The delay monitoring facility monitors the delay period for update data. The delay period is the difference between the time at which the source DB's transaction commits (and the update information is stored in the system log) and the time at which data linkage processing is completed. Figure 3-36 shows the concept of the delay monitoring facility. Table 3-17 lists and describes the items that are subject to delay monitoring.

Figure 3-36 Concept of the delay monitoring facility

Table 3-17 Items subject to delay monitoring

Item that is monitored	Description	Monitored process
Extraction delay period	This is the difference between the time at which update information is stored in the system log file and the time at which the update information is written into the extraction information queue file. This item is monitored when update information is written into the extraction information queue file. If there are multiple update information items in the extraction information queue I/O buffer for extraction, the extraction delay period is the difference between the time at which update information is stored in the system log file and the time at which the first committed update information is written.	Extraction process
Transmission delay period	This is the difference between the time at which update information is stored in the system log file (and the update information is sent) and the time at which its reception is completed at the target DBMS. This item is monitored for each transmission interval of the transmission process. If multiple update information items are sent in the batch mode, this is the difference between the time at which update information is stored in the system log file and the time at which reception of the first update information sent is completed.	Transmission process
Import delay period	This is the difference between the time at which update information is stored in the system log file and the time at which the update information is imported into the target database. This item is monitored for each commit interval at the target database.	Import process

Monitoring of the extraction delay period is not supported in Datareplicator Extension. For details about Datareplicator Extension's delay monitoring facility, see the manual HiRDB Datareplicator Extension Version 8.