If you're using ganglia to monitor web servers, you might find this script useful. It runs netstat, counts connections on port 80, and breaks them down by TCP state (ESTABLISHED, TIME_WAIT, etc.) and feeds each of those to ganglia as a separate metric.
http://thwip.sysadmin.org/netconncnt You may need to slightly modify the list of states at the beginning to match your OS - for example, your version of netstat may report connections in SYN_RCVD rather than SYN_RECV. It can also be easily modified for any other sort of server where you want to keep track of the number of network connections. Just change $filter at the beginning from ":80" to some other substring that picks out the connections you want to count, and change my $metric near the end to change the basename from "net_port80_" to something more suitable (like "net_mysql_"). I use it in conjuction with this graph definition I added to graph.php: else if ($graph == "net_port80") { $style = "Port 80 Connections"; $lower_limit = "--lower-limit 0 --rigid"; # $upper_limit = "--upper-limit 20"; $extras = "--base 1024"; $vertical_label = "--vertical-label 'Connections'"; $series = "DEF:'established'='${rrd_dir}/net_port80_established.rrd':'sum':AVERAGE " ."DEF:'closewait'='${rrd_dir}/net_port80_close_wait.rrd':'sum':AVERAGE " ."DEF:'closing'='${rrd_dir}/net_port80_closing.rrd':'sum':AVERAGE " ."DEF:'finwait1'='${rrd_dir}/net_port80_fin_wait1.rrd':'sum':AVERAGE " ."DEF:'finwait2'='${rrd_dir}/net_port80_fin_wait2.rrd':'sum':AVERAGE " ."DEF:'synsent'='${rrd_dir}/net_port80_syn_sent.rrd':'sum':AVERAGE " ."DEF:'synrecv'='${rrd_dir}/net_port80_syn_recv.rrd':'sum':AVERAGE " ."DEF:'lastack'='${rrd_dir}/net_port80_last_ack.rrd':'sum':AVERAGE " ."DEF:'timewait'='${rrd_dir}/net_port80_time_wait.rrd':'sum':AVERAGE " ."CDEF:'tw10'=timewait,10,/ " ."AREA:'tw10'#d0d0d0:'time_wait/10' " ."LINE1:'lastack'#303030:'last_ack' " ."LINE1:'closing'#e82828:'closing' " ."LINE1:'closewait'#600000:'close_wait' " ."LINE1:'synsent'#b00000:'syn_sent' " ."LINE1:'finwait1'#00a020:'fin_wait1' " ."LINE1:'synrecv'#662288:'SYN_RECV' " ."LINE2:'finwait2'#00c060:'FIN_WAIT2' " ."LINE2:'established'#0000c0:'ESTABLISHED' "; } -- Cos (Ofer Inbar) -- [EMAIL PROTECTED] "A distributed system is one in which I cannot get any work done because a machine I've never heard of is down" -- Leslie Lamport ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
