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Old 04-17-2005, 05:49 AM   #1
Fayte
LQ Newbie
 
Registered: Sep 2004
Posts: 5

Rep: Reputation: 0
free says 500mb memory used... ps aux says otherwise


Hi all. I noticed my server was running very, very slowly (SSH and Plesk both really slow) so I checked the list of processes, there was nothing with memory above 2%, most of it it 0.1%. Plesk is telling me that 98% of memory is being used, but I have added up everything from the "ps aux" command and it's nothing like that. But... the "free" command says I am using about 470mb of 500mb.

I rebooted and it's just the same. I really don't understand where all this memory usage is coming from. Here's my "ps aux" command

Code:
USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
root         1  0.5  0.0  1532  448 ?        S    20:28   0:04 init [3]
root         2  0.0  0.0     0    0 ?        SW   20:28   0:00 [migration/0]
root         3  0.0  0.0     0    0 ?        SW   20:28   0:00 [keventd]
root         4  0.0  0.0     0    0 ?        SW   20:28   0:00 [kapmd]
root         5  0.0  0.0     0    0 ?        SWN  20:28   0:00 [ksoftirqd/0]
root         8  0.0  0.0     0    0 ?        SW   20:28   0:00 [bdflush]
root         6  1.4  0.0     0    0 ?        SW   20:28   0:10 [kswapd]
root         7  0.3  0.0     0    0 ?        SW   20:28   0:02 [kscand]
root         9  0.0  0.0     0    0 ?        SW   20:28   0:00 [kupdated]
root        10  0.0  0.0     0    0 ?        SW   20:28   0:00 [mdrecoveryd]
root        14  0.1  0.0     0    0 ?        SW   20:28   0:01 [kjournald]
root        69  0.0  0.0     0    0 ?        SW   20:28   0:00 [khubd]
root       689  0.0  0.0     0    0 ?        SW   20:28   0:00 [kjournald]
root      1119  0.0  0.0     0    0 ?        SW   20:29   0:00 [eth0]
root      1163  0.1  0.1  1576  540 ?        S    20:29   0:00 syslogd -m 0
root      1167  0.0  0.0  1528  396 ?        S    20:29   0:00 klogd -x
root      1186  0.0  0.0  1580  380 ?        S    20:29   0:00 mdadm --monitor -
root      1201  0.0  0.0 83552  488 ?        S    20:29   0:00 /sbin/auditd
root      1281  0.0  0.2  7596 1132 ?        S    20:29   0:00 cupsd
named     1309  0.0  0.2 36160 1052 ?        S    20:29   0:00 /usr/sbin/named -
root      1322  0.0  0.1  3644  824 ?        S    20:29   0:00 /usr/sbin/sshd
root      1336  0.0  0.1  2132  744 ?        S    20:29   0:00 xinetd -stayalive
postgres  1387  0.0  0.3  9600 1532 ?        S    20:29   0:00 /usr/bin/postmast
postgres  1389  0.0  0.2  9160 1304 ?        S    20:29   0:00 postgres: stats b
postgres  1390  0.0  0.2  8168 1324 ?        S    20:29   0:00 postgres: stats c
root      1411  0.0  0.1  4240  516 ?        S    20:29   0:00 /bin/sh /usr/bin/
root      1445  0.0  0.1  3476  772 ?        S    20:29   0:00 /usr/lib/courier-
root      1450  0.0  0.1  3248  592 ?        S    20:29   0:00 /usr/lib/courier-
mysql     1452  0.2  0.6 106568 3460 ?       S    20:29   0:01 /usr/libexec/mysq
root      1461  0.0  0.1  3484  772 ?        S    20:29   0:00 /usr/lib/courier-
root      1464  0.0  0.1  3236  592 ?        S    20:29   0:00 /usr/lib/courier-
root      1471  0.0  0.1  3484  856 ?        S    20:29   0:00 /usr/lib/courier-
root      1473  0.0  0.1  3356  792 ?        S    20:29   0:00 /usr/lib/courier-
root      1482  0.0  0.1  3476  772 ?        S    20:29   0:00 /usr/lib/courier-
root      1486  0.0  0.1  3232  592 ?        S    20:29   0:00 /usr/lib/courier-
qmails    1493  0.5  0.1  1880  536 ?        S    20:29   0:03 qmail-send
qmaill    1495  0.0  0.0  1516  444 ?        S    20:29   0:00 splogger qmail
root      1496  0.0  0.0  1544  356 ?        S    20:29   0:00 qmail-lspawn ./Ma
qmailr    1497  0.0  0.0  1552  344 ?        S    20:29   0:00 qmail-rspawn
qmailq    1498  0.0  0.0  1512  304 ?        S    20:29   0:00 qmail-clean
root      1524  0.1  0.1 25408  612 ?        S    20:29   0:01 /usr/bin/spamd -d
tomcat4   1574  2.0  3.1 239208 16068 ?      S    20:29   0:13 /usr/java/j2sdk1.
popuser   1604  0.2  0.8 25296 4288 ?        S    20:29   0:01 /usr/bin/spamd --
popuser   1612  0.1  0.2 25292 1060 ?        S    20:29   0:01 /usr/bin/spamd --
root      1653  0.1  0.2 22852 1308 ?        S    20:29   0:00 /usr/sbin/httpd
root      1801  0.0  0.2 22796 1236 ?        S    20:30   0:00 /usr/sbin/httpd
apache    1802  0.0  1.7 28008 8796 ?        S    20:30   0:00 /usr/sbin/httpd
apache    1803  0.1  1.0 26076 5372 ?        S    20:30   0:00 /usr/sbin/httpd
apache    1804  0.1  0.9 26804 4896 ?        S    20:30   0:00 /usr/sbin/httpd
apache    1805  0.1  0.8 26344 4500 ?        S    20:30   0:00 /usr/sbin/httpd
apache    1806  0.0  1.0 27396 5164 ?        S    20:30   0:00 /usr/sbin/httpd
apache    1807  0.1  1.4 26344 7528 ?        S    20:30   0:01 /usr/sbin/httpd
apache    1808  0.1  1.9 28364 9900 ?        S    20:30   0:01 /usr/sbin/httpd
apache    1809  0.0  1.7 28012 8736 ?        S    20:30   0:00 /usr/sbin/httpd
root      1852  0.0  0.2 13016 1056 ?        S    20:30   0:00 /usr/local/psa/ad
psaadm    1856  0.1  1.2 15336 6332 ?        S    20:30   0:01 /usr/local/psa/ad
psaadm    1857  0.0  0.2 13148 1176 ?        S    20:30   0:00 /usr/local/psa/ad
psaadm    1858  0.1  0.4 14912 2040 ?        S    20:30   0:00 /usr/local/psa/ad
psaadm    1859  0.1  0.7 16000 3764 ?        S    20:30   0:01 /usr/local/psa/ad
psaadm    1860  0.3  0.2 15908 1224 ?        S    20:30   0:01 /usr/local/psa/ad
psaadm    1933  0.1  0.2 15584 1388 ?        S    20:30   0:01 /usr/local/psa/ad
drweb     1954  0.0  0.2 10872 1120 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1955  0.1  0.7 10888 3924 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1956  0.0  0.7 10888 3836 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1957  0.0  0.2 10872 1132 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1958  0.0  0.2 10872 1132 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1959  0.0  0.2 10872 1132 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1960  0.0  0.2 10872 1132 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1961  0.0  0.2 10872 1132 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1962  0.0  0.2 10872 1132 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1963  0.0  0.2 10872 1132 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1964  0.0  0.2 10872 1132 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1965  0.0  0.6 10888 3476 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1966  0.0  0.7 10888 3812 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1967  0.0  0.2 10888 1164 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1968  0.0  0.2 10888 1180 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1969  0.0  0.2 10888 1212 ?        S    20:30   0:00 /opt/drweb/drwebd
drweb     1970  0.0  0.2 10888 1168 ?        S    20:30   0:00 /opt/drweb/drwebd
root      1998  0.0  0.1  1600  588 ?        S    20:30   0:00 crond
xfs       2029  0.0  0.1  5348  528 ?        S    20:30   0:00 xfs -droppriv -da
root      2050  0.0  0.1  9832  948 ?        S    20:30   0:00 smbd -D
root      2055  0.0  0.1  9832  948 ?        S    20:30   0:00 smbd -D
root      2057  0.0  0.2  7648 1188 ?        S    20:30   0:00 nmbd -D
root      2069  0.0  0.0  3540  424 ?        S    20:30   0:00 rhnsd --interval
mailman   2102  0.0  0.1  7128  944 ?        S    20:30   0:00 /usr/bin/python /
mailman   2103  0.0  0.3  7236 1868 ?        S    20:30   0:00 /usr/bin/python /
mailman   2105  0.0  0.3  7204 1936 ?        S    20:30   0:00 /usr/bin/python /
mailman   2106  0.0  0.3  7188 1892 ?        S    20:30   0:00 /usr/bin/python /
mailman   2107  0.0  0.3  7240 1828 ?        S    20:30   0:00 /usr/bin/python /
mailman   2108  0.0  0.3  7272 1912 ?        S    20:30   0:00 /usr/bin/python /
mailman   2109  0.0  0.3  7344 1936 ?        S    20:30   0:00 /usr/bin/python /
mailman   2110  0.0  0.3  7236 1824 ?        S    20:30   0:00 /usr/bin/python /
mailman   2111  0.0  0.1  7240  940 ?        S    20:30   0:00 /usr/bin/python /
root      2119  0.0  0.0  1500  356 tty1     S    20:31   0:00 /sbin/mingetty tt
root      2120  0.0  0.0  1500  356 tty2     S    20:31   0:00 /sbin/mingetty tt
root      2121  0.0  0.0  1500  356 tty3     S    20:31   0:00 /sbin/mingetty tt
root      2122  0.0  0.0  1500  356 tty4     S    20:31   0:00 /sbin/mingetty tt
root      2123  0.0  0.0  1500  356 tty5     S    20:31   0:00 /sbin/mingetty tt
root      2124  0.0  0.0  1500  356 tty6     S    20:31   0:00 /sbin/mingetty tt
root      2125  0.0  0.0  1532  380 ttyS0    S    20:31   0:00 /sbin/agetty -L 9
psaadm    2283  0.0  0.1 13016  988 ?        S    20:32   0:00 /usr/local/psa/ad
root      2808  0.0  0.2  6856 1260 ?        S    20:33   0:00 sshd: root@pts/0
apache    2951  0.1  1.7 28016 8996 ?        S    20:33   0:00 /usr/sbin/httpd
apache    2958  0.1  1.5 27208 7980 ?        S    20:33   0:00 /usr/sbin/httpd
root      2986  0.0  0.2  4264 1016 pts/0    S    20:34   0:00 -bash
qmaild    3036  0.0  0.1  3272  808 ?        S    20:34   0:00 /var/qmail/bin/qm
qmaild    3262  0.0  0.1  3260  800 ?        S    20:34   0:00 /var/qmail/bin/qm
qmaild    3315  0.0  0.1  3280  784 ?        S    20:35   0:00 /var/qmail/bin/qm
popuser   4363  0.0  0.0  1412  272 ?        S    20:39   0:00 bin/qmail-local -
popuser   4365  0.0  0.2  4240 1076 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4367  0.0  0.0  1424  272 ?        S    20:39   0:00 bin/qmail-local -
popuser   4369  0.0  0.0  1420  272 ?        S    20:39   0:00 bin/qmail-local -
popuser   4370  0.0  0.2  4248 1080 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4374  0.0  0.0  1408  272 ?        S    20:39   0:00 bin/qmail-local -
popuser   4381  0.0  0.2  4240 1076 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4385  0.1  0.1  4244  896 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4388  0.0  0.0  1436  272 ?        S    20:39   0:00 bin/qmail-local -
popuser   4389  0.0  0.0  1416  268 ?        S    20:39   0:00 bin/qmail-local -
popuser   4390  0.0  0.2  4244 1080 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4393  0.0  0.0  1424  272 ?        S    20:39   0:00 bin/qmail-local -
popuser   4394  0.0  0.2  4248 1080 ?        S    20:39   0:00 /bin/sh -c  if [
root      4396  0.0  0.0  1600  464 ?        S    20:39   0:00 tcp-env /var/qmai
popuser   4397  0.0  0.2  4260 1080 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4404  0.0  0.0  1424  272 ?        S    20:39   0:00 bin/qmail-local -
popuser   4407  0.0  0.2  4252 1076 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4414  0.0  0.0  1420  268 ?        S    20:39   0:00 bin/qmail-local -
popuser   4415  0.0  0.2  4244 1076 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4439  0.0  0.0  1432  268 ?        S    20:39   0:00 bin/qmail-local -
popuser   4441  0.0  0.2  4252 1080 ?        S    20:39   0:00 /bin/sh -c  if [
popuser   4459  0.0  0.0  1416  276 ?        S    20:39   0:00 /var/qmail/bin/qm
popuser   4462  0.2  0.0  1552  352 ?        D    20:39   0:00 /var/qmail/bin/qm
popuser   4477  0.0  0.0  1436  312 ?        S    20:39   0:00 /var/qmail/bin/qm
popuser   4480  4.9  0.0  1572  380 ?        D    20:39   0:00 /var/qmail/bin/qm
popuser   4482  0.0  0.0  1428  312 ?        S    20:39   0:00 /var/qmail/bin/qm
popuser   4485  0.4  0.0  1564  380 ?        D    20:39   0:00 /var/qmail/bin/qm
popuser   4493  0.0  0.0  1416  308 ?        S    20:39   0:00 /var/qmail/bin/qm
popuser   4496  0.2  0.0  1552  376 ?        D    20:39   0:00 /var/qmail/bin/qm
popuser   4497  0.0  0.0  1420  312 ?        S    20:40   0:00 /var/qmail/bin/qm
popuser   4500  0.2  0.0  1556  380 ?        D    20:40   0:00 /var/qmail/bin/qm
root      4501  0.0  0.1  1600  596 ?        S    20:40   0:00 CROND
mailman   4503  3.5  0.9  7040 4596 ?        D    20:40   0:00 /usr/bin/python -
popuser   4505  0.0  0.0  1416  308 ?        S    20:40   0:00 /var/qmail/bin/qm
popuser   4508  0.2  0.0  1552  376 ?        D    20:40   0:00 /var/qmail/bin/qm
popuser   4509  0.0  0.0  1420  312 ?        S    20:40   0:00 /var/qmail/bin/qm
popuser   4512  0.0  0.0  1556  380 ?        D    20:40   0:00 /var/qmail/bin/qm
popuser   4513  0.1  0.0  1432  312 ?        S    20:40   0:00 /var/qmail/bin/qm
popuser   4516  0.0  0.0  1568  380 ?        D    20:40   0:00 /var/qmail/bin/qm
popuser   4517  0.0  0.0  1416  312 ?        S    20:40   0:00 /var/qmail/bin/qm
popuser   4520  0.0  0.0  1552  380 ?        D    20:40   0:00 /var/qmail/bin/qm
popuser   4521  0.1  0.0  1424  312 ?        S    20:40   0:00 /var/qmail/bin/qm
popuser   4524  0.1  0.0  1560  380 ?        D    20:40   0:00 /var/qmail/bin/qm
root      4559  0.0  0.1  2872  888 pts/0    R    20:40   0:00 ps aux
And here's "free"

Code:
             total       used       free     shared    buffers     cached
Mem:        502292     481636      20656          0      43792      23744
-/+ buffers/cache:     414100      88192
Swap:      2048276     196552    1851724
And Plesk says 93-98% of memory is being used.

This is really confusing Please advise, as you can see there are no processes which are using lots of memory...

Last edited by Fayte; 04-17-2005 at 07:55 AM.
 
Old 04-17-2005, 06:47 AM   #2
MasterC
LQ Guru
 
Registered: Mar 2002
Location: Salt Lake City, UT - USA
Distribution: Gentoo ; LFS ; Kubuntu
Posts: 12,612

Rep: Reputation: 68
What does top show?

If you can, you might consider using my-small.cnf as your template mysql.cnf file to see if that subsides the problem, if you aren't already

The format on that ps aux is hard to follow, you might want to try using the [ code ] brackets.

Cool
 
Old 04-17-2005, 07:56 AM   #3
Fayte
LQ Newbie
 
Registered: Sep 2004
Posts: 5

Original Poster
Rep: Reputation: 0
Top shows:

Code:
 23:15:20  up  2:46,  1 user,  load average: 11.80, 11.45, 11.19
205 processes: 198 sleeping, 5 running, 2 zombie, 0 stopped
CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
           total    8.4%    0.0%   55.3%   1.6%     0.0%   34.5%    0.0%
Mem:   502292k av,  471680k used,   30612k free,       0k shrd,   43664k buff
                    149324k actv,   22312k in_d,    6452k in_c
Swap: 2048276k av,  289008k used, 1759268k free                   24012k cached
For every process listed it says 0.0% MEM is being used.

I did the code thing, and how do I do that mySQL fix?

Last edited by Fayte; 04-17-2005 at 08:18 AM.
 
Old 04-18-2005, 02:09 AM   #4
Fayte
LQ Newbie
 
Registered: Sep 2004
Posts: 5

Original Poster
Rep: Reputation: 0
Please can someone help, this is a bad situation, everything is running really slow and I need to get it sorted
 
Old 04-18-2005, 10:09 AM   #5
Fayte
LQ Newbie
 
Registered: Sep 2004
Posts: 5

Original Poster
Rep: Reputation: 0
Bump again... I tried stopping mySQL altogether and nothing... I just don't get it
 
Old 04-25-2005, 05:47 AM   #6
MasterC
LQ Guru
 
Registered: Mar 2002
Location: Salt Lake City, UT - USA
Distribution: Gentoo ; LFS ; Kubuntu
Posts: 12,612

Rep: Reputation: 68
If MySQL isn't running and the problem still exists, then using a my-small.cnf won't do a thing, so don't worry about that (however, just a quick note, it's basically a settings file that adjusts the amount of memory use for smaller/larger systems and generally comes with the source distributions for ease of quick deployment).

So, to shorten your search a bit, I'd venture a guess that it's not lack of RAM that is slowing your system down, maybe HD read/writes, but likely not RAM. Linux utilizes RAM extremely efficiently by actually using it where it's needed, not only WHEN, but where. So, if all your RAM is being 'used' this is a good thing, you didn't pay all that money for nothing

If it's possible, try swapping in a second HD and RAID the 2, or move your mail processes to another machine to see if the speed returns.

But my guess, it's not a RAM issue, but that is odd that they are reporting 2 different results; possibly they are pulling their info from 2 different sources.

Cool
 
  


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