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Hello!
I've just finished setting up a test web server using Centos 5.5, and I find the resource usage quite high. With a similar setup my older redhat 9 takes ...
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- 07-14-2010 #1Just Joined!
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Centos 5.5 resource usage
Hello!
I've just finished setting up a test web server using Centos 5.5, and I find the resource usage quite high. With a similar setup my older redhat 9 takes up half this even with some user activity. There isn't any user activity except myself configuring & testing.
It's using almost 500 MB of RAM, and I need to know if this is normal before I set this into a production environment. It also seems to take up more RAM the longer the uptime has gone. On first boot it's maybe ~200 MB or less, and after a few days it'll be up to 500+.
I'll list my config, and then if there's anything else you guys need please let me know, thanks!
Centos 5.5 with everything updated (using yum update).
Apache, php, mysql, bind - all latest versions downloaded from the websites of these groups, and APF firewall with default settings and development mode enabled. There's also sendmail enabled but not yet configured.
No other software has been installed or touched, except a few services like cups which I stopped on boot with chkconfig.
If there's other info you need please tell me what it is and the best way for me to get it to you. Thanks!
- 07-14-2010 #2Just Joined!
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I'm by no means an expert, and in fact are having issues with my own CentOS5.5 box now, but that does seem high from what my box is running at (essentially the same stuff)
I've got 768mb of RAM, and only 357mb of it is actually used with everything running (including X), and its been running for...well actually only 1 day, but even in my long hauls with no reboots, I've never seen it higher.
A quick google search results with the command:
ps -aux --sort -rss
which will show all running process and sort them by their percentage of memory usage. My highest are snort and mysqld.
- 07-14-2010 #3Just Joined!
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Bellow is the data you wanted. I rebooted just 2 hours ago and it's already using almost 400 MB of RAM, with no user activity except mine.
Code:USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND mysql 3938 0.0 1.2 200028 25956 ? Sl 09:08 0:00 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/ root 4147 0.0 0.7 256928 15684 ? SN 09:08 0:00 /usr/bin/python -tt /usr/sbin/yum-updatesd apache 5710 0.0 0.6 278836 13668 ? S 10:15 0:00 /usr/sbin/httpd apache 4073 0.0 0.6 278848 13628 ? S 09:08 0:00 /usr/sbin/httpd apache 4067 0.0 0.6 278248 13160 ? S 09:08 0:00 /usr/sbin/httpd apache 4072 0.0 0.6 278212 13032 ? S 09:08 0:00 /usr/sbin/httpd apache 4066 0.0 0.6 277972 12840 ? S 09:08 0:00 /usr/sbin/httpd apache 4071 0.0 0.6 277804 12688 ? S 09:08 0:00 /usr/sbin/httpd apache 4069 0.0 0.6 277872 12652 ? S 09:08 0:00 /usr/sbin/httpd apache 4070 0.0 0.6 277852 12612 ? S 09:08 0:00 /usr/sbin/httpd root 4012 0.0 0.4 273260 10004 ? Ss 09:08 0:00 /usr/sbin/httpd apache 4068 0.0 0.3 273616 7300 ? S 09:08 0:00 /usr/sbin/httpd apache 5862 0.0 0.3 273460 6472 ? S 10:21 0:00 /usr/sbin/httpd named 2349 0.0 0.2 250604 4624 ? Ssl 09:08 0:00 /usr/sbin/named -u named -t /var/named/chroot 68 2570 0.0 0.1 30924 3980 ? Ss 09:08 0:01 hald root 6235 0.0 0.1 90124 3244 ? Ss 10:35 0:00 sshd: ****** [priv] root 6365 2.0 0.1 63968 2728 ? Ss 10:36 0:00 sshd: [accepted] root 6367 0.0 0.1 64860 2680 ? Ss 10:36 0:00 sshd: [accepted] root 3976 0.0 0.1 69008 2092 ? Ss 09:08 0:00 sendmail: accepting connections smmsp 3984 0.0 0.0 59760 1804 ? Ss 09:08 0:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue ******** 6245 0.0 0.0 90124 1736 ? S 10:35 0:00 sshd: ******@pts/0 root 6289 0.1 0.0 66092 1580 pts/0 S 10:35 0:00 -bash root 2636 0.0 0.0 119932 1520 ? Ssl 09:08 0:00 automount ******** 6246 0.0 0.0 66092 1488 pts/0 Ss 10:35 0:00 -bash root 6278 0.0 0.0 101084 1388 pts/0 S 10:35 0:00 su - root 2543 0.0 0.0 21172 1360 ? Ssl 09:08 0:00 pcscd sshd 6366 0.0 0.0 63968 1356 ? S 10:36 0:00 sshd: [net] sshd 6368 0.0 0.0 64860 1300 ? S 10:36 0:00 sshd: [net] avahi 4064 0.0 0.0 23272 1292 ? Ss 09:08 0:00 avahi-daemon: running [srv01.local] root 3897 0.0 0.0 65956 1268 ? S 09:08 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --socket=/var/lib/mysql/mysql.sock --lo root 3857 0.0 0.0 62624 1216 ? Ss 09:08 0:00 /usr/sbin/sshd root 4025 0.0 0.0 74836 1160 ? Ss 09:08 0:00 crond root 4149 0.0 0.0 12916 1152 ? SN 09:08 0:00 /usr/libexec/gam_server root 2571 0.0 0.0 21692 1044 ? S 09:08 0:00 hald-runner root 6369 0.0 0.0 65724 1000 pts/0 R+ 10:36 0:00 ps -aux --sort -rss dbus 2470 0.0 0.0 21256 976 ? Ss 09:08 0:00 dbus-daemon --system root 2424 0.0 0.0 14360 884 ? Ss 09:08 0:00 rpc.statd 68 2579 0.0 0.0 12324 844 ? S 09:08 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket root 2186 0.0 0.0 27324 808 ? S<sl 09:08 0:00 auditd root 537 0.0 0.0 12672 784 ? S<s 09:07 0:00 /sbin/udevd -d root 2483 0.0 0.0 10432 784 ? Ss 09:08 0:00 /usr/sbin/hcid root 2447 0.0 0.0 56072 776 ? Ss 09:08 0:00 rpc.idmapd root 2188 0.0 0.0 16264 744 ? S<sl 09:08 0:00 /sbin/audispd root 1 0.0 0.0 10348 692 ? Ss 09:07 0:00 init [3] root 2218 0.0 0.0 5908 612 ? Ss 09:08 0:00 syslogd -m 0 rpc 2379 0.0 0.0 8052 576 ? Ss 09:08 0:00 portmap root 2557 0.0 0.0 3800 576 ? Ss 09:08 0:00 /usr/sbin/acpid root 2489 0.0 0.0 5936 548 ? Ss 09:08 0:00 /usr/sbin/sdpd root 4090 0.0 0.0 3792 484 tty1 Ss+ 09:08 0:00 /sbin/mingetty tty1 root 4091 0.0 0.0 3792 484 tty2 Ss+ 09:08 0:00 /sbin/mingetty tty2 root 4092 0.0 0.0 3792 484 tty3 Ss+ 09:08 0:00 /sbin/mingetty tty3 root 4095 0.0 0.0 3792 484 tty5 Ss+ 09:08 0:00 /sbin/mingetty tty5 root 2609 0.0 0.0 8516 480 ? Ss 09:08 0:00 /usr/bin/hidd --server root 4093 0.0 0.0 3792 480 tty4 Ss+ 09:08 0:00 /sbin/mingetty tty4 root 4097 0.0 0.0 3792 480 tty6 Ss+ 09:08 0:00 /sbin/mingetty tty6 root 4038 0.0 0.0 18732 460 ? Ss 09:08 0:00 /usr/sbin/atd root 2221 0.0 0.0 3804 428 ? Ss 09:08 0:00 klogd -x root 2311 0.0 0.0 10760 372 ? Ss 09:08 0:00 irqbalance root 3998 0.0 0.0 6452 372 ? Ss 09:08 0:00 gpm -m /dev/input/mice -t exps2 avahi 4065 0.0 0.0 23148 340 ? Ss 09:08 0:00 avahi-daemon: chroot helper root 2 0.0 0.0 0 0 ? S< 09:07 0:00 [migration/0] root 3 0.0 0.0 0 0 ? SN 09:07 0:00 [ksoftirqd/0] root 4 0.0 0.0 0 0 ? S< 09:07 0:00 [watchdog/0] root 5 0.0 0.0 0 0 ? S< 09:07 0:00 [migration/1] root 6 0.0 0.0 0 0 ? SN 09:07 0:00 [ksoftirqd/1] root 7 0.0 0.0 0 0 ? S< 09:07 0:00 [watchdog/1] root 8 0.0 0.0 0 0 ? S< 09:07 0:00 [migration/2] root 9 0.0 0.0 0 0 ? SN 09:07 0:00 [ksoftirqd/2] root 10 0.0 0.0 0 0 ? S< 09:07 0:00 [watchdog/2] root 11 0.0 0.0 0 0 ? S< 09:07 0:00 [migration/3] root 12 0.0 0.0 0 0 ? SN 09:07 0:00 [ksoftirqd/3] root 13 0.0 0.0 0 0 ? S< 09:07 0:00 [watchdog/3] root 14 0.0 0.0 0 0 ? S< 09:07 0:00 [events/0] root 15 0.0 0.0 0 0 ? S< 09:07 0:00 [events/1] root 16 0.0 0.0 0 0 ? S< 09:07 0:00 [events/2] root 17 0.0 0.0 0 0 ? S< 09:07 0:00 [events/3] root 18 0.0 0.0 0 0 ? S< 09:07 0:00 [khelper] root 35 0.0 0.0 0 0 ? S< 09:07 0:00 [kthread] root 42 0.0 0.0 0 0 ? S< 09:07 0:00 [kblockd/0] root 43 0.0 0.0 0 0 ? S< 09:07 0:00 [kblockd/1] root 44 0.0 0.0 0 0 ? S< 09:07 0:00 [kblockd/2] root 45 0.0 0.0 0 0 ? S< 09:07 0:00 [kblockd/3] root 46 0.0 0.0 0 0 ? S< 09:07 0:00 [kacpid] root 137 0.0 0.0 0 0 ? S< 09:07 0:00 [cqueue/0] root 138 0.0 0.0 0 0 ? S< 09:07 0:00 [cqueue/1] root 139 0.0 0.0 0 0 ? S< 09:07 0:00 [cqueue/2] root 140 0.0 0.0 0 0 ? S< 09:07 0:00 [cqueue/3] root 143 0.0 0.0 0 0 ? S< 09:07 0:00 [khubd] root 145 0.0 0.0 0 0 ? S< 09:07 0:00 [kseriod] root 231 0.0 0.0 0 0 ? S 09:07 0:00 [khungtaskd] root 232 0.0 0.0 0 0 ? S 09:07 0:00 [pdflush] root 233 0.0 0.0 0 0 ? S 09:07 0:00 [pdflush] root 234 0.0 0.0 0 0 ? S< 09:07 0:00 [kswapd0] root 235 0.0 0.0 0 0 ? S< 09:07 0:00 [aio/0] root 236 0.0 0.0 0 0 ? S< 09:07 0:00 [aio/1] root 237 0.0 0.0 0 0 ? S< 09:07 0:00 [aio/2] root 238 0.0 0.0 0 0 ? S< 09:07 0:00 [aio/3] root 390 0.0 0.0 0 0 ? S< 09:07 0:00 [kpsmoused] root 436 0.0 0.0 0 0 ? S< 09:07 0:00 [ata/0] root 437 0.0 0.0 0 0 ? S< 09:07 0:00 [ata/1] root 438 0.0 0.0 0 0 ? S< 09:07 0:00 [ata/2] root 439 0.0 0.0 0 0 ? S< 09:07 0:00 [ata/3] root 440 0.0 0.0 0 0 ? S< 09:07 0:00 [ata_aux] root 446 0.0 0.0 0 0 ? S< 09:07 0:00 [scsi_eh_0] root 447 0.0 0.0 0 0 ? S< 09:07 0:00 [scsi_eh_1] root 458 0.0 0.0 0 0 ? S< 09:07 0:00 [kstriped] root 479 0.0 0.0 0 0 ? S< 09:07 0:00 [kjournald] root 504 0.0 0.0 0 0 ? S< 09:07 0:00 [kauditd] root 1320 0.0 0.0 0 0 ? S< 09:07 0:00 [hd-audio0] root 1577 0.0 0.0 0 0 ? S< 09:07 0:00 [kmpathd/0] root 1578 0.0 0.0 0 0 ? S< 09:07 0:00 [kmpathd/1] root 1579 0.0 0.0 0 0 ? S< 09:07 0:00 [kmpathd/2] root 1580 0.0 0.0 0 0 ? S< 09:07 0:00 [kmpathd/3] root 1581 0.0 0.0 0 0 ? S< 09:07 0:00 [kmpath_handlerd] root 1649 0.0 0.0 0 0 ? S< 09:07 0:00 [kjournald] root 2412 0.0 0.0 0 0 ? S< 09:08 0:00 [rpciod/0] root 2413 0.0 0.0 0 0 ? S< 09:08 0:00 [rpciod/1] root 2414 0.0 0.0 0 0 ? S< 09:08 0:00 [rpciod/2] root 2415 0.0 0.0 0 0 ? S< 09:08 0:00 [rpciod/3] root 2520 0.0 0.0 0 0 ? S< 09:08 0:00 [krfcommd]
- 07-15-2010 #4Linux Engineer
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A ps -A like above is not really helpful to determine the actual memory usage. 500mb for a server running webserver, database and lots of other stuff is not that much anyway. In the end most of the stuff will be cached in the swap. To determine which is really in memory and not cached, please post:
Code:# cat /proc/meminfo # free -m -o
- 07-15-2010 #5Just Joined!
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I'm expecting the memory usage to hover around 700 - 1200MB, but only once I put the server into production. Right now there's only some empty websites and a test DB configured on it and some test DNS zones. So I'm trying to figure out why memory usage climbs up to around 500MB in this kind of environment, if it's normal or not, and if I can do something about it before it goes public, otherwise I'll need more RAM.
Here is the data you requested:
Code:[root@srv01 ~]# cat /proc/meminfo MemTotal: 2049568 kB MemFree: 1654628 kB Buffers: 31028 kB Cached: 195840 kB SwapCached: 0 kB Active: 175368 kB Inactive: 158712 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 2049568 kB LowFree: 1654628 kB SwapTotal: 4192956 kB SwapFree: 4192956 kB Dirty: 56 kB Writeback: 0 kB AnonPages: 107300 kB Mapped: 17452 kB Slab: 27116 kB PageTables: 12136 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 5217740 kB Committed_AS: 436204 kB VmallocTotal: 34359738367 kB VmallocUsed: 265376 kB VmallocChunk: 34359472119 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 Hugepagesize: 2048 kB
Right now it's been up less than 15 hours.Code:[root@srv01 ~]# free -m -o total used free shared buffers cached Mem: 2001 385 1615 0 30 191 Swap: 4094 0 4094
The memory usage on the web server related processes seem fine to me, however there's lots of smaller processes I'm simply not familiar with, that I guess were installed by default by the OS or those who installed centos on my server at the datacenter. Not sure if all of them are required.
Thanks.
- 07-15-2010 #6Linux Engineer
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That doesn't look that bad. 385mb used from which 191mb are cached. swap is completely unused and you have 2gb ram / 4gb swap.
apache2: ~132mb
mysql: ~24mb
these both make up around 80% of the actual memory usage (used=385 - cached=191 = 194mb).
Can't see any trouble from my point of view. You have 2gb ram and 4gb swap which is not really huge, but should be enough for lot of things.
(EDIT) PS: I just thought of the used - cached thingy and I am right now unsure if this really holds. From my understanding the cached are pages that were read ahead from the disk to the memory for fasten access and must be subtracted from the used. But that could be already done for you in that meminfo thingy. Forgive and correct me if I am wrong.
Last edited by Kloschüssel; 07-15-2010 at 12:41 PM.
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