# Functions
maxlen controls how many items will be stored in the queue 0 means unlimited - be careful, this can cause memory leaks.
# Constants
DeleteBatchSize is the max number of transmission records to delete in one query.
DeleteQueueMaxSize is a sanity limit to avoid unbounded memory consumption.
Mercury server error codes.
FlushDeletesFrequency controls how often we wake up to check if there are records in the delete queue, and if so, attempt to drain the queue and delete them all.
OvertimeDeleteTimeout is the maximum time we will spend trying to delete queued transmissions after exit signal before giving up and logging an error.
PruneBatchSize is the max number of transmission records to delete in one query when pruning the table.
PruneFrequency controls how often we wake up to check to see if the transmissions table has exceeded its allowed size, and if so, truncate it.