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Date:      Sat, 11 Oct 1997 02:30:06 -0600 (MDT)
From:      Marc Slemko <marcs@znep.com>
To:        hackers@freebsd.org
Subject:   vm bogons in 2.2?
Message-ID:  <Pine.BSF.3.95.971011021957.16917P-100000@alive.znep.com>

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This is 2.2-stable as of Aug 18.

I have posted on similar things before (running out of swap when there
should be no reason), but haven't really got any ideas.

What I'm seeing now is swap usage growing and growing without being able
to find anything using it.

last pid:  9885;  load averages:  0.79,  0.72,  0.74                   01:59:02
52 processes:  2 running, 48 sleeping, 2 stopped
CPU states:  9.8% user,  0.0% nice, 17.3% system,  1.1% interrupt, 71.8% idle
Mem: 43M Active, 11M Inact, 19M Wired, 18M Cache, 8350K Buf, 2112K Free
Swap: 320M Total, 71M Used, 249M Free, 22% Inuse

  PID USERNAME         PRI NICE SIZE    RES STATE    TIME   WCPU    CPU COMMAND
17925 news            -14   0 29740K 23424K ufslk2 237:27  8.16%  8.16% innd
 3059 news              2   0  9040K  8988K select  27:33  3.17%  3.17% innfee
15153 root              2   0   676K   596K select   0:23  0.72%  0.72% sshd
 9883 marcs            31   0   632K   768K RUN      0:00  2.74%  0.38% top
 9885 news             33   0   252K   740K RUN      0:00  4.69%  0.23% expire
 8476 news              2   0   940K 12504K sbwait   0:17  0.08%  0.08% nnrpd


Then I kill pid 3059.

last pid: 10457;  load averages:  0.95,  0.85,  0.79                   02:05:10
48 processes:  2 running, 44 sleeping, 2 stopped
CPU states: 17.5% user,  0.0% nice, 14.1% system,  3.0% interrupt, 65.4% idle
Mem: 52M Active, 6920K Inact, 19M Wired, 14M Cache, 8351K Buf, 1060K Free
Swap: 320M Total, 36M Used, 284M Free, 11% Inuse

Why is a 10 meg process freeing 35 megs of swap?  I am quite sure that 
killing that process is what caused the problem.

The process allocate and deallocates a reasonably large amount of
memory over time (say... a total of a couple of gigs over the couple
of days it had been running; not much more than ~10 at a time
though).

I haven't seen any changes in 2.2-stable recently that would fix
this, but I will upgrade it when I get around to it to see...




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