Class: Google::Cloud::Tasks::V2beta2::RateLimits

Inherits:
Object
  • Object
show all
Defined in:
lib/google/cloud/tasks/v2beta2/doc/google/cloud/tasks/v2beta2/queue.rb

Overview

Rate limits.

This message determines the maximum rate that tasks can be dispatched by a queue, regardless of whether the dispatch is a first task attempt or a retry.

Note: The debugging command, RunTask, will run a task even if the queue has reached its RateLimits.

Instance Attribute Summary collapse

Instance Attribute Details

#max_burst_size ⇒ Integer

Returns Output only. The max burst size.

Max burst size limits how fast tasks in queue are processed when many tasks are in the queue and the rate is high. This field allows the queue to have a high rate so processing starts shortly after a task is enqueued, but still limits resource usage when many tasks are enqueued in a short period of time.

The token bucket algorithm is used to control the rate of task dispatches. Each queue has a token bucket that holds tokens, up to the maximum specified by +max_burst_size+. Each time a task is dispatched, a token is removed from the bucket. Tasks will be dispatched until the queue's bucket runs out of tokens. The bucket will be continuously refilled with new tokens based on max_tasks_dispatched_per_second.

Cloud Tasks will pick the value of +max_burst_size+ based on the value of max_tasks_dispatched_per_second.

For App Engine queues that were created or updated using +queue.yaml/xml+, +max_burst_size+ is equal to bucket_size. Since +max_burst_size+ is output only, if UpdateQueue is called on a queue created by +queue.yaml/xml+, +max_burst_size+ will be reset based on the value of max_tasks_dispatched_per_second, regardless of whether max_tasks_dispatched_per_second is updated.

Returns:

  • (Integer) —

    Output only. The max burst size.

    Max burst size limits how fast tasks in queue are processed when many tasks are in the queue and the rate is high. This field allows the queue to have a high rate so processing starts shortly after a task is enqueued, but still limits resource usage when many tasks are enqueued in a short period of time.

    The token bucket algorithm is used to control the rate of task dispatches. Each queue has a token bucket that holds tokens, up to the maximum specified by +max_burst_size+. Each time a task is dispatched, a token is removed from the bucket. Tasks will be dispatched until the queue's bucket runs out of tokens. The bucket will be continuously refilled with new tokens based on max_tasks_dispatched_per_second.

    Cloud Tasks will pick the value of +max_burst_size+ based on the value of max_tasks_dispatched_per_second.

    For App Engine queues that were created or updated using +queue.yaml/xml+, +max_burst_size+ is equal to bucket_size. Since +max_burst_size+ is output only, if UpdateQueue is called on a queue created by +queue.yaml/xml+, +max_burst_size+ will be reset based on the value of max_tasks_dispatched_per_second, regardless of whether max_tasks_dispatched_per_second is updated.



219
 
# File 'lib/google/cloud/tasks/v2beta2/doc/google/cloud/tasks/v2beta2/queue.rb', line 219

class RateLimits; end

#max_concurrent_tasks ⇒ Integer

Returns The maximum number of concurrent tasks that Cloud Tasks allows to be dispatched for this queue. After this threshold has been reached, Cloud Tasks stops dispatching tasks until the number of concurrent requests decreases.

If unspecified when the queue is created, Cloud Tasks will pick the default.

The maximum allowed value is 5,000.

This field is output only for pull queues and always -1, which indicates no limit. No other queue types can have +max_concurrent_tasks+ set to -1.

This field has the same meaning as max_concurrent_requests in queue.yaml/xml.

Returns:

  • (Integer) —

    The maximum number of concurrent tasks that Cloud Tasks allows to be dispatched for this queue. After this threshold has been reached, Cloud Tasks stops dispatching tasks until the number of concurrent requests decreases.

    If unspecified when the queue is created, Cloud Tasks will pick the default.

    The maximum allowed value is 5,000.

    This field is output only for pull queues and always -1, which indicates no limit. No other queue types can have +max_concurrent_tasks+ set to -1.

    This field has the same meaning as max_concurrent_requests in queue.yaml/xml.



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# File 'lib/google/cloud/tasks/v2beta2/doc/google/cloud/tasks/v2beta2/queue.rb', line 219

class RateLimits; end

#max_tasks_dispatched_per_second ⇒ Float

Returns The maximum rate at which tasks are dispatched from this queue.

If unspecified when the queue is created, Cloud Tasks will pick the default.

  • For App Engine queues, the maximum allowed value is 500.
  • This field is output only for pull queues. In addition to the +max_tasks_dispatched_per_second+ limit, a maximum of 10 QPS of LeaseTasks requests are allowed per pull queue.

This field has the same meaning as rate in queue.yaml/xml.

Returns:

  • (Float) —

    The maximum rate at which tasks are dispatched from this queue.

    If unspecified when the queue is created, Cloud Tasks will pick the default.

    • For App Engine queues, the maximum allowed value is 500.
    • This field is output only for pull queues. In addition to the +max_tasks_dispatched_per_second+ limit, a maximum of 10 QPS of LeaseTasks requests are allowed per pull queue.

    This field has the same meaning as rate in queue.yaml/xml.



219
 
# File 'lib/google/cloud/tasks/v2beta2/doc/google/cloud/tasks/v2beta2/queue.rb', line 219

class RateLimits; end