Free memory after upgrade to 7.1

[Ivan Voras]

Tomas Randa wrote:
> Hello,
> 
> I have i386/PAE system (php, apache22, mysql) running on 7-STABLE and I
> can see strange behavior after upgrade from 7.0: Apache does not free
> memory, for example:
> 
> CPU: 31.2% user, 0.0% nice, 12.8% system, 0.7% interrupt, 55.3% idle
> Mem: 3520M Active, 3705M Inact, 465M Wired, 314M Cache, 112M Buf, 12M Free
> Swap: 4096M Total, 105M Used, 3991M Free, 2% Inuse
> 
> then apachectl graceful
> 
> CPU: 28.3% user, 0.0% nice, 8.6% system, 0.0% interrupt, 63.1% idle
> Mem: 631M Active, 3126M Inact, 353M Wired, 213M Cache, 112M Buf, 3693M Free
> Swap: 4096M Total, 1844K Used, 4094M Free
> 
> Some graph: http://max.af.czu.cz/memoryload.png

Please interpret this graph. When did you upgrade FreeBSD? On the 27th?

What are the dips on the 30th and 2nd? Apache restarts?

> I know before upgrade was memory using about 2,5GB, now much more,
> apache sometimes crash.

Please post several lines from "top" describing the processes you think
are using up memory.

For what it's worth, I have a similar situation: i386/PAE, upgraded from
7.0 to 7.1 on a machine with 4 GB RAM (3 GB accessible without PAE). I
see no anomalies, *but* I'm using FastCGI with PHP and apache22-worker.

I think this is the major change in malloc between 7.0 and 7.1:
http://svn.freebsd.org/viewvc/base?view=revision&revision=184602

You can test if it's the cause of your problem by toggling between 'D'
and 'M' options to malloc.conf (see malloc(3), don't forget to restart
apache).

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