[AGENT++] Memory issue with Informs

[Frank Fock]

Hi Mayank,

Like Bob, I guess that memory consumption is caused
by massive concurrent waiting on INFORM responses.

If your system is sending that much traps/informs
you should think about redesigning towards some
sort of alarm aggregation/filter. Otherwise,
also the management application will have problems
to process the trap/inform flood.

Best regards,
Frank


Mayank Thakore wrote:
> Hi Bob,
> 
> We are using the sync/blocking call:
> 
> 	virtual int inform(Pdu &pdu, SnmpTarget &target);
> 
> If it fails, we wait for user configured seconds and try again with the same
> Pdu and SnmpTarget. And we keep trying until our agent is shutdown or the
> inform is successfully sent.
> 
> Even when informs are being sent successfully (not necessarily in the first
> try, we set the retry to 3 attempts) the memory rises.
> 
> I will try testing by changing the retry count and not using our own retry
> code. Meanwhile can you give any other pointers?
> 
> If we use trap() instead of inform() the problem disappears.
> 
> Thanks for the help.
> 
> 
> Regards
> Mayank Thakore
> Huawei Technologies
> Mobile: +91-988-665-9544
>  
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> ________________________________________
> From: Bob Natale [mailto:bob.natale at appliedsnmp.com] 
> Sent: Friday, September 28, 2007 22-28
> To: mayankt at huawei.com
> Cc: agentpp at agentpp.org
> Subject: Re: [AGENT++] Memory issue with Informs
> 
> HI Mayank,
>  Are you seeing Responses to the Informs?
> I would guess that some component is holding state for each Inform pending
> Response processing -- emphasis on "guess"! :)
> Cheers,
> BobN
> 
> -----Original Message-----
> From: Mayank Thakore [mailto:mayankt at huawei.com]
> Sent: Friday, September 28, 2007 07:02 AM
> To: agentpp at agentpp.org
> Subject: [AGENT++] Memory issue with Informs
> 
> Hi,
> 
> Our SNMP++ version is 2.6
> Our Agent++ version is 3.5.13a
> 
> We are facing an issue with V2 informs. When we send the inform memory usage
> rises rapidly as we send more and more informs. We tested our whole code and
> found no leaks. Then we finally replaced the inform call with trap call. The
> problem was no longer seen. So we suspect that V2 informs are using up
> memory somewhere.
> 
> We cannot confirm it is a leak since Valgrind did not report any leaks. Can
> someone please tell if there is an issue which will cause memory to be used
> up rapidly when sending many V2 informs?
> 
> Much thanks for the help.
> 
> Regards
> Mayank Thakore
> Huawei Technologies
> Mobile: +91-988-665-9544
> 
> p.s. we checked the Agent++ change log and saw several leaks fixed since
> release 3.5.13a but cannot figure out if any impact us in this case. And we
> don't want to upgrade unless we have to.
>  
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>  This e-mail and attachments contain confidential information from HUAWEI,
> which is intended only for the person or entity whose address is listed
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> but not limited to, total or partial disclosure, reproduction, or
> dissemination) by persons other than the intended recipient's) is
> prohibited. If you receive this e-mail in error, please notify the sender by
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