Messages in this thread |  | | From | (Harald Koenig) | Subject | Re: swap problem: not freeing pages ?! | Date | Mon, 17 Jun 1996 21:57:40 +0200 (MET DST) |
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I've tried to reproduce this after rebooting the system (for other reasons) but now eatmem was able to get ~41MB and calculating RSS+free+buffers+cached-shared is *much* closer to the free mem (sum 43464k vs. 45840k total mem.).
note that the system had an uptime of 7 days when I did the first tests where I realized this problem, so this looks a bit like a memory leak to me ?!
below is the complete output of "ps axm ; free" for that test, here RSS+free+buffers+cached-shared = 36480k vs. 45840k total memory
------------------------------------------------------------------------------- PID TTY MAJFLT MINFLT TRS DRS SIZE SWAP RSS SHRD LIB DT COMMAND 1 ? 152 60 0 0 80 80 0 0 0 0 (init) 2 ? 0 0 0 0 0 0 0 0 0 0 (kflushd) 3 ? 29333 0 0 0 0 0 0 0 0 0 (kswapd) 4 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 5 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 6 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 7 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 1400 p0 79 861 0 0 304 304 0 0 0 0 (bash) 205 1 166 722 0 0 344 344 0 0 0 0 (bash) 206 2 26 20 0 0 120 120 0 0 0 0 (getty) 59 ? 868 50 0 0 384 384 0 0 0 0 (syslogd) 68 ? 32 14 0 0 232 224 8 0 8 0 (klogd) 90 ? 2 12 0 0 104 104 0 0 0 0 (portmap) 108 ? 43 251 0 0 104 104 0 0 0 0 (inetd) 144 ? 91 983 0 0 248 248 0 0 0 0 (sendmail) 162 a1 100 10 0 0 64 64 0 0 0 0 (gpm) 172 ? 29 8 0 0 64 64 0 0 0 0 (lpd) 183 ? 0 10 0 0 240 240 0 0 0 0 (smbd) 207 3 26 20 0 0 120 120 0 0 0 0 (getty) 208 4 25 20 0 0 120 120 0 0 0 0 (getty) 209 5 26 20 0 0 120 120 0 0 0 0 (getty) 210 6 24 20 0 0 120 120 0 0 0 0 (getty) 211 S0 172 419 0 0 304 304 0 0 0 0 (bash) 3784 p1 71 138 0 0 296 296 0 0 0 0 (bash) 4151 p2 71 138 0 0 296 296 0 0 0 0 (bash) 3131 p0 593 121 0 0 992 992 0 0 0 0 (emacs) 1397 ? 161 140 0 0 656 656 0 0 0 0 (xterm) 4383 p3 71 138 0 0 296 296 0 0 0 0 (bash) 4433 p4 71 138 0 0 296 296 0 0 0 0 (bash) 3779 ? 154 110 0 0 656 656 0 0 0 0 (xterm) 4571 p5 582 2627 0 0 312 312 0 0 0 0 (bash) 16861 p5 830 162 0 0 1008 1008 0 0 0 0 (emacs) 16957 p5 901 162 0 0 1224 1224 0 0 0 0 (emacs) 4150 ? 154 110 0 0 656 656 0 0 0 0 (xterm) 4430 ? 154 110 0 0 656 656 0 0 0 0 (xterm) 4382 ? 154 110 0 0 656 656 0 0 0 0 (xterm) 17167 p6 451 174 0 0 1504 1504 0 0 0 0 (emacs) 17180 p6 43 50 0 0 344 344 0 0 0 0 (sed) 17181 p6 111 51 0 0 304 304 0 0 0 0 (less) 17349 p6 137 38 0 0 176 176 0 0 0 0 (top) 192 ? 641 54 40 8 144 96 48 32 0 2 nmbd -D 213 ? 0 2 48 8 80 24 56 40 0 2 update (bd 79 ? 643 43878 80 0 200 120 80 80 0 0 (crond) 4568 ? 1171 310 80 0 952 872 80 80 0 0 (xterm) 156 ? 5 28 8 8 192 104 88 88 72 11 (httpd) 160 ? 1 8 8 8 184 96 88 88 72 11 (httpd) 119 ? 15 14 88 8 208 112 96 72 0 3 rpc.mountd 128 ? 17 15 80 8 208 112 96 64 8 4 rpc.nfsd 17426 p6 53 23 184 8 296 0 296 176 104 15 ./ps axm 4569 ? 241 45 280 8 496 104 392 240 104 19 /usr/X11R6 4570 ? 1027 145 352 8 592 112 480 304 120 11 /usr/X11R6 16894 p6 1080 3071 464 8 704 32 672 416 200 32 bash 16893 ? 1754 506 512 8 1744 992 752 456 232 25 /usr/X11R6 17417 p5 12259 11100 40 0 40160 7536 32624 40 32584 4073 (eatmem) RSS sum 35856
total used free shared buffers cached Mem: 45840 45304 536 2000 136 1952 -/+ buffers: 43216 2624 Swap: 52216 31048 21168 -------------------------------------------------------------------------------
as you can see for my first test eatmem got no more than 32.5M,
after killing eatmem and running "swapoff -a ; swapon -a" I got
------------------------------------------------------------------------------- PID TTY MAJFLT MINFLT TRS DRS SIZE SWAP RSS SHRD LIB DT COMMAND 2 ? 0 0 0 0 0 0 0 0 0 0 (kflushd) 3 ? 30932 0 0 0 0 0 0 0 0 0 (kswapd) 4 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 5 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 6 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 7 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 162 a1 100 10 8 4 32 0 32 0 20 8 gpm -t msc 172 ? 29 8 8 4 32 0 32 0 20 8 lpd 1 ? 152 60 8 8 40 0 40 0 24 10 init [3] 213 ? 0 2 24 4 40 0 40 20 12 5 update (bd 90 ? 2 12 8 4 52 0 52 0 40 13 portmap 108 ? 43 251 8 4 52 0 52 0 40 13 inetd 206 2 26 20 8 4 60 0 60 0 48 15 /sbin/gett 207 3 26 20 8 4 60 0 60 0 48 15 /sbin/gett 208 4 25 20 8 4 60 0 60 0 48 15 /sbin/gett 209 5 26 20 8 4 60 0 60 0 48 15 /sbin/gett 210 6 24 20 8 4 60 0 60 0 48 15 /sbin/gett 17349 p6 137 38 8 8 88 0 88 0 72 22 ./top 160 ? 1 8 12 12 92 0 92 44 68 23 httpd 156 ? 5 28 12 12 96 0 96 44 72 24 httpd 119 ? 15 14 44 4 104 0 104 36 56 17 rpc.mountd 128 ? 17 15 40 4 104 0 104 32 60 18 rpc.nfsd 79 ? 685 43892 56 8 108 0 108 48 44 15 crond 68 ? 32 14 0 8 116 0 116 0 108 28 klogd 183 ? 0 10 20 8 120 0 120 0 92 30 smbd -D 144 ? 91 983 12 8 124 0 124 0 104 31 sendmail: 192 ? 690 57 88 8 132 0 132 76 36 14 nmbd -D 3784 p1 71 138 24 8 148 0 148 0 116 37 -bash 4151 p2 71 138 24 8 148 0 148 0 116 37 -bash 4383 p3 71 138 24 8 148 0 148 0 116 37 -bash 4433 p4 71 138 24 8 148 0 148 0 116 37 -bash 17443 p6 24 23 92 4 148 0 148 88 52 15 ps axm 1400 p0 79 861 24 8 152 0 152 0 120 38 -bash 211 S0 172 419 24 8 152 0 152 0 120 38 -bash 17181 p6 111 51 8 8 152 0 152 0 136 38 less -siew 205 1 166 722 24 8 172 0 172 0 140 43 -bash 17180 p6 43 50 8 8 172 0 172 0 156 43 sed -e s, 59 ? 906 52 0 8 192 0 192 0 184 48 syslogd 4569 ? 241 45 148 12 248 0 248 120 88 32 /usr/X11R6 4570 ? 1056 152 184 12 296 0 296 152 100 35 /usr/X11R6 4571 p5 670 2644 192 8 324 0 324 168 124 39 -bash 1397 ? 161 140 40 16 328 0 328 0 272 82 /usr/X11R6 3779 ? 154 110 40 16 328 0 328 0 272 82 /usr/X11R6 4150 ? 154 110 40 16 328 0 328 0 272 82 /usr/X11R6 4430 ? 154 110 40 16 328 0 328 0 272 82 /usr/X11R6 4382 ? 154 110 40 16 328 0 328 0 272 82 /usr/X11R6 16894 p6 1115 3389 256 8 380 0 380 232 116 37 bash 3131 p0 593 121 272 120 496 0 496 0 104 124 emacs -nw 16861 p5 830 162 300 120 504 0 504 0 84 126 emacs -nw 16957 p5 901 162 340 120 612 0 612 0 152 153 emacs -nw 4568 ? 1304 327 276 16 672 0 672 236 380 109 /usr/X11R6 17167 p6 451 174 384 120 752 0 752 0 248 188 emacs -nw 16893 ? 1833 517 332 16 936 0 936 292 588 161 /usr/X11R6 sum 10224
total used free shared buffers cached Mem: 45840 30184 15656 3000 192 3424 -/+ buffers: 26568 19272 Swap: 52216 0 52216 -------------------------------------------------------------------------------
I've tried to reproduce this situation by simulating the work of the last days (starting tonns of Xserver, rsh, heavy swapping, lots of file access) but I still get RSS+free+buffers+cached-shared > 42M.
this is the output immediately after reboot: ------------------------------------------------------------------------------- PID TTY MAJFLT MINFLT TRS DRS SIZE SWAP RSS SHRD LIB DT COMMAND 2 ? 0 0 0 0 0 0 0 0 0 0 (kflushd) 3 ? 79414 0 0 0 0 0 0 0 0 0 (kswapd) 4 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 5 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 6 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 7 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 205 1 318 275 0 0 296 296 0 0 0 0 (bash) 68 ? 0 11 0 0 232 224 8 0 8 0 (klogd) 90 ? 2 12 0 0 104 104 0 0 0 0 (portmap) 108 ? 12 13 0 0 104 104 0 0 0 0 (inetd) 144 ? 7 22 0 0 248 248 0 0 0 0 (sendmail) 162 ? 12 7 0 0 64 64 0 0 0 0 (gpm) 172 ? 29 8 0 0 64 64 0 0 0 0 (lpd) 183 ? 0 10 0 0 240 240 0 0 0 0 (smbd) 207 3 19 21 0 0 120 120 0 0 0 0 (getty) 208 4 18 21 0 0 120 120 0 0 0 0 (getty) 209 5 19 21 0 0 120 120 0 0 0 0 (getty) 210 6 18 21 0 0 120 120 0 0 0 0 (getty) 211 S0 48 19 0 0 104 104 0 0 0 0 (getty) 213 ? 0 2 48 8 80 24 56 40 0 2 update (bd 1 ? 66 53 72 0 136 64 72 56 0 1 (init) 59 ? 906 49 0 0 384 296 88 0 88 2 (syslogd) 156 ? 5 28 8 8 192 104 88 88 72 11 (httpd) 160 ? 1 8 8 8 184 96 88 88 72 11 (httpd) 119 ? 21 15 88 8 208 112 96 72 0 3 rpc.mountd 128 ? 17 15 80 8 208 112 96 64 8 4 rpc.nfsd 79 ? 692 158 96 0 216 112 104 96 8 1 (crond) 192 ? 659 45 160 8 264 88 176 152 8 3 nmbd -D 303 2 53 20 184 8 288 0 288 176 96 14 ps axm 206 2 463 385 392 8 640 104 536 416 136 24 -bash 301 2 22 42 440 8 688 72 616 464 168 28 -bash 254 1 149535 80749 8 0 48128 7616 40512 8 40504 5063 (eatmem) RSS sum 42824
total used free shared buffers cached Mem: 45840 45288 552 1480 144 1024 -/+ buffers: 44120 1720 Swap: 52216 25680 26536 -------------------------------------------------------------------------------
and after simulated workload: ------------------------------------------------------------------------------- PID TTY MAJFLT MINFLT TRS DRS SIZE SWAP RSS SHRD LIB DT COMMAND 1 ? 84 53 0 0 80 80 0 0 0 0 (init) 2 ? 0 0 0 0 0 0 0 0 0 0 (kflushd) 3 ? 202678 0 0 0 0 0 0 0 0 0 (kswapd) 4 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 5 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 6 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 7 ? 0 0 0 0 0 0 0 0 0 0 (nfsiod) 205 1 35 21 0 0 120 120 0 0 0 0 (getty) 206 2 23 21 0 0 120 120 0 0 0 0 (getty) 59 ? 2430 107 0 0 384 384 0 0 0 0 (syslogd) 68 ? 0 11 0 0 232 224 8 0 8 0 (klogd) 79 ? 1812 803 0 0 120 120 ..,, 0 0 0 0 (crond) 90 ? 2 12 0 0 104 104 0 0 0 0 (portmap) 108 ? 36 370 0 0 128 128 0 0 0 0 (inetd) 144 ? 91 34 0 0 248 248 0 0 0 0 (sendmail) 162 ? 58 7 0 0 64 64 0 0 0 0 (gpm) 172 ? 29 8 0 0 64 64 0 0 0 0 (lpd) 183 ? 0 10 0 0 240 240 0 0 0 0 (smbd) 207 3 29 21 0 0 120 120 0 0 0 0 (getty) 208 4 19 21 0 0 120 120 0 0 0 0 (getty) 209 5 19 21 0 0 120 120 0 0 0 0 (getty) 210 6 18 21 0 0 120 120 0 0 0 0 (getty) 211 S0 27 19 0 0 104 104 0 0 0 0 (getty) 213 ? 10 4 48 8 80 24 56 40 0 2 update (bd 192 ? 1776 100 56 8 160 96 64 48 0 2 nmbd -D 156 ? 5 28 8 8 192 104 88 88 72 11 (httpd) 160 ? 1 8 8 8 184 96 88 88 72 11 (httpd) 119 ? 23 15 88 8 208 112 96 72 0 3 rpc.mountd 128 ? 27 16 80 8 208 112 96 64 8 4 rpc.nfsd 1771 p0 53 20 184 8 288 0 288 176 96 14 ps axm 225 ? 342 39 280 8 496 104 392 240 104 19 /usr/X11R6 224 ? 3157 453 352 8 592 112 480 304 120 13 /usr/X11R6 227 p0 699 9478 424 8 760 152 608 464 176 26 -bash 1769 p0 26 46 472 8 808 112 696 512 216 33 -bash 226 ? 1002 230 632 8 1232 400 832 576 192 19 /usr/X11R6 1766 p0 7131 9515 40 0 48160 10512 37648 40 37608 4701 (eatmem) RSS sum 41440
total used free shared buffers cached Mem: 45840 45304 536 2464 160 1984 -/+ buffers: 43160 2680 Swap: 52216 16928 35288 -------------------------------------------------------------------------------
enough data to get some more ideas what's wrong ?
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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