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

[Mgr. M. J. <mai...@vc...>]

Hello.

I can confirm memory allocation problem of net-snmpd too. I restart=20
net-snmpd in cron once a week and it is enought on router with 512MB ram =

and whole DL in ramdisk.

Jiri Motycka


John Jore napsal(a):
> Frank,
> Thank you very much for this. My DL box was having problems last night =
and a reboot solved it. and it was low on memory with INIT constantly re-=
spawning. And I too use net-snmpd.
>=20
> In your experience, was it enough to restart snmpd and would adding thi=
s to a cron job once a month potentially be enough to avoid restarting th=
e entire DL?
>=20
>=20
> Regards,
> John Jore
>=20
>=20
>=20
> ________________________________________
> From: dev...@li... [devil-linux-di=
scu...@li...] On Behalf Of Frank Weis [Frank.Weis@=
cte.lu]
> Sent: 07 November 2007 07:28
> To: dev...@li...
> Subject: Re: [Devil-Linux-discuss] [BULK] Re:  RAM Usage
>=20
> 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 som=
e
>>> 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 thing=
s
>>> like ssh, and in some cases even more crtical processes.
>> That's weird! I've just finished troubleshooting of terrible memory le=
aks
>> 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=
=2E4.1
>> show that some leaks were fixed in 5.4.1 (  [BUG 1619827],[PATCH 16169=
12],
>> [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 guara=
ntee
>> it solves your problem).
>=20
> I can confirm the memory leakage in net-snmpd. At the time I discovered=
 it I
> googled around a bit, and it seemed to be a well known problem with
> net-snmpd.
>=20
> snmpd eats up to 90% of memory on my DLs (256 MB RAM), and then stuff s=
tarts
> to fail. I obviously notice it when ssh fails.
>=20
> As a workaround, I just restart snmpd on all my DLs every once in a whi=
le....
> MRTG handles this nicely, and I don't loose to much information.
>=20
> It looks like the problem occurs mostly/sooner on boxes that run ipsec =
tunnels
> too.
>=20
> Matthew: wow, 150 DLs. How do you manage them?
>=20
> Have a nice day,
>=20
> Frank
> --
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>=20
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>=20
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