Cisco Explorer 1540 Specifications download pdf (Page 181)

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Cisco Unified Communications Manager Managed Services Guide, Release 8.0(1)

OL-20105-01

Chapter 5 Cisco Unified Real-Time Monitoring Tool Tracing, PerfMon Counters, and Alerts

Performance Monitoring in RTMT

Database Change Notification Server

The Database Change Notification Server object provides information on different

change-notification-related statistics.

Table 5-47 contains information on the Database Change

Notification Server counters.

QueueHeadPointer This counter represents the head pointer to the change notification queue. The

head pointer acts as the starting point in the change notification queue. To

determine the number of notifications in the queue, subtract the head pointer value

from the tail pointer value. By default, this counter refreshes every 15 seconds.

QueueMax This counter represents the largest number of change notification messages that

will be processed for this client. This counter remains cumulative since the last

restart of the Cisco Database Layer Monitor service.

QueueTailPointer This counter represents the tail pointer to the change notification queue. The tail

pointer represents the ending point in the change notification queue. To determine

the number of notifications in the queue, subtract the head pointer value from the

tail pointer value. By default, this counter refreshes every 15 seconds

TablesSubscribed This counter represents the number of tables in which this client has subscribed.

Table 5-46 Database Change Notification Client (continued)

Counters Counter Descriptions

Ta b l e 5-47 Database Change Notification Server

Counter Counter Descriptions

Clients This counter represents the number of change notification clients

(services/servlets) that have subscribed for change notification.

Queue Delay This counter provides the number of seconds that the change notification process

has messages to process but is not processing them. This condition is true if:

• Either Change Notification Requests Queued in Database

(QueuedRequestsInDB) and Change Notification Requests Queued in

Memory (QueuedRequestsInMemory) are non-zero, or

• The Latest Change Notification Messages Processed count is not changing.

This condition gets checked every 15 seconds.

QueuedRequestsInDB This counter represents the number of change notification records that are in the

DBCNQueue (Database Change Notification Queue) table via direct TCP/IP

connection (not queued in shared memory). This counter refreshes every 15

seconds.

QueuedRequestsInMemory This counter represents the number of change notification requests that are

queued in shared memory.

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