VMware PACKAGE MANAGER 1.1 Manual de usuario descargar pdf (Pagina 46)

Performance tuning

exchange.default.compression = Value

where possible values are:

• deflate - Use DEFLATE algorithm

• none - Do not compress messages

By default, all messages published to all exchanges are compressed.

5.7.3. Message TTL

You can configure the time-to-live value (TTL) of messages published to a queue, setting them to expire if they have

not been delivered to a client within a given time.

To change default message TTL, edit the following line:

queue.default.x-message-ttl = Value

where Value is a value in milliseconds. By default, messages expire after one day (86400000 milliseconds).

Examples

To cause unprocessed events to expire if they have not been processed within one hour (for example, if zeneventd

backs up in an event storm), uncomment the line:

# queue.$RawZenEvents.x-message-ttl = 3600000

To cause processed events to expire if they have not been persisted within one hour (for example, if zeneventd backs

up in an event storm), uncomment the line:

queue.$ZepZenEvents.x-message-ttl = 3600000

5.7.4. Queue expiration

You can configure unused queues to be deleted automatically after a period of time. "Unused" means that the queue

has no consumers, and has not been re-declared.

To change default queue expiration, edit the following line:

queue.default.x-expires = Value

where Value is a value in milliseconds. By default, queues expire after one day (86400000 seconds).

5.8. Configuring the heartbeat monitor

The heartbeat monitor allows daemons that have connections to RabbitMQ to set up heartbeats with the message

broker, and is part of Zenoss Service Dynamics Global Operations Management. Configuration options allow you to

specify how often the message broker should expect to receive heartbeats from the consumers created by the daemon.

If three intervals pass without the message broker receiving a heartbeat, the broker will disconnect the consumer.

You may want to configure the interval if you are fine-tuning a high availability environment and encountering issues

with consumers not disconnecting quickly enough from RabbitMQ when a failover scenario occurs.

By default, a heartbeat is sent every 60 seconds. You can modify this default in two ways:

• Modify the value of the amqpheartbeat setting (by default, 60), in the $ZENHOME/etc/zengomd.conf file.

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VMware PACKAGE MANAGER 1.1 Manual de usuario Pagina 46