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/tcpqfulldrops (1127B)

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

rule	network.tcpqfulldrops
	summary	= "$rule$"
	enumerate = hosts
	predicate =
"some_host (
        network.tcp.reqqfulldrop $hosts$ > 0
)"
	enabled	= yes
	version	= 1
	help	=
"New socket connection attempts are being dropped because the SYN
backlog queue is full.  This occurs when the kernel, accepting new
connections on behalf of a service, has received the client SYN
message, but had not yet received the client ACK, when the SYN backlog
is overrun.  This is likely to be observed mainly on systems with SYN
cookies disabled, as the kernel will enter a different state when they
are enabled (the tcpqfulldocookies rule detects that situation).";

string	rule
	default	= "TCP request queue full drops"
	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 drops: %v%"
	display	= no
	modify	= no;

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

cmd: