That does make sense. But it's strange. This server is my main email
server, also running webserver. When I saw how much memory it took, I
logged off of Xwindow and that brought me up to about 180MB. Then as the
week goes by, it started slowly loosing its free memory again. Top seems to
show a usage of maybe 60MB. The other thing is that memory usage increases
faster during the day. I expected it to come back up in the evening, but it
didn't. I just hope that it stops at 62MB. ^_^ Thankx all for your help.
Please take a look at the data below and tell me if it looks right. Thankx
again.
vav
vmstat:
procs memory swap io system
cpu
r b w swpd free buff cache si so bi bo in cs us sy
id
1 0 0 0 61920 118144 46796 0 0 0 3 44 30 0 0
37
-----------------------------------------------------------------
Top:
6:42pm up 8 days, 32 min, 3 users, load average: 0.00, 0.00, 0.00
59 processes: 58 sleeping, 1 running, 0 zombie, 0 stopped
CPU states: 0.0% user, 0.5% system, 0.0% nice, 99.4% idle
Mem: 257492K av, 195320K used, 62172K free, 55052K shrd, 118144K
buff
Swap: 530104K av, 0K used, 530104K free 46796K
cached
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
4418 nobody 0 0 4620 4620 4052 S 0 0.0 1.7 0:00 httpd
4419 nobody 0 0 4596 4596 4100 S 0 0.0 1.7 0:00 httpd
4422 nobody 0 0 4580 4580 4128 S 0 0.0 1.7 0:00 httpd
4420 nobody 0 0 4220 4220 4012 S 0 0.0 1.6 0:00 httpd
4421 nobody 0 0 4220 4220 4012 S 0 0.0 1.6 0:00 httpd
4423 nobody 0 0 4220 4220 4012 S 0 0.0 1.6 0:00 httpd
4424 nobody 0 0 4220 4220 4012 S 0 0.0 1.6 0:00 httpd
4425 nobody 0 0 4220 4220 4012 S 0 0.0 1.6 0:00 httpd
4415 root 0 0 4144 4144 3944 S 0 0.0 1.6 0:00 httpd
30619 named 0 0 2220 2220 916 S 0 0.0 0.8 0:10 named
3884 root 0 0 1196 1196 924 S 0 0.0 0.4 0:00 login
4125 root 0 0 1196 1196 924 S 0 0.0 0.4 0:00 login
7381 root 0 0 1196 1196 924 S 0 0.0 0.4 0:00 login
597 xfs 0 0 1136 1136 648 S 0 0.0 0.4 0:00 xfs
3886 Knic 0 0 992 992 760 S 0 0.0 0.3 0:00 bash
4109 root 0 0 976 976 736 S 0 0.0 0.3 0:00 bash
10647 root 0 0 976 976 736 S 0 0.0 0.3 0:00 bash
4126 Knic 0 0 964 964 740 S 0 0.0 0.3 0:00 bash
7383 Knic 0 0 964 964 740 S 0 0.0 0.3 0:00 bash
4108 root 0 0 948 948 732 S 0 0.0 0.3 0:00 su
10646 root 0 0 948 948 732 S 0 0.0 0.3 0:00 su
14553 Knic 14 0 868 868 668 R 0 0.5 0.3 0:17 top
410 root 0 0 768 768 388 S 0 0.0 0.2 0:03 klogd
3883 root 0 0 760 760 604 S 0 0.0 0.2 0:00
in.telnetd
4124 root 0 0 760 760 604 S 0 0.0 0.2 0:02
in.telnetd
7379 root 0 0 760 760 604 S 0 0.0 0.2 0:00
in.telnetd
424 nobody 0 0 640 640 520 S 0 0.0 0.2 0:00 identd
426 nobody 0 0 640 640 520 S 0 0.0 0.2 0:00 identd
427 nobody 0 0 640 640 520 S 0 0.0 0.2 0:00 identd
428 nobody 0 0 640 640 520 S 0 0.0 0.2 0:00 identd
429 nobody 0 0 640 640 520 S 0 0.0 0.2 0:00 identd
456 root 0 0 620 620 512 S 0 0.0 0.2 0:00 crond
336 root 0 0 560 560 472 S 0 0.0 0.2 0:00 rpc.statd
401 root 4 0 552 552 452 S 0 0.0 0.2 12:43 syslogd
488 root 0 0 532 532 448 S 0 0.0 0.2 0:00 lpd
474 root 15 0 528 528 440 S 0 0.0 0.2 0:13 inetd
442 daemon 0 0 496 496 416 S 0 0.0 0.1 0:00 atd
537 root 0 0 496 496 420 S 0 0.0 0.1 0:00 gpm
350 root 0 0 480 480 412 S 0 0.0 0.1 0:00 apmd
1 root 0 0 476 476 404 S 0 0.0 0.1 0:05 init
311 bin 0 0 428 428 340 S 0 0.0 0.1 0:00 portmap
-------------------------------------------------------------------
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Hogg
Sent: Thursday, December 07, 2000 6:20 PM
To: [EMAIL PROTECTED]
Subject: Re: Memory Leak
-----Original Message-----
From: Vu Vuong <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Thursday, December 07, 2000 5:16 PM
Subject: Memory Leak
>Hi,
> Could someone help me diagnose my system. I use 'top' to monitor the
>system activities. As I watch, the memory used increases. I don't know
>what is causing it. Earlier this week it was at 130MB free, now it's at
>62MB free. I used 'vmstat 1' to see if there were any large file swapping
>involve, but could not see it. Any help would be most appreciated. Thank
>you.
>
Take a look at the output of top again. Do you see how much memory is being
shared and used for disk buffers? Subtract those out from the amount shown
used and you get the real amount of memory your programs are using. The
buffers and share bits will shrink if and when a program needs the RAM.
It's the normal behavior for linux. My system shows 192Megs in use of
256Megs, but 154Megs is just buffers. Leaving only 38Megs in use by
programs. If you start using lots of swap, and you don't see a high buffers
total, then you should worry. Hope this helps.
Jeff Hogg
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vav,
linux is typically aggressive when it comes to memory use. which means it
will use MORE than it needs. you mentioned your system has not begun to
swap, are applications crashing?? is there any one application suffering
performance wise?? it doesn't sound like a memory leak, just linux being a
little over aggressive in memory use.
Jason
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