IMAP4 (PI_IMP4)

Function

The IMAP4 (PI_IMP4) record stores information about IMAP4 service response time. This is a multi-instance record.

Default and changeable values

ItemDefault valueChangeable
Collection Interval360Y
Collection Offset0Y
LogNoY
LOGIF(Blank)Y

ODBC key fields

PI_IMP4_MSR_COND_ID

Lifetime

None

Record size

Fields

View name
(Manager name)
DescriptionSummary ruleFormatDeltaData source
Data Transfer Time
(DATA_TRANS_TIME)
Data transfer time (seconds) ((7) in Figure 9-6)AVGdoubleNoProbe Daemon
Deletion Time
(DELETION_TIME)
Deletion time (seconds) ((8) in Figure 9-6)AVGdoubleNoProbe Daemon
DNS Time
(DNS_TIME)
DNS time (seconds) ((4) in Figure 9-6)AVGdoubleNoProbe Daemon
Download Count
(DOWNLOAD_COUNT)
Number of acquired emailsAVGdoubleNoProbe Daemon
IMAP Time
(IMAP4_TIME)
IMAP4 time (seconds) ((3) in Figure 9-6)AVGdoubleNoProbe Daemon
Preprocessing Time
(PRE_PROCESS_TIME)
Preprocessing time (seconds) ((6) in Figure 9-6)AVGdoubleNoProbe Daemon
Setup Time
(SETUP_TIME)
Setup time (seconds) ((2) in Figure 9-6)AVGdoubleNoProbe Daemon
TCP Connection Time
(TCP_CON_TIME)
TCP connection time (seconds) ((5) in Figure 9-6)AVGdoubleNoProbe Daemon
Throughput
(THROUGHPUT)
Throughput for email acquisition (bits/second). This is determined by the total size of emails and the data transfer time.AVGdoubleNoProbe Daemon
Total Amount of Data
(TOTAL_DATA_SIZE)
Total amount of data transferred between the IMAP4 probe and the measurement-target server via the TCP connection (bytes)AVGdoubleNoProbe Daemon
Total Response Time
(TOTAL_RESP_TIME)
Total response time (seconds) ((1) in Figure 9-6)AVGdoubleNoProbe Daemon
Total Size of Email
(TOTAL_EMAIL_SIZE)
Total size of acquired email (bytes)AVGdoubleNoProbe Daemon

The following figure shows the IMAP4 sequence.

Figure 9-6 IMAP4 sequence

[Figure]

IMAP4 operating environment and notes

An IMAP4 probe measures the time required for completing reception of emails addressed to a specified user.

The following describes and provides notes on an IMAP4 operating environment.

Email size

The total size of an email for the IMAP4 probe is the received header plus the message text. There is no limitation to the size of an email that can be acquired.

Deleting emails

The IMAP4 probe acquires the newly arrived emails in an inbox. Executing deletion deletes all the emails in that inbox. This means that at the next measurement, the number of emails to be measured would be zero. Therefore, send emails for measurement again before the next measurement occurs.

Deletion method

The two email deletion methods for IMAP4 are logical deletion and physical deletion. An IMAP4 probe uses the physical email deletion method, so that emails are not accumulated when the IMAP4 probe receives emails that are sent periodically by a program such as a SMTP probe.

RFC compliance

For the functions that are not compliance with RFCs and the restrictions, see the above notes.