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Date:      Mon, 16 Jul 2001 18:49:46 +0100 (BST)
From:      Rob <rob@breakbeat.net>
To:        freebsd-questions@freebsd.org
Subject:   Inactive/leak memory
Message-ID:  <Pine.BSF.4.21.0107161837370.1233-100000@phoenix.shells.co.uk>

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Hi,

I'm running 4.3 on a dual P3-550, with 1Gb RAM, and have been noticing odd
reports in the 'top' values. After a reboot, the server slowly begins to lose
memory from the free column into the inactive column, resulting in a bizarre set
of values.
This server is a live webserver, running Apache, with PHP and PostgreSQL. The
laods are fairly low, and since I've had this box constantly CVSupped, with the
latest updates to the webserver etc, I'm pretty stumped as to why this situation
is happening.

Here's the top part of the top output, after only 15 days of uptime:

last pid: 99471;  load averages:  0.56,  0.24,  0.13 
                           up 15+21:26:00  17:13:02
50 processes:  1 running, 49 sleeping
CPU states:  1.9% user,  0.0% nice,  1.4% system,  0.4% interrupt, 96.3% idle
Mem: 22M Active, 668M Inact, 87M Wired, 152K Cache, 112M Buf, 227M Free
Swap: 512M Total, 512M Free

  PID USERNAME PRI NICE  SIZE    RES STATE  C   TIME   WCPU    CPU COMMAND
  189 pgsql      2   0  4408K  1552K select 1  11:36  0.00%  0.00% postgres
  207 root       2   0  4856K  4012K select 1   4:43  0.00%  0.00% httpd
72058 www        2   0  5252K  4624K sbwait 1   0:55  0.00%  0.00% httpd
79544 www       18   0  5300K  4584K lockf  0   0:35  0.00%  0.00% httpd
80731 www        2   0  5184K  4488K sbwait 1   0:35  0.00%  0.00% httpd
80748 www        2   0  5168K  4536K sbwait 1   0:35  0.00%  0.00% httpd
85255 www       18   0  5176K  4544K lockf  0   0:26  0.00%  0.00% httpd
  154 root       2   0  1256K   884K select 1   0:26  0.00%  0.00% sshd1
  147 root      10   0   968K   736K nanslp 0   0:07  0.00%  0.00% cron
  150 root       2   0  2484K  2036K select 0   0:06  0.00%  0.00% sendmail
  124 root       2   0   924K   612K select 1   0:05  0.00%  0.00% syslogd
95582 www        2   0  5244K  4604K sbwait 1   0:04  0.00%  0.00% httpd
95470 www        2   0  5068K  4368K sbwait 1   0:04  0.00%  0.00% httpd
98534 www        2   0  5076K  4432K sbwait 0   0:01  0.00%  0.00% httpd
  194 root       2   0  1236K   888K select 0   0:01  0.00%  0.00% sshd1

This seems to happen slowly, until it reaches about 20M Free, upon which I tend
to reboot.

Any ideas? I thought that perhaps as inactive memory is still available to the
system if needed that it might be okay to leave it, but a explanation may put my
heart at rest..

Rob.
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