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|
#pmieconf-rules 1
#
rule network.tcp_retransmit
default = "$rule$"
predicate =
"some_host (
( 100 * ( network.tcp.sndrexmitpack $hosts$ +
network.tcp.rexmttimeo $hosts$ ) /
network.tcp.sndpack $hosts$ ) > $threshold$ &&
network.tcp.sndpack $hosts$ > 100 count/second
)"
enabled = no
version = 1
help =
"There is some network output activity (at least 100 TCP packets per
second) and the average ratio of retransmitted TCP packets to output
TCP packets exceeds threshold percent during the last sample
interval.
High retransmission rates are suggestive of network congestion, or
long latency between the end-points of the TCP connections.";
string rule
default = "high number of TCP packet retransmissions"
modify = no
display = no;
percent threshold
default = 20
help =
"Maximum acceptable percentage of retransmiited TCP packets per TCP
output packet, in the range 0 (not expecting any retransmission) to
100 (chronic saturation on the network).";
string action_expand
default = "%v%@%h"
display = no
modify = no;
|
