FM / network

/var/lib/pcp/config/pmieconf/network

Name	Size	Mode	Actions
tcplistenoverflows	969	0644	edit dl rm
tcpqfulldocookies	1129	0644	edit dl rm
tcpqfulldrops	1127	0644	edit dl rm

Edit: /etc/pcp/pmieconf/network/tcpqfulldocookies (1129B)

#pmieconf-rules 1
# --- DO NOT MODIFY THIS FILE --- see pmieconf(5)
#

rule	network.tcpqfulldocookies
	summary	= "$rule$"
	enumerate = hosts
	predicate =
"some_host (
        network.tcp.reqqfulldocookies $hosts$ > 0
)"
	enabled	= yes
	version	= 1
	help	=
"New socket connection attempts are being dropped because the SYN
backlog queue is full and the kernel's built-in SYN flood prevention
has kicked in.  When the kernel is sending SYN cookies during normal
operation it indicates that the rate of connections is probably too
high for the default limits as SYN cookies are really only meant for
mitigating SYN floods (see also tcpqfulldocookies and listenoverflows
rules for additional details).";

string	rule
	default	= "TCP request queue full SYN cookie replies"
	modify	= no
	display	= no;

string	delta
	default = "2 min"
	help =
"Sample interval between evaluations of this rule.";

string	action_expand
	default	= "%v/sec@%h"
	display	= no
	modify	= no;

string	email_expand
	default	= "host: %h request queue full SYNCOOKIE replies: %v%"
	display	= no
	modify	= no;

#
# --- DO NOT MODIFY THIS FILE --- see pmieconf(5)

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