| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Delivered_mails
|
Indicates the
number of messages that were received by the router during the last measurement period. |
Number
|
This measure is indicative of the throughput of the server.
If this number is high, the mail server is processing high volume of
mails. A low value indicates a lower throughput.
|
| Dead_mails
|
The number of
dead (undeliverable) mail messages during the last measurement period. |
Number
|
A high value of this measure indicates a problem in delivering mails.
This value should be preferably zero.
|
| Num_waiting_mails
|
Number
of mail messages currently waiting to be routed. |
Number
|
A high value over
a long period of time indicates a problem in delivering mails. This
value should be preferably low. A high value of this measure over a
period of time may lead to dead mails and poor performance of the
server.
|
| Avg_mail_delivery_time
|
Indicates
the average time for mail delivery in seconds. |
Secs
|
A high value of
this measure shows inefficiency of the server. Desirably, this value
should be low. Administrators can compare this value with
Cache_hit_ratio. If the value of Cache_hit_ratio is found to be low,
there may be a problem due to improper database.
|
| Mail_transfers_failed
|
Indicates
the number of mail messages that the router was unable to transfer during the last measurement period. |
Number
|
This value should
be low or preferably zero. A high value indicates poor performance of
the server or incorrect addresses.
|
| Num_mail_waiting_local_delivery
|
Number
of mails currently waiting to be delivered to the users. |
Number
|
A relatively high
value of this measure may indicate that there is a problem in the
local network or name resolution.
|