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cent os memory usage high

uk01
Hi, I've just set up another vps on ESXi. This uses cent os 6.5 and was set up using the cpanel iso download. It's currently using trial license and all is well. However, the server info reports 0.2% cpu usage (no accounts at the moment) 86% memory usage - 2Gb installed (and a warning) 86%! Our other vps's running a large amount of busy websites, Wordpress etc use much less, usually around 40-50%. The only difference is they use Cent os 5.1 Does cent os 6.5 use all the memory for cache even if there are no accounts? My concern is that ESxi usually shares memory with other vps's and now 1 empty vps is hogging 2GB for nothing. Unless I missing something?

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8 comments

Date Votes
  • cPanelMichael
    Hello :) The following thread might be helpful to you: Memory usage apparently higher than expected Thank you.
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  • uk01
    [quote="cPanelMichael, post: 1712322">Hello :) The following thread might be helpful to you: Memory usage apparently higher than expected Thank you.
    Thanks, I've just had a read of that and understand it. However, it seems I'm seeing the opposite because he has 22% of memory used in the system information, whereas I'm seeing 85% with nothing on the server. System information Server load 0.10 (1 CPU) Memory Used 84.88% (1,631,756 of 1,922,424) Swap Used 0.58% (23,932 of 4,128,760) Current Memory Usage total used free shared buffers cached Mem: 1922424 1833120 89304 0 17208 187092 -/+ buffers/cache: 1628820 293604 Swap: 4128760 23932 4104828 Total: 6051184 1857052 4194132 I'd appreciate if you could clarify the above figures? Also is it just Centos6 which uses caching, is that why our other servers don't use this much ram? Thanks
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  • triantech
    Hello, It would be good if you check what actually are the running process. Run # top -c ( and press shift+m) - to find the memory usage along with the running processes.
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  • uk01
    thanks triantech, here are the results of that, minimal memory use by processes but high amount used in the stats top - 12:58:36 up 1 day, 11:29, 1 user, load average: 0.00, 0.05, 0.01 Tasks: 124 total, 1 running, 123 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1922424k total, 1812584k used, 109840k free, 17712k buffers Swap: 4128760k total, 69832k used, 4058928k free, 237708k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1663 mysql 20 0 863m 44m 3768 S 0.0 2.4 1:00.07 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugi 23344 root 20 0 162m 35m 2040 S 0.0 1.9 0:03.66 spamd child 1731 root 20 0 161m 19m 1852 S 0.0 1.1 0:24.43 /usr/local/cpanel/3rdparty/perl/514/bin/spamd -d --allowed-ips=1 1892 root 20 0 112m 19m 1204 S 0.0 1.0 0:13.31 cpsrvd (SSL) - waiting for c --llu=1408494599 --listen=3,4,5,6,7 1916 root 20 0 103m 15m 668 S 0.0 0.9 0:03.08 cpdavd - accepting connections on 2077 and 2078 1984 root 20 0 83636 13m 1224 S 0.0 0.7 0:25.66 tailwatchd 26507 root 20 0 150m 13m 1384 S 0.0 0.7 0:00.51 lfd - sleeping 1949 root 20 0 38844 6936 1412 S 0.0 0.4 0:04.53 queueprocd - wait to process a task 1996 root 38 18 31020 4896 764 S 0.0 0.3 0:01.07 cpanellogd - sleeping for logs 26623 root 20 0 100m 3984 2992 S 0.0 0.2 0:00.19 sshd: root@pts/0 26523 root 20 0 100m 3936 2964 S 0.0 0.2 0:00.27 sshd: root@notty 1877 root 20 0 34936 2940 1348 S 0.0 0.2 0:01.03 cPhulkd - processor 16359 nobody 20 0 73728 2592 1872 S 0.0 0.1 0:00.10 /usr/local/apache/bin/httpd -k start -DSSL 16362 nobody 20 0 73728 2588 1872 S 0.0 0.1 0:00.05 /usr/local/apache/bin/httpd -k start -DSSL 16374 nobody 20 0 73728 2584 1872 S 0.0 0.1 0:00.04 /usr/local/apache/bin/httpd -k start -DSSL 16361 nobody 20 0 73728 2580 1872 S 0.0 0.1 0:00.06 /usr/local/apache/bin/httpd -k start -DSSL 16367 nobody 20 0 73728 2576 1872 S 0.0 0.1 0:00.05 /usr/local/apache/bin/httpd -k start -DSSL 16370 nobody 20 0 73728 2576 1872 S 0.0 0.1 0:00.07 /usr/local/apache/bin/httpd -k start -DSSL 16372 nobody 20 0 73728 2576 1872 S 0.0 0.1 0:00.05 /usr/local/apache/bin/httpd -k start -DSSL 16368 nobody 20 0 73728 2572 1872 S 0.0 0.1 0:00.04 /usr/local/apache/bin/httpd -k start -DSSL 16369 nobody 20 0 73728 2572 1872 S 0.0 0.1 0:00.04 /usr/local/apache/bin/httpd -k start -DSSL 16371 nobody 20 0 73728 2572 1872 S 0.0 0.1 0:00.05 /usr/local/apache/bin/httpd -k start -DSSL 26542 root 20 0 57688 2212 1596 S 0.0 0.1 0:00.03 /usr/libexec/openssh/sftp-server 2058 root 18 -2 12312 2044 304 S 0.0 0.1 0:00.00 /sbin/udevd -d 2057 root 18 -2 12312 1960 304 S 0.0 0.1 0:00.01 /sbin/udevd -d 1801 root 20 0 79716 1896 1892 S 0.0 0.1 0:00.17 /usr/local/cpanel/3rdparty/bin/perl /usr/local/cpanel/bin/leechp 26645 root 20 0 105m 1680 1360 S 0.0 0.1 0:00.03 /bin/bash 1708 dovenull 20 0 42368 1608 1336 S 0.0 0.1 0:00.69 dovecot/pop3-login 1703 dovenull 20 0 42392 1552 1320 S 0.0 0.1 0:00.13 dovecot/pop3-login 1453 haldaemo 20 0 37952 1504 928 S 0.0 0.1 0:01.31 hald 1710 root 20 0 16432 1444 872 S 0.0 0.1 0:00.25 dovecot/config 1772 root 20 0 73592 1320 872 S 0.0 0.1 0:06.27 /usr/local/apache/bin/httpd -k start -DSSL 1196 root 20 0 243m 1260 768 S 0.0 0.1 0:03.46 /sbin/rsyslogd -i /var/run/syslogd.pid -c 5 26734 root 20 0 15036 1244 940 R 0.0 0.1 0:00.17 top -c 1525 ntp 20 0 30720 1164 932 S 0.0 0.1 0:01.41 ntpd -u ntp:ntp -p /var/run/ntpd.pid -g 1704 dovenull 20 0 42380 1160 988 S 0.0 0.1 0:00.36 dovecot/imap-login 1715 dovecot 20 0 29464 1152 960 S 0.0 0.1 0:01.46 dovecot/auth 1 root 20 0 19356 1072 844 S 0.0 0.1 0:07.67 /sbin/init 1697 root 20 0 19612 840 692 S 0.0 0.0 0:01.17 /usr/sbin/dovecot 1706 root 20 0 13444 824 660 S 0.0 0.0 0:00.41 dovecot/log 1789 root 20 0 114m 808 652 S 0.0 0.0 0:05.35 crond 1717 mailnull 20 0 70100 732 600 S 0.0 0.0 0:01.13 /usr/sbin/exim -bd -q1h 1705 dovecot 20 0 13316 724 624 S 0.0 0.0 0:00.08 dovecot/anvil 1428 dbus 20 0 31776 668 464 S 0.0 0.0 0:00.49 dbus-daemon --system 1147 root 16 -4 93176 660 508 S 0.0 0.0 0:00.86 auditd 1536 root 20 0 105m 656 648 S 0.0 0.0 0:00.04 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file 1500 haldaemo 20 0 17936 648 644 S 0.0 0.0 0:00.00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket 1709 dovenull 20 0 42236 640 636 S 0.0 0.0 0:00.00 dovecot/imap-login 1454 root 20 0 20328 632 628 S 0.0 0.0 0:00.01 hald-runner 1761 root 20 0 105m 632 560 S 0.0 0.0 0:02.18 abrt-dump-oops -d /var/spool/abrt -rwx /var/log/messages 1753 root 20 0 107m 604 600 S 0.0 0.0 0:00.00 /usr/sbin/abrtd 1486 root 20 0 22448 576 572 S 0.0 0.0 0:00.00 hald-addon-input: Listening on /dev/input/event2 /dev/input/even 1781 root 20 0 133m 560 556 S 0.0 0.0 0:00.00 /usr/sbin/pure-authd -s /var/run/ftpd.sock -r /usr/local/cpanel/ 1779 root 20 0 135m 556 468 S 0.0 0.0 0:00.30 pure-ftpd (SERVER) 1517 root 20 0 66616 532 428 S 0.0 0.0 0:00.14 /usr/sbin/sshd 2050 root 20 0 4064 496 424 S 0.0 0.0 0:00.00 /sbin/mingetty /dev/tty1 2052 root 20 0 4064 496 424 S 0.0 0.0 0:00.00 /sbin/mingetty /dev/tty2 2061 root 20 0 4064 496 424 S 0.0 0.0 0:00.00 /sbin/mingetty /dev/tty5 2063 root 20 0 4064 496 424 S 0.0 0.0 0:00.00 /sbin/mingetty /dev/tty6 2054 root 20 0 4064 492 424 S 0.0 0.0 0:00.00 /sbin/mingetty /dev/tty3 2059 root 20 0 4064 492 424 S 0.0 0.0 0:00.00 /sbin/mingetty /dev/tty4 1808 root 20 0 21540 452 360 S 0.0 0.0 0:00.13 /usr/sbin/atd 1385 root 20 0 13584 444 376 S 0.0 0.0 0:08.62 lldpad -d 1444 root 20 0 4080 432 428 S 0.0 0.0 0:00.01 /usr/sbin/acpid 438 root 16 -4 11392 372 248 S 0.0 0.0 0:00.41 /sbin/udevd -d 1416 root 20 0 8364 304 276 S 0.0 0.0 0:01.91 /usr/sbin/fcoemon --syslog 2 root 20 0 0 0 0 S 0.0 0.0 0:00.07 [kthreadd] 3 root RT 0 0 0 0 S 0.0 0.0 0:00.00 [migration/0] 4 root 20 0 0 0 0 S 0.0 0.0 0:00.41 [ksoftirqd/0]
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  • triantech
    Hello, Very weird it looks :( Just curious to know, what version of MySQL are you running on ?
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  • uk01
    [quote="triantech, post: 1713452">Hello, Very weird it looks :( Just curious to know, what version of MySQL are you running on ?
    Currently installed: 5.5.37 Centos and cpanel installed from the cpanel download It is trial at the moment and shows accelerated version of cpanel but that's just an image issue with the logo, it changes to vps optimised when licensed, still the same install. Odd as when we restart the server it's on a low memory usage then goes up and up quickly and sits at 85% so it does look like caching in cent os6 but from the figures it's odd. It's also not good for ESXi as I'm not sure if it can still reclaim unused memory for other vps's (usually they don't need the 2GB especially with no accounts!)
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  • uk01
    Just to update this thread after liasing with Cpanel support. We couldn't find anything wrong and after setting up a test server Cpanel saw something similar but confirmed it was not Cpanel related. However after a couple of restarts the issue seemed to resolve. The only setting I changed was to disable the vmwaretools CD installer loading on the vm in esxi/vsphere (perhaps a driver for this caused high memory usage, I don't know.) I also ran yum update. Memory dropped to around 20% and remained consistent, so I then went ahead and did the vmware tools install. Everything is still fine. One thing which did come out of this is that Cpanel recommend that SELinux is turned off
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  • cPanelMichael
    I am happy to see the issue is no longer occurring. Thank you taking the time to update this thread with the outcome.
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