SendMessageRequest

The length of time, in seconds, for which to delay a specific message. Valid values: 0 to 900. Maximum: 15 minutes. Messages with a positive DelaySeconds value become available for processing after the delay period is finished. If you don't specify a value, the default value for the queue applies.

Each message attribute consists of a Name, Type, and Value. For more information, see Amazon SQS message attributes in the Amazon SQS Developer Guide.

The message to send. The minimum size is one character. The maximum size is 1 MiB or 1,048,576 bytes

This parameter applies only to FIFO (first-in-first-out) queues.

MessageGroupId is an attribute used in Amazon SQS FIFO (First-In-First-Out) and standard queues. In FIFO queues, MessageGroupId organizes messages into distinct groups. Messages within the same message group are always processed one at a time, in strict order, ensuring that no two messages from the same group are processed simultaneously. In standard queues, using MessageGroupId enables fair queues. It is used to identify the tenant a message belongs to, helping maintain consistent message dwell time across all tenants during noisy neighbor events. Unlike FIFO queues, messages with the same MessageGroupId can be processed in parallel, maintaining the high throughput of standard queues.

The message system attribute to send. Each message system attribute consists of a Name, Type, and Value.

The URL of the Amazon SQS queue to which a message is sent.