Re: [Devil-Linux-discuss] [BULK] Re: RAM Usage

[Frank W. <Fra...@ct...>]

On Tuesday 06 November 2007 20:28:07 Serge Leschinsky wrote:
> Hi Matthew,
>
> Matthew Hattersley wrote:
> > We have around 150 DL boxes out in the wild now, and there may be a
> > small problem that keeps happening. Under heavy load the boxes will
> > start running low on RAM, at which point we get malloc errors for some
> > daemons running on the unit. First thing to go is usual snmpd, which
> > isn't a major issue. But further down the line we start loosing things
> > like ssh, and in some cases even more crtical processes.
>
> That's weird! I've just finished troubleshooting of terrible memory leaks
> in our application (not DL related) and faced that net-snmp 5.4.0 eats
> memory with greate speed (especially libsnmp). The release notes for 5.4.1
> show that some leaks were fixed in 5.4.1 (  [BUG 1619827],[PATCH 1616912],
> [PATCH 1592706]). I think we may update net-snmp to 5.4.1 but I've not
> checked yet if the update really solves our problem (and I can't guarantee
> it solves your problem).

I can confirm the memory leakage in net-snmpd. At the time I discovered it =
I=20
googled around a bit, and it seemed to be a well known problem with=20
net-snmpd.=20

snmpd eats up to 90% of memory on my DLs (256 MB RAM), and then stuff start=
s=20
to fail. I obviously notice it when ssh fails.

As a workaround, I just restart snmpd on all my DLs every once in a while..=
=2E.=20
MRTG handles this nicely, and I don't loose to much information.

It looks like the problem occurs mostly/sooner on boxes that run ipsec tunn=
els=20
too.

Matthew: wow, 150 DLs. How do you manage them?=20

Have a nice day,

=46rank
=2D-=20
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