- Php sleep vs wait install#
- Php sleep vs wait software#
print( "timing of Lua wait function: ", ostime_vrbl ) Step 5: Print the running time of the system. Step 4: Create a variable with the operating system time. Step 3: Creates the wait function with the time unit argument.
Php sleep vs wait software#
It does not have software then, you can use Lua Online IDEs for coding and start Lua programming.
Php sleep vs wait install#
The Lua text editor, Lua compiler, and Lua interpreter install in your computer as per the operating system and software version. Step 1: Lua programming IDE Environmental Setup.
The wait function is to stop the time to parent thread for one (1) millisecond. It means that it does not spawn unneeded processes which take up memory, live for a very short period, and then disappear. Meanwhile, the onlySpawnWhenMessageAvailable attribute first checks if there are available messages, and it spawns a new consumer process only if there are messages. The problem is that every time the cron job cron_consumers_runner runs, it spawns a new consumer process, the consumer checks if messages are available, and it terminates itself if there are no messages. When it is set to false, the consumer processes all messages and exits if there are no available messages in the queue. The consumers-wait-for-messages option works similar to onlySpawnWhenMessageAvailable. This combination of settings is recommended to save server resources such as CPU usage. That means that the consumer will run only when there is an available message in the queue, and it will be terminated when there are no more messages to process. It is also possible to combine the global queue/only_spawn_when_message_available setting in app/etc/env.php with the queue/consumers-wait-for-messages setting. The consumer will only spawn when it is needed, and it terminates itself if it is inactive for a certain period. The onlySpawnWhenMessageAvailable and maxIdleTime attributes may be combined if a specific consumer needs to run infrequently. Therefore, it is possible to overwrite the global only_spawn_when_message_available value by setting onlySpawnWhenMessageAvailable equal to 0 or 1 for each consumer in queue_consumer.xml. The onlySpawnWhenMessageAvailable consumer attribute has higher priority than the global queue/only_spawn_when_message_available setting in app/etc/env.php. By default, the global value of only_spawn_when_message_available for all consumers is 1. It is possible to set onlySpawnWhenMessageAvailable globally by setting queue/only_spawn_when_message_available equal to 0 or 1 in app/etc/env.php. The onlySpawnWhenMessageAvailable attribute is only checked and validated by the \Magento\MessageQueue\Model\Cron\ConsumersRunner class that runs consumer processes with cron. The maxIdleTime and sleep attributes will be handled only by consumers that were fired with a defined maxMessages parameter. Default value is null which equals to 1 second.īoolean value ( 1 or 0 only) that identifies whether a consumer should be spawned only if there is available message in the related queue. Specifies time in seconds to sleep before checking if a new message is available in the queue. If no message was handled within this period of time, the consumer exits. Specifies the maximum number of messages to consume.ĭefines the maximum waiting time in seconds for a new message from the queue. Otherwise, the connection name must be db. 
If you still want to specify connection type for consumer, keep in mind that for AMQP connections, the connection name must match the connection attribute in the queue_topology.xml file. If AMQP is configured in deployment configuration, AMQP connection is used. Default value: Magento\Framework\MessageQueue\Consumer.Ĭonnection is defined dynamically based on deployment configuration of message queue in env.php. The class name that consumes the message. The value must be specified in the format \Module\. Specifies the class and method that processes the message. Defines the queue name to send the message to.
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