591 0.0 0.0 0 0 ? S< Jun05 0:00 [ata/1]
root 592 0.0 0.0 0 0 ? S< Jun05 0:00 [ata/2]
root 593 0.0 0.0 0 0 ? S< Jun05 0:00 [ata/3]
root 594 0.0 0.0 0 0 ? S< Jun05 0:00 [ata_aux]
root 610 0.0 0.0 0 0 ? S< Jun05 0:00 [kstriped]
root 631 0.0 0.0 0 0 ? S< Jun05 0:05 [kjournald]
root 656 0.0 0.0 0 0 ? S< Jun05 0:00 [kauditd]
root 689 0.0 0.0 13364 928 ? S<s Jun05 0:00 /sbin/udevd -d
root 2123 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpathd/0]
root 2124 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpathd/1]
root 2126 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpathd/2]
root 2127 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpathd/3]
root 2128 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpath_handlerd]
root 2203 0.0 0.0 0 0 ? S< Jun05 0:00 [kjournald]
root 2613 0.0 0.0 5908 648 ? Ss Jun05 0:00 syslogd -m 0
root 2617 0.0 0.0 3804 424 ? Ss Jun05 0:00 klogd -x
root 2707 0.0 0.0 10760 372 ? Ss Jun05 0:02 irqbalance
apache 2910 0.5 0.6 213964 12912 ? S 00:22 0:07 /usr/sbin/httpd
dbus 3011 0.0 0.0 21256 904 ? Ss Jun05 0:00 dbus-daemon --system
root 3025 0.0 0.0 3800 576 ? Ss Jun05 0:00 /usr/sbin/acpid
68 3038 0.0 0.2 31152 4336 ? Ss Jun05 0:01 hald
root 3039 0.0 0.0 21692 1176 ? S Jun05 0:00 hald-runner
68 3046 0.0 0.0 12324 856 ? S Jun05 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.s
68 3052 0.0 0.0 12324 856 ? S Jun05 0:00 hald-addon-keyboard: listening on /dev/input/event0
root 3105 0.0 0.0 62624 1212 ? Ss Jun05 0:00 /usr/sbin/sshd
root 3264 0.0 0.0 74820 1156 ? Ss Jun05 0:00 crond
root 3292 0.0 0.0 18416 472 ? S Jun05 0:00 /usr/sbin/smartd -q never
root 3300 0.0 0.0 3792 480 tty2 Ss+ Jun05 0:00 /sbin/mingetty tty2
root 3301 0.0 0.0 3792 480 tty3 Ss+ Jun05 0:00 /sbin/mingetty tty3
root 3302 0.0 0.0 3792 484 tty4 Ss+ Jun05 0:00 /sbin/mingetty tty4
root 3304 0.0 0.0 3792 480 tty5 Ss+ Jun05 0:00 /sbin/mingetty tty5
root 3306 0.0 0.0 3792 480 tty6 Ss+ Jun05 0:00 /sbin/mingetty tty6
apache 5158 0.4 0.5 211896 11848 ? S 00:28 0:04 /usr/sbin/httpd
apache 5519 0.4 0.5 211896 11992 ? S 00:29 0:03 /usr/sbin/httpd
root 5649 0.0 0.0 63848 1184 pts/0 S Jun05 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --soc
mysql 5696 2.1 1.9 411060 40392 pts/0 Rl Jun05 2:01 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql
apache 5943 0.4 0.5 211896 12000 ? S 00:30 0:03 /usr/sbin/httpd
apache 5976 0.6 0.5 211896 11792 ? S 00:30 0:04 /usr/sbin/httpd
apache 6073 0.4 0.5 211896 11208 ? S 00:31 0:03 /usr/sbin/httpd
apache 6122 0.4 0.5 211896 11848 ? S 00:31 0:03 /usr/sbin/httpd
apache 6128 0.3 0.5 211896 11940 ? S 00:31 0:02 /usr/sbin/httpd
apache 6159 0.5 0.5 211896 11872 ? S 00:31 0:04 /usr/sbin/httpd
apache 6636 0.4 0.6 213960 13444 ? S 00:32 0:02 /usr/sbin/httpd
apache 6787 0.3 0.5 211884 11308 ? S 00:33 0:02 /usr/sbin/httpd
apache 6796 0.4 0.5 211884 12024 ? S 00:33 0:02 /usr/sbin/httpd
apache 6801 0.3 0.5 211896 11920 ? S 00:33 0:01 /usr/sbin/httpd
apache 6804 0.4 0.5 211884 11848 ? S 00:33 0:02 /usr/sbin/httpd
apache 6825 0.4 0.5 211896 11972 ? S 00:33 0:02 /usr/sbin/httpd
apache 6866 0.3 0.5 210860 11044 ? S 00:33 0:01 /usr/sbin/httpd
apache 6870 0.2 0.5 211896 11108 ? S 00:33 0:01 /usr/sbin/httpd
apache 6872 0.3 0.5 211896 11900 ? S 00:33 0:01 /usr/sbin/httpd
apache 6993 0.3 0.5 211896 11836 ? S 00:33 0:02 /usr/sbin/httpd
apache 6994 0.3 0.5 211896 11792 ? S 00:33 0:01 /usr/sbin/httpd
apache 7136 0.2 0.5 211896 11432 ? S 00:34 0:01 /usr/sbin/httpd
apache 7143 0.2 0.5 210860 11052 ? S 00:34 0:01 /usr/sbin/httpd
apache 7145 0.2 0.5 211896 11136 ? S 00:34 0:01 /usr/sbin/httpd
apache 7266 0.2 0.6 213952 12748 ? S 00:34 0:01 /usr/sbin/httpd
apache 7299 0.2 0.5 211884 11276 ? S 00:34 0:01 /usr/sbin/httpd
apache 7311 0.2 0.5 211884 11300 ? S 00:34 0:01 /usr/sbin/httpd
apache 7313 0.3 0.5 211884 11876 ? S 00:34 0:01 /usr/sbin/httpd
apache 7345 0.2 0.5 210872 11100 ? S 00:34 0:01 /usr/sbin/httpd
apache 7349 0.2 0.5 210860 11008 ? S 00:34 0:01 /usr/sbin/httpd
apache 7350 0.2 0.5 211896 11832 ? S 00:34 0:01 /usr/sbin/httpd
apache 7351 0.1 0.5 211884 11072 ? S 00:34 0:00 /usr/sbin/httpd
apache 7352 0.2 0.5 210872 11096 ? S 00:34 0:01 /usr/sbin/httpd
apache 7449 0.1 0.5 210860 11020 ? S 00:35 0:00 /usr/sbin/httpd
root 7490 0.3 0.0 0 0 ? S Jun05 3:11 [vmmemctl]
root 7597 0.0 0.0 72656 1260 ? Ss Jun05 0:06 /usr/lib/vmware-tools/sbin64/vmware-guestd --background /va
apache 7720 0.1 0.5 210860 10748 ? S 00:36 0:00 /usr/sbin/httpd
apache 7726 0.1 0.4 209836 9304 ? R 00:36 0:00 /usr/sbin/httpd
apache 7727 0.1 0.5 210860 10916 ? S 00:36 0:00 /usr/sbin/httpd
apache 7731 0.1 0.5 210860 10780 ? S 00:36 0:00 /usr/sbin/httpd
apache 7732 0.3 0.5 210860 10916 ? S 00:36 0:01 /usr/sbin/httpd
apache 7733 0.1 0.5 210872 11000 ? S 00:36 0:00 /usr/sbin/httpd
apache 7735 0.1 0.5 211884 11048 ? S 00:36 0:00 /usr/sbin/httpd
apache 7761 0.1 0.5 210860 10552 ? S 00:36 0:00 /usr/sbin/httpd
apache 7776 0.1 0.4 209836 8648 ? R 00:37 0:00 /usr/sbin/httpd
apache 7790 0.2 0.3 208812 7724 ? R 00:40 0:00 /usr/sbin/httpd
apache 7800 0.2 0.3 208812 8088 ? R 00:40 0:00 /usr/sbin/httpd
root 7801 0.0 0.0 3792 484 tty1 Ss+ 00:41 0:00 /sbin/mingetty tty1
apache 7820 0.2 0.3 208812 7552 ? R 00:41 0:00 /usr/sbin/httpd
apache 7834 0.2 0.3 207788 6756 ? R 00:42 0:00 /usr/sbin/httpd
apache 7864 0.2 0.2 207788 6148 ? R 00:42 0:00 /usr/sbin/httpd
apache 7872 0.3 0.2 207788 5856 ? R 00:43 0:00 /usr/sbin/httpd
apache 7874 2.5 0.3 207788 6336 ? R 00:43 0:00 /usr/sbin/httpd
root 7875 0.3 0.0 63844 1056 ? S 00:43 0:00 sh -c lsb_release -sd 2>/dev/null
root 7879 1.6 0.0 65604 964 pts/0 R+ 00:43 0:00 ps aux
root 16316 0.0 0.1 90128 3272 ? Ss Jun05 0:00 sshd: milanb [priv]
milanb 16358 0.0 0.0 90128 1752 ? S Jun05 0:00 sshd: milanb@pts/0
milanb 16360 0.0 0.0 66076 1480 pts/0 Ss Jun05 0:00 -bash
root 16875 0.0 0.0 101068 1324 pts/0 S Jun05 0:00 su -
root 16877 0.0 0.0 66184 1692 pts/0 S Jun05 0:00 -bash
root 24373 0.0 0.3 206764 7348 ? Rs Jun05 0:01 /usr/sbin/httpd
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