Hi Michael,
SNMP4J does not hold or collect any significant
overhead. For big tables, I would recommend
using the async method instead of the sync
one. The performance can only be better.
If you say it is worse, maybe something else
happens:
A probable cause of an OutOfMemory is an
agent that does not return rows in lexicograhpic
order or if it returns than there actually
are. SNMP4J tries to detect incorrect ordering
but especially with sparse tables, it may happen
that the internal cache of TableUtils get very
big.
In such a case, if you can, try to fix the agent
or use Snmp.getNext or .getBulk with your own
(adapted) order checking.
Hope this helps.
Best regards,
Frank
Michael Yavorovsky wrote:
public List getTable(Target target,
OID[] columnOIDs,
OID lowerBoundIndex,
OID upperBoundIndex)
I'm falling on OutOfMemory while calling this method without upper/lower
indexes. It seems to me that there no way to influence this flow. By the
way, increasing heap size solves the problem ... till bigger tables are
to be retrieved. So I think that SNMP4J data structures have a lot
metadata that makes the response very big.
-----Original Message-----
From: Robert Stacy [mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 23, 2008 4:27 PM
To: Michael Yavorovsky
Cc: [email protected]
Subject: Re: [SNMP4J] TableUtils getTable problems
Michael Yavorovsky wrote:
Hi,
I'm using TableUtils.getTable (SNMPv1) to get rather big tables
(something like 2k rows) and on some step I started to get OutOfMemory
exceptions while running this method. Than I tried to get those tables
asynchronously and got worse performance. Is there any other solution
to provide better performance for big SNMP tables?
Thanks in advance,
Michael
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Not sure why you are getting an out of memory exception. I have
actually retrieved much larger tables than that using TableUtils both
synchronously and asynchronously and have had no issues. Check the code
you are executing when processing the table maybe.
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