I am running a Java script on a Fedora Core Release 6 server (Linux 2.6.19-1.2911.6.5.fc6xen x86_64) and am concerned about a lack of memory. The box has 2 GB of memory in total. Running "free -tm" displays the following:
free -tm
total used free shared buffers cached
Mem: 2048 956 1091 0 115 611
-/+ buffers/cache: 229 1818
Swap: 543 0 543
Total: 2591 956 1635
It seems as though around half of the memory is currently being used. When I run the command "ps aux" and "top" though, I cannot seem to find a process or combination of processes that are using the memory. Here are the results from "top":
5473 root 15 0 63236 19m 2036 S 0 0.9 0:00.33 getAp_StrangeNe
1395 root 18 0 214m 9080 5276 S 0 0.4 0:00.18 httpd
21088 apache 15 0 217m 7160 2944 S 0 0.3 0:00.14 httpd
21081 apache 15 0 217m 7128 2952 S 0 0.3 0:00.01 httpd
21085 apache 15 0 217m 7040 2916 S 0 0.3 0:00.01 httpd
21087 apache 15 0 217m 7040 2916 S 0 0.3 0:00.00 httpd
21082 apache 15 0 217m 6492 2524 S 0 0.3 0:00.00 httpd
21084 apache 15 0 217m 6472 2512 S 0 0.3 0:00.00 httpd
26700 root 18 0 144m 6320 3952 S 0 0.3 0:03.89 php
21086 apache 15 0 216m 5652 1800 S 0 0.3 0:00.00 httpd
21083 apache 18 0 216m 5648 1800 S 0 0.3 0:00.00 httpd
4380 root 15 0 73916 2936 2292 R 0 0.1 0:00.00 sshd
4042 root 15 0 73916 2928 2292 S 0 0.1 0:00.01 sshd
5582 postfix 16 0 47572 2508 1984 S 0 0.1 0:00.00 local
5579 postfix 16 0 49700 2324 1804 S 0 0.1 0:00.00 cleanup
1495 postfix 15 0 49628 2288 1768 S 0 0.1 0:01.73 qmgr
4601 postfix 15 0 49568 2200 1700 S 0 0.1 0:00.00 pickup
1492 root 15 0 47412 2104 1616 S 0 0.1 0:03.48 master
10654 root 15 0 74272 1684 596 S 0 0.1 0:00.08 screen
10655 root 15 0 65308 1676 1212 S 0 0.1 0:00.05 bash
4044 root 15 0 65184 1596 1172 S 0 0.1 0:00.00 bash
4382 root 15 0 65184 1596 1168 S 0 0.1 0:00.01 bash
5460 root 18 0 100m 1588 836 S 0 0.1 0:00.00 crond
1384 ntp 15 0 19760 1296 1024 S 0 0.1 0:00.28 ntpd
1405 root 19 0 73916 1204 552 S 0 0.1 1:50.10 crond
5584 root 16 0 16940 1196 892 S 0 0.1 0:00.05 top
1350 root 25 0 26828 1188 904 S 0 0.1 0:00.95 automount
5978 root 15 0 16804 1164 892 R 0 0.1 0:00.00 top
28831 root 15 0 44284 1072 628 S 0 0.1 0:00.10 sshd
1497 42949672 15 0 35348 1068 720 S 0 0.1 0:01.51 nrpe
5472 root 19 0 8644 940 800 S 0 0.0 0:00.00 sh
26557 root 15 0 31096 884 520 S 0 0.0 0:01.71 ssh-agent
1149 root 18 0 10104 788 648 S 0 0.0 0:00.00 rpc.statd
1181 root 18 0 42000 744 328 S 0 0.0 0:00.06 rpc.idmapd
325 root 15 -4 12560 684 364 S 0 0.0 0:00.01 udevd
1 root 15 0 10308 680 568 S 0 0.0 0:00.46 init
1129 rpc 15 0 8004 608 452 S 0 0.0 0:20.77 portmap
1103 root 15 0 5864 604 484 S 0 0.0 0:11.41 syslogd
1499 root 15 0 3760 512 440 S 0 0.0 0:00.00 agetty
1424 root 18 0 18668 464 308 S 0 0.0 0:00.00 atd
1106 root 15 0 3760 440 360 S 0 0.0 0:00.00 klogd
1199 dbus 25 0 25452 432 216 S 0 0.0 0:00.00 dbus-daemon
1117 root 18 0 6436 328 240 S 0 0.0 0:00.66 irqbalance
2 root RT 0 0 0 0 S 0 0.0 0:00.61 migration/0
3 root 34 19 0 0 0 S 0 0.0 0:00.20 ksoftirqd/0
4 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/0
5 root 10 -5 0 0 0 S 0 0.0 0:00.70 events/0
6 root 10 -5 0 0 0 S 0 0.0 0:00.00 khelper
7 root 10 -5 0 0 0 S 0 0.0 0:00.00 kthread
9 root 10 -5 0 0 0 S 0 0.0 0:00.00 xenwatch
10 root 10 -5 0 0 0 S 0 0.0 0:00.00 xenbus
15 root RT -5 0 0 0 S 0 0.0 0:00.66 migration/1
16 root 34 19 0 0 0 S 0 0.0 0:00.26 ksoftirqd/1
17 root RT -5 0 0 0 S 0 0.0 0:00.00 watchdog/1
18 root 10 -5 0 0 0 S 0 0.0 0:00.98 events/1
58 root 10 -5 0 0 0 S 0 0.0 0:00.00 kblockd/0
59 root 10 -5 0 0 0 S 0 0.0 0:00.00 kblockd/1
60 root 20 -5 0 0 0 S 0 0.0 0:00.00 cqueue/0
61 root 10 -5 0 0 0 S 0 0.0 0:00.00 cqueue/1
63 root 20 -5 0 0 0 S 0 0.0 0:00.00 ksuspend_usbd
66 root 20 -5 0 0 0 S 0 0.0 0:00.00 khubd
68 root 10 -5 0 0 0 S 0 0.0 0:00.00 kseriod
99 root 10 -5 0 0 0 S 0 0.0 0:00.70 kswapd0
100 root 20 -5 0 0 0 S 0 0.0 0:00.00 aio/0
101 root 20 -5 0 0 0 S 0 0.0 0:00.00 aio/1
234 root 11 -5 0 0 0 S 0 0.0 0:00.00 kpsmoused
262 root 18 -5 0 0 0 S 0 0.0 0:00.00 kmirrord
269 root 20 -5 0 0 0 S 0 0.0 0:00.00 ksnapd
272 root 10 -5 0 0 0 S 0 0.0 0:25.29 kjournald
296 root 11 -5 0 0 0 S 0 0.0 0:00.00 kauditd
700 root 14 -5 0 0 0 S 0 0.0 0:00.00 kmpathd/0
701 root 14 -5 0 0 0 S 0 0.0 0:00.00 kmpathd/1
725 root 12 -5 0 0 0 S 0 0.0 0:00.00 kjournald
1230 root 10 -5 0 0 0 S 0 0.0 0:02.87 rpciod/0
1231 root 10 -5 0 0 0 S 0 0.0 0:00.00 rpciod/1
1232 root 19 0 0 0 0 S 0 0.0 0:00.00 lockd
2405 root 15 0 0 0 0 S 0 0.0 0:00.31 pdflush
28522 root 15 0 0 0 0 S 0 0.0 0:00.00 pdflush
I don't know a thing about memory management on any operating system, so am unsure if the commands I am using are even fulfilling what information I need. Any suggestions as to what might be happening? Am I misinterpreting what I am being presented?
