|
TOP command details
Here is my Issue:
By using the 'top' command, I monitor the memory usage on our Linux box. We have several heavy Java processes running. I take output of 'top' command (in a file) when server is healthy and after server memory usage gets very high (and eventually start to cause application issues) I try to compare the results of the 'top' command output when server is healthy and unhealthy: -the top part of the 'top' command output shows low memory free when system unhealthy (as expected) -But the details of the 'top' command showing all the processes show almost similar details compared to 'top' output when system is healthy. How can I know which process is filling up Memory usage? I would like to know if there is a way to calculate the 'Mem' field details from by summing up the process details 'VIRT', 'RES' or other fields Mem: 8164332k total, 3127924k used, 5036408k free, 473808k buffers When I get the output of the 'top' command to a file then import into Excel and add up all VIRT column, they don't match the total of Memory used. Samir |
You might get more details with this.
Either you have a package for your distro/arch or compile yourself (there is a link to the targz on the webpage above) memstat -w |
Is there another utility or script available that does not require compile and root access. I am surprised there is no out of box tools to show which process are consuming all the memory (cache or no cache)
|
Finding cluprit process
I am posting below the full output of 'top' command first when system was unhealthy (memory used almost 95%) and when system was started up after a reboot (healthy). Applications running are mainly Java based (but there might be other monitoring or utilities also). Even when we killed '-9' Java processes, memory used did not clear up (memory used was just above 8GB and after killing all java processes, it went down to 7GB. What was taking 7 GB?!!). Which process(es) is the bad one?
'top' command output when system is 'unhealthy': ==== top - 20:16:29 up 22:04, 5 users, load average: 0.06, 0.08, 0.05 Tasks: 144 total, 1 running, 143 sleeping, 0 stopped, 0 zombie Cpu(s): 1.8% us, 0.2% sy, 0.0% ni, 97.6% id, 0.4% wa, 0.0% hi, 0.1% si Mem: 8164332k total, 8059596k used, 104736k free, 338772k buffers Swap: 16777208k total, 0k used, 16777208k free, 5736756k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 18484 www 15 0 6144 952 696 R 4 0.0 0:00.02 top 1 root 16 0 4752 556 460 S 0 0.0 0:01.92 init 2 root RT 0 0 0 0 S 0 0.0 0:00.03 migration/0 3 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/0 4 root RT 0 0 0 0 S 0 0.0 0:00.04 migration/1 5 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/1 6 root RT 0 0 0 0 S 0 0.0 0:00.03 migration/2 7 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/2 8 root RT 0 0 0 0 S 0 0.0 0:00.01 migration/3 9 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/3 10 root 5 -10 0 0 0 S 0 0.0 0:00.05 events/0 .. 13 root 5 -10 0 0 0 S 0 0.0 0:00.03 events/3 14 root 5 -10 0 0 0 S 0 0.0 0:00.00 khelper 15 root 15 -10 0 0 0 S 0 0.0 0:00.00 kacpid 70 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/0 71 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/1 72 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/2 73 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/3 74 root 15 0 0 0 0 S 0 0.0 0:00.12 khubd 101 root 20 0 0 0 0 S 0 0.0 0:00.00 pdflush 102 root 15 0 0 0 0 S 0 0.0 0:01.19 pdflush 105 root 12 -10 0 0 0 S 0 0.0 0:00.00 aio/0 103 root 15 0 0 0 0 S 0 0.0 0:00.13 kswapd1 104 root 15 0 0 0 0 S 0 0.0 0:00.31 kswapd0 .. 252 root 23 0 0 0 0 S 0 0.0 0:00.00 kseriod 400 root 8 -10 0 0 0 S 0 0.0 0:00.00 kmirrord 423 root 15 0 0 0 0 S 0 0.0 0:00.45 kjournald 1692 root 6 -10 3604 448 364 S 0 0.0 0:00.01 udevd 2335 root 6 -10 0 0 0 S 0 0.0 0:00.00 kauditd 2473 root 15 0 0 0 0 S 0 0.0 0:00.00 emcpd 2474 root 15 0 0 0 0 S 0 0.0 0:00.00 emcpdefd 2475 root 19 0 0 0 0 S 0 0.0 0:00.00 emcprequestd 2648 root 19 0 0 0 0 S 0 0.0 0:00.00 MpxAsyncIoDaemo 2649 root 19 0 0 0 0 S 0 0.0 0:00.00 MpxResumeIoDaem 2650 root 15 0 0 0 0 S 0 0.0 0:00.00 MpxPeriodicCall 2651 root 19 0 0 0 0 S 0 0.0 0:00.00 MpxGrDaemon 2652 root 19 0 0 0 0 S 0 0.0 0:00.00 MpxProactiveDae 2653 root 19 0 0 0 0 S 0 0.0 0:00.00 MpxDispatchDaem 2654 root 19 0 0 0 0 S 0 0.0 0:00.00 MpxTestDaemon 2727 root 5 -10 0 0 0 S 0 0.0 0:00.00 kmpathd/0 .. 2758 root 15 0 0 0 0 S 0 0.0 0:00.04 kjournald .. 2761 root 15 0 0 0 0 S 0 0.0 0:00.26 kjournald 2762 root 15 0 0 0 0 S 0 0.0 0:00.01 kjournald 2763 root 15 0 0 0 0 S 0 0.0 0:00.22 kjournald 2764 root 15 0 0 0 0 S 0 0.0 0:01.97 kjournald 2765 root 15 0 0 0 0 S 0 0.0 0:02.34 kjournald 3151 root 15 0 2528 276 208 S 0 0.0 0:01.10 cpuspeed 3152 root 15 0 2528 272 204 S 0 0.0 0:00.01 cpuspeed 3153 root 15 0 2528 272 204 S 0 0.0 0:00.02 cpuspeed 3155 root 15 0 2528 272 204 S 0 0.0 0:00.25 cpuspeed 3469 root 16 0 3628 608 496 S 0 0.0 0:00.34 syslogd 3473 root 16 0 2536 376 300 S 0 0.0 0:00.00 klogd 3484 root 16 0 2548 304 204 S 0 0.0 0:00.10 irqbalance 3496 rpc 15 0 4748 576 456 S 0 0.0 0:00.00 portmap 3516 root 17 0 5800 748 624 S 0 0.0 0:00.00 rpc.statd 3548 root 16 0 20916 392 188 S 0 0.0 0:00.00 rpc.idmapd 3733 root 18 0 2540 448 360 S 0 0.0 0:00.00 acpid 3747 root 16 0 6092 1876 532 S 0 0.0 0:00.00 perl 3757 root 16 0 71116 2036 1484 S 0 0.0 0:00.00 cupsd 3794 root 15 0 21920 1268 856 S 0 0.0 0:01.48 sshd 3809 root 15 0 8712 828 656 S 0 0.0 0:00.00 xinetd 3827 ntp 15 0 18560 5296 4228 S 0 0.1 0:00.00 ntpd 3837 root 18 0 19544 1336 1020 S 0 0.0 0:00.00 vsftpd 3856 root 16 0 34996 2552 1092 S 0 0.0 0:00.00 sendmail 3864 smmsp 16 0 27788 1904 836 S 0 0.0 0:00.00 sendmail 3875 root 15 0 4176 348 268 S 0 0.0 0:00.00 gpm 4058 root 16 0 96100 5544 2604 S 0 0.1 0:00.16 hpsmhd 4059 root 16 0 18776 1204 884 S 0 0.0 0:00.00 rotatelogs 4061 root 18 0 18776 1200 880 S 0 0.0 0:00.00 rotatelogs 4070 root 16 0 57072 952 536 S 0 0.0 0:00.01 crond 4079 hpsmh 19 0 364m 4364 1280 S 0 0.1 0:00.00 hpsmhd 4129 xfs 16 0 10228 1736 808 S 0 0.0 0:00.01 xfs 4141 root 15 0 285m 9296 4884 S 0 0.1 0:04.03 ovcd 4149 root 16 0 93996 6000 4020 S 0 0.1 0:02.58 ovbbccb 4168 root 15 0 91508 8708 5720 S 0 0.1 0:05.28 opcmsga 4170 root 16 0 95364 6396 4696 S 0 0.1 0:00.11 ovconfd 4192 root 16 0 29788 7444 4964 S 0 0.1 0:00.05 opcacta 4195 root 16 0 112m 7828 5732 S 0 0.1 0:01.07 coda 4199 root 18 0 17304 6928 4524 S 0 0.1 0:00.03 opcmsgi 4202 root 15 0 17396 7136 4688 S 0 0.1 0:00.35 opcle 4205 root 15 0 19884 7680 5192 S 0 0.1 0:00.06 opcmona 4224 root 16 0 8912 420 292 S 0 0.0 0:00.00 atd 4243 dbus 16 0 9644 788 616 S 0 0.0 0:00.05 dbus-daemon-1 4346 root 16 0 2876 1856 980 S 0 0.0 0:00.00 p_ctmag 4466 root 16 0 2868 1824 956 S 0 0.0 0:00.01 p_ctmat 4501 root 16 0 8992 932 776 S 0 0.0 0:00.00 cups-config-dae 4512 root 15 0 20184 7396 1268 S 0 0.1 0:35.79 hald 4530 root 15 0 4820 1660 1396 S 0 0.0 0:00.01 mstragent 4623 root 16 0 15588 2680 1980 S 0 0.0 0:00.46 mstragent 4653 root 16 0 55776 8628 5328 S 0 0.1 0:13.80 tlmagent 4864 root 17 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4865 root 17 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4866 root 18 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4867 root 18 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4869 root 17 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4871 root 18 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4873 root 16 0 90144 2900 2316 S 0 0.0 0:00.03 gdm-binary 5567 root 16 0 102m 2508 1812 S 0 0.0 0:00.00 gdm-binary 5583 root 15 0 58056 11m 2676 S 0 0.1 0:01.59 X 5680 root 16 0 31312 2704 1772 S 0 0.0 0:00.00 dsmcad 5688 gdm 15 0 123m 11m 6740 S 0 0.1 0:00.55 gdmgreeter 5989 www 15 0 470m 135m 16m S 0 1.7 1:29.22 java 8118 www 18 0 52756 1100 904 S 0 0.0 0:00.00 startPortalServ 8120 www 25 0 1567m 432m 32m S 0 5.4 25:58.16 java 8217 www 18 0 52756 1088 904 S 0 0.0 0:00.00 startJMSServer. 8219 www 16 0 909m 150m 23m S 0 1.9 9:08.18 java 8276 www 18 0 52756 1100 904 S 0 0.0 0:00.00 startEjbServer. 8278 www 17 0 1648m 411m 36m S 0 5.2 43:43.24 java 6489 root 16 0 38124 2564 2008 S 0 0.0 0:00.05 sshd 6491 www 15 0 38284 1920 1288 S 0 0.0 0:00.09 sshd 6495 www 16 0 18456 1516 1124 S 0 0.0 0:00.02 sftp-server 16777 root 16 0 38124 2604 2036 S 0 0.0 0:00.01 sshd 16779 www 16 0 38256 1856 1240 S 0 0.0 0:00.12 sshd 16780 www 16 0 53976 1616 1204 S 0 0.0 0:00.11 bash 16825 root 16 0 38124 2604 2036 S 0 0.0 0:00.01 sshd 16827 www 15 0 38256 1860 1252 S 0 0.0 0:00.12 sshd 16828 www 15 0 53976 1620 1212 S 0 0.0 0:00.02 bash 17473 root 16 0 38124 2604 2036 S 0 0.0 0:00.02 sshd 17480 www 16 0 38124 1776 1204 S 0 0.0 0:00.00 sshd 17481 www 16 0 53976 1612 1204 S 0 0.0 0:00.01 bash 17726 root 16 0 38124 2620 2052 S 0 0.0 0:00.01 sshd 17728 epcs 15 0 38256 1880 1284 S 0 0.0 0:00.03 sshd 17729 epcs 17 0 2724 624 444 S 0 0.0 0:00.00 ksh 17762 root 18 0 72296 1304 1012 S 0 0.0 0:00.00 su 17763 root 15 0 2724 664 484 S 0 0.0 0:00.01 ksh 17785 root 16 0 38124 2620 2052 S 0 0.0 0:00.00 sshd 17788 epcs 15 0 38256 1880 1284 S 0 0.0 0:00.00 sshd 17789 epcs 15 0 2724 624 444 S 0 0.0 0:00.01 ksh 17822 root 17 0 72296 1304 1012 S 0 0.0 0:00.00 su 17823 root 16 0 2724 652 472 S 0 0.0 0:00.00 ksh 17848 root 16 0 73036 1280 768 S 0 0.0 0:00.00 crond 17850 root 18 0 5356 912 776 S 0 0.0 0:00.00 sh 17853 root 16 0 13384 1708 1336 S 0 0.0 0:00.00 perl 17861 root 18 0 3636 528 436 S 0 0.0 0:00.00 vmstat 'top' output when system is healthy, after reboot and app startup: === top - 08:57:03 up 2 days, 12:12, 1 user, load average: 0.08, 0.08, 0.05 Tasks: 125 total, 2 running, 123 sleeping, 0 stopped, 0 zombie Cpu(s): 1.3% us, 0.1% sy, 0.0% ni, 98.2% id, 0.3% wa, 0.0% hi, 0.0% si Mem: 8164332k total, 3232068k used, 4932264k free, 507500k buffers Swap: 16777208k total,0k used, 16777208k free, 1036236k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1370 www 15 0 6144 936 696 R 2 0.0 0:00.01 top 1 root 16 0 4752 556 460 S 0 0.0 0:00.99 init 2 root RT 0 0 0 0 S 0 0.0 0:00.16 migration/0 3 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/0 4 root RT 0 0 0 0 S 0 0.0 0:00.12 migration/1 5 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/1 6 root RT 0 0 0 0 S 0 0.0 0:00.14 migration/2 7 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/2 8 root RT 0 0 0 0 S 0 0.0 0:00.08 migration/3 9 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/3 10 root 5 -10 0 0 0 S 0 0.0 0:00.14 events/0 11 root 5 -10 0 0 0 S 0 0.0 0:00.00 events/1 12 root 5 -10 0 0 0 S 0 0.0 0:00.01 events/2 13 root 5 -10 0 0 0 S 0 0.0 0:00.03 events/3 14 root 5 -10 0 0 0 S 0 0.0 0:00.01 khelper 15 root 15 -10 0 0 0 S 0 0.0 0:00.00 kacpid 70 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/0 71 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/1 72 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/2 73 root 5 -10 0 0 0 S 0 0.0 0:00.00 kblockd/3 74 root 15 0 0 0 0 S 0 0.0 0:00.12 khubd 101 root 20 0 0 0 0 S 0 0.0 0:00.00 pdflush 102 root 15 0 0 0 0 S 0 0.0 0:01.27 pdflush 105 root 12 -10 0 0 0 S 0 0.0 0:00.00 aio/0 103 root 25 0 0 0 0 S 0 0.0 0:00.00 kswapd1 104 root 25 0 0 0 0 S 0 0.0 0:00.00 kswapd0 106 root 5 -10 0 0 0 S 0 0.0 0:00.00 aio/1 107 root 5 -10 0 0 0 S 0 0.0 0:00.00 aio/2 108 root 5 -10 0 0 0 S 0 0.0 0:00.00 aio/3 252 root 23 0 0 0 0 S 0 0.0 0:00.00 kseriod 400 root 7 -10 0 0 0 S 0 0.0 0:00.00 kmirrord 423 root 15 0 0 0 0 S 0 0.0 0:01.08 kjournald 1705 root 6 -10 3604 444 364 S 0 0.0 0:00.01 udevd 2336 root 6 -10 0 0 0 S 0 0.0 0:00.00 kauditd 2472 root 15 0 0 0 0 S 0 0.0 0:00.00 emcpd 2473 root 15 0 0 0 0 S 0 0.0 0:00.00 emcpdefd 2474 root 19 0 0 0 0 S 0 0.0 0:00.00 emcprequestd 2646 root 20 0 0 0 0 S 0 0.0 0:00.00 MpxAsyncIoDaemo 2647 root 20 0 0 0 0 S 0 0.0 0:00.00 MpxResumeIoDaem 2648 root 15 0 0 0 0 S 0 0.0 0:00.00 MpxPeriodicCall 2649 root 20 0 0 0 0 S 0 0.0 0:00.00 MpxGrDaemon 2650 root 20 0 0 0 0 S 0 0.0 0:00.00 MpxProactiveDae 2651 root 20 0 0 0 0 S 0 0.0 0:00.00 MpxDispatchDaem 2652 root 20 0 0 0 0 S 0 0.0 0:00.00 MpxTestDaemon 2725 root 5 -10 0 0 0 S 0 0.0 0:00.00 kmpathd/0 2726 root 5 -10 0 0 0 S 0 0.0 0:00.00 kmpathd/1 2727 root 5 -10 0 0 0 S 0 0.0 0:00.00 kmpathd/2 2728 root 8 -10 0 0 0 S 0 0.0 0:00.00 kmpathd/3 2756 root 15 0 0 0 0 S 0 0.0 0:00.14 kjournald 2757 root 15 0 0 0 0 S 0 0.0 0:00.00 kjournald 2758 root 15 0 0 0 0 S 0 0.0 0:00.00 kjournald 2759 root 15 0 0 0 0 S 0 0.0 0:00.74 kjournald 2760 root 15 0 0 0 0 S 0 0.0 0:00.01 kjournald 2761 root 15 0 0 0 0 S 0 0.0 0:00.59 kjournald 2762 root 15 0 0 0 0 S 0 0.0 0:05.38 kjournald 2763 root 15 0 0 0 0 S 0 0.0 0:05.11 kjournald 3151 root 15 0 2528 276 208 S 0 0.0 0:03.74 cpuspeed 3152 root 15 0 2528 272 204 S 0 0.0 0:03.33 cpuspeed 3153 root 15 0 2528 272 204 S 0 0.0 0:02.75 cpuspeed 3154 root 15 0 2528 272 204 S 0 0.0 0:07.42 cpuspeed 3469 root 16 0 3628 608 496 S 0 0.0 0:00.64 syslogd 3473 root 16 0 2536 376 300 S 0 0.0 0:00.00 klogd 3484 root 16 0 2548 304 204 S 0 0.0 0:00.05 irqbalance 3496 rpc 16 0 4748 588 464 S 0 0.0 0:00.00 portmap 3516 root 17 0 5800 748 624 S 0 0.0 0:00.00 rpc.statd 3548 root 16 0 20916 392 188 S 0 0.0 0:00.00 rpc.idmapd 3733 root 19 0 2540 448 360 S 0 0.0 0:00.00 acpid 3747 root 16 0 6092 1876 532 S 0 0.0 0:00.00 perl 3794 root 16 0 21920 1268 856 S 0 0.0 0:04.97 sshd 3809 root 15 0 8712 828 656 S 0 0.0 0:00.00 xinetd 3827 ntp 15 0 18560 5296 4228 S 0 0.1 0:00.01 ntpd 3837 root 18 0 19544 1336 1020 S 0 0.0 0:00.00 vsftpd 3856 root 16 0 34996 2552 1092 S 0 0.0 0:00.01 sendmail 3864 smmsp 15 0 27788 1908 840 S 0 0.0 0:00.00 sendmail 3875 root 15 0 4176 348 268 S 0 0.0 0:00.00 gpm 4058 root 15 0 96100 5544 2604 S 0 0.1 0:00.16 hpsmhd 4059 root 16 0 18776 1204 884 S 0 0.0 0:00.00 rotatelogs 4061 root 20 0 18776 1200 880 S 0 0.0 0:00.00 rotatelogs 4070 root 16 0 57072 952 536 S 0 0.0 0:00.15 crond 4079 hpsmh 18 0 364m 4364 1280 S 0 0.1 0:00.00 hpsmhd 4131 xfs 16 0 10228 1736 808 S 0 0.0 0:00.01 xfs 4161 root 15 0 285m 9628 4888 S 0 0.1 0:10.40 ovcd 4169 root 16 0 93996 6184 4020 S 0 0.1 0:06.91 ovbbccb 4188 root 15 0 92452 8960 5800 S 0 0.1 0:14.04 opcmsga 4190 root 16 0 96372 6424 4700 S 0 0.1 0:00.10 ovconfd 4212 root 16 0 28768 7440 4960 S 0 0.1 0:00.08 opcacta 4214 root 15 0 112m 7884 5736 S 0 0.1 0:02.83 coda 4219 root 18 0 17304 6928 4524 S 0 0.1 0:00.03 opcmsgi 4222 root 15 0 17396 7136 4688 S 0 0.1 0:00.74 opcle 4226 root 15 0 19884 7680 5192 S 0 0.1 0:00.12 opcmona 4244 root 16 0 8912 420 292 S 0 0.0 0:00.00 atd 4264 dbus 16 0 9644 788 616 S 0 0.0 0:00.07 dbus-daemon-1 4412 root 16 0 2876 1856 980 S 0 0.0 0:00.00 p_ctmag 4581 root 16 0 2868 1824 956 S 0 0.0 0:00.01 p_ctmat 4610 root 16 0 8992 932 776 S 0 0.0 0:00.00 cups-config-dae 4621 root 15 0 20184 7384 1272 S 0 0.1 1:38.28 hald 4638 root 15 0 4820 1660 1396 R 0 0.0 0:00.03 mstragent 4732 root 16 0 15312 2528 1980 S 0 0.0 0:00.10 mstragent 4770 root 16 0 55752 8556 5300 S 0 0.1 0:44.37 tlmagent 4973 root 18 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4974 root 18 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4975 root 18 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4976 root 18 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4978 root 21 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4981 root 18 0 2524 404 336 S 0 0.0 0:00.00 mingetty 4982 root 15 0 90144 2900 2316 S 0 0.0 0:00.03 gdm-binary 5662 root 16 0 102m 2508 1812 S 0 0.0 0:00.00 gdm-binary 5672 root 15 0 58056 11m 2676 S 0 0.1 0:05.28 X 5775 root 16 0 31312 2704 1772 S 0 0.0 0:00.00 dsmcad 5783 gdm 15 0 123m 11m 6740 S 0 0.1 0:00.62 gdmgreeter 6176 www 15 0 500m 143m 16m S 0 1.8 3:56.92 java 17994 www 18 0 52756 1100 904 S 0 0.0 0:00.00 startPortalServ 17996 www 16 0 1593m 289m 30m S 0 3.6 32:01.04 java 18095 www 18 0 52756 1088 904 S 0 0.0 0:00.00 startJMSServer. 18097 www 17 0 901m 151m 23m S 0 1.9 14:11.92 java 18386 www 18 0 52756 1100 904 S 0 0.0 0:00.00 startEjbServer. 18388 www 15 0 1586m 322m 34m S 0 4.0 60:01.31 java 29526 root 16 0 71116 2156 1592 S 0 0.0 0:00.00 cupsd 32292 root 17 0 73036 1280 768 S 0 0.0 0:00.00 crond 32295 root 18 0 5356 912 776 S 0 0.0 0:00.00 sh 32296 root 16 0 13384 1716 1344 S 0 0.0 0:00.00 perl 32305 root 16 0 3636 532 440 S 0 0.0 0:00.00 vmstat 1333 root 16 0 38124 2604 2036 S 0 0.0 0:00.02 sshd 1337 www 16 0 38256 1836 1240 S 0 0.0 0:00.00 sshd 1338 www 16 0 53976 1608 1204 S 0 0.0 0:00.02 bash |
sort top output based on memory usage..outputs which you pasted here not sorted with memory usage.
Press M ( capital M) in intractive mode to sort top output by memory usage. Once you sort you will get the process on the top of TOP command output. Or you can get the usage of particular process for example to find java process run following command ps axu --sort:rss | grep "java" |
I did sort by memory usage (not the one i posted above), but my problem is that even after kiilling '-9' the 4 heavy java processes, I still got memory usage at around 7GB (so what is consuming all the memory? which process(es)?Can anyone tell by looking at the top command results? or the top command does not really show everything going on?
|
If you are not able find memory usage from top use other ways like ps command or pmap command or Examp( if it work on your linux distro) . Exmap is a tool which allows you to see how much memory is in use by different processes.
www.berthels.co.uk/exmap/faq.html www.berthels.co.uk/exmap Exmap has documentation that explains its use and the meaning of the various values. In short: Run exmap. It may be better to run exmap as root in order to get access to all memory. The 'Processes' tab shows memory information about each process in the first listview. The values are: VM - VIRT from top - not really useful. Mapped size - the total of memory actually used by the process, both in RAM and swap. Note however that e.g. libraries are not swapped out to swap but simply discarded (and read again from the files if needed). This value includes even shared memory. Resident size - mapped size, but only in RAM (without swap). Sole mapped - memory used only by this process. For example if a process uses a shared library that no other process uses at the moment it is included here. Writable - memory with the processes' private data. It is part of sole mapped that the process has already written to. Effective - the effective values are an attempt to compute how much memory a process uses in practice. Effective mapped/resident are mapped/resident values adjusted for shared memory. Memory that is shared by more processes is equally divided among them, i.e. if 10 processes use a 10MB large shared library (and each of them really uses the whole library), the library is counted as 10MB in mapped/resident values but only as 1MB in effective values. The second listview shows memory mappings for the selected process. There are memory-mapped files and binaries and also several special mappings: [heap] - dynamically allocated memory (i.e. malloc etc.) [stack] - the stack of the process [anon] - anonymous mapping from the mmap() system call - they should usually be viewed the same like [heap] although with multithreaded applications some [anon] mappings may be another [stack] mappings The remaining two listviews provide details about the mappings. For experts (see exmap documentation). Exmap in practice: Run exmap (possibly as root, if you get messages about failures to open files and you need them). Sort processes by effective mapped size. Higher values are worse. Use the second listview to find out which file is possibly responsible or if the high memory usage comes from the process data ([heap], [anon] and [stack]). It usually cannot be changed which libraries are used, so the values that should be actually checked are writable and sole mapped columns - they are the memory actually used by the application itself (although a portion may come from calling library functions of course). |
| All times are GMT -5. The time now is 12:35 PM. |