Hi, I'm investigating excessive cpu usage in some server software on Solaris 10.
By prstat, the server process is using 13% (out of 25%, since it is a single thread on 4 cores). By Brendan Gregg's hotuser script (see http://www.brendangregg.com/DTrace/hotuser) the function netsnmp_large_fd_set_resize() is using up to 80% of that. By the same script, libnetsnmp.so is using over 80%. The context of the call is that I'm using snmp_select_info() to integrate SNMP into my own event loop which uses select(). (This is pretty much as described under "Own custom event loop" at http://vincent.bernat.im/en/blog/2012-snmp-event-loop.html) netsnmp_large_fd_set_resize() is called from snmp_read() and run_alarms(). The app is using net-snmp-5.6.1.1. Would upgrading the library (not a trivial task) improve the situation? Can anyone suggest what can be done to alleviate this. 64 bit Solaris has a fixed FD_SETSIZE of 64k, so what does netsnmp_large_fd_set_resize() need to resize that for? Why does it require space for more than 65535 handles? Also, how might the number of traps, and/or the configuration of the snmpd daemon affect this? I don't have in depth knowledge of this protocol so I hope this is enough info. Thanks in advance! Jono Poff. Senior Design Engineer Tait Communications Email: jonathan.p...@taitradio.com www.taitradio.com -- ------------------------------ This email, including any attachments, is only for the intended recipient. It is subject to copyright, is confidential and may be the subject of legal or other privilege, none of which is waived or lost by reason of this transmission. If you are not an intended recipient, you may not use, disseminate, distribute or reproduce such email, any attachments, or any part thereof. If you have received a message in error, please notify the sender immediately and erase all copies of the message and any attachments. Unfortunately, we cannot warrant that the email has not been altered or corrupted during transmission nor can we guarantee that any email or any attachments are free from computer viruses or other conditions which may damage or interfere with recipient data, hardware or software. The recipient relies upon its own procedures and assumes all risk of use and of opening any attachments. ------------------------------ ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho _______________________________________________ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
