OK. The problem seems that netsnmp_create_subtree_cache() malloc memory for SNMP_MSG_GETBULK (in agent/snmp_agent.c) for each session. If there are multiple sessions in process, the memory will be a huge amount. There is no limit. I have checked version 5.3.1 code and found that this part of code is the same as 5.0.9. So, I suspect in the 5.3.1, it will have the same problem for SNMP_MSG_GETBULK.
Does anybody have a solution for it? -----Original Message----- From: Fong Tsui Sent: Sunday, July 16, 2006 1:57 PM To: Fong Tsui; '[email protected]' Subject: RE: snmpd memory leak on snmpbulkget More detail on test: If I send snmpbulkget for querying 60 OIDs ONCE: memory to 8000+K; If I send snmpbulkget for querying 60 OIDs TWICE continuously, memory grows to 10M+. If I send snmpbulkget for querying 60 OIDs THRESS times continuously, memory grows to 12M+. .... .... Hope somebody can point me a direction. Thanks. -----Original Message----- From: Fong Tsui Sent: Sunday, July 16, 2006 1:43 PM To: Fong Tsui; [email protected] Subject: RE: snmpd memory leak on snmpbulkget I did more test and found out that it is not leak. It is a problem when doing stress test, continuously calling snmpbulkget on random OIDs, snmpd memory keeps growing, no-limit, and eventually freezes the system. (It also causes sub-agent memory grows). However, once I stop sending query bulk command, snmpd slowly gets back to its normal memory. For example, in one case, if I send snmpbulkget for querying 60 OIDs, the memory grows to 10M+. The memory will get back to normal once the query request is processed. It seems cache for bulkget data has no limits? Is that a known issue? Where should I look into in the code? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fong Tsui Sent: Friday, July 14, 2006 6:56 PM To: [email protected] Subject: snmpd memory leak on snmpbulkget Hi, I am hitting a case that when doing snmpbulkget in a loop for stress testing, snmpd increases memory dramatically. For the same situation, snmpwalk/snmpget/snmpbulkwalk all work fine. Only snmpbulkget leaks memory. Does anybody have the same experience? Any fix patch for it? or can anybody point out where I should look into in the code? I am running 5.0.9 version and at this moment, it's hard for us to upgrade to newer version. So, I hope to I can find a way to fix it. Any information is appreciated. Thanks, FT ------------------------------------------------------------------------ - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Net-snmp-coders mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/net-snmp-coders ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Net-snmp-coders mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
