Reference documentation and code samples for the Cloud Spanner V1 API module Google::Cloud::Spanner::V1::RequestOptions::Priority.
The relative priority for requests. Note that priority is not applicable
for BeginTransaction.
The priority acts as a hint to the Cloud Spanner scheduler and does not
guarantee priority or order of execution. For example:
Some parts of a write operation always execute at PRIORITY_HIGH,
regardless of the specified priority. This may cause you to see an
increase in high priority workload even when executing a low priority
request. This can also potentially cause a priority inversion where a
lower priority request will be fulfilled ahead of a higher priority
request.
If a transaction contains multiple operations with different priorities,
Cloud Spanner does not guarantee to process the higher priority
operations first. There may be other constraints to satisfy, such as
order of operations.
Constants
PRIORITY_UNSPECIFIED
value: 0 PRIORITY_UNSPECIFIED is equivalent to PRIORITY_HIGH.
PRIORITY_LOW
value: 1 This specifies that the request is low priority.
PRIORITY_MEDIUM
value: 2 This specifies that the request is medium priority.
PRIORITY_HIGH
value: 3 This specifies that the request is high priority.