A poll of a first database is initiated (e.g., a SOT database). The poll of the first database is to identify if any transactions have occurred since a previous poll of the first database. Based on the poll of the first database, information is received that identifies one or more transaction identifiers. A missing transaction identifier is identified based on a contagious list of transaction identifiers. In response to identifying the missing transaction identifier, the missing transaction identifier is stored in a list of missing transaction identifiers for use in a later poll of the first database. By tracking the missing transaction identifier, the process can identify transactions that take longer to commit without introducing lag for transactions that commit quickly.