### SQL Server Error 9052, Severity 17 "Too many tokens have been issued for this session." This error occurs when a client session exhausts its token quota due to significant activity within the SQL Server. A "token" in this context refers to an internal structure used within SQL Server's memory pool resources, such as for maintaining metadata or tracking query execution states. When too many operations are processed by a single connection or session without proper cleanup of allocated resources (such as cursors or open transactions), it can result in resource exhaustion, leading to error 9052.
The associated severity level is 17, which indicates that the issue arises from insufficient system-level resources that prevent the successful execution of user requests.
Common causes:
- Excessive use of temporary objects like temp tables.
- Failure to deallocate unused database objects (e.g., cursors).
- Inefficient queries running on high-complexity workloads within a single active session.
- Misconfigured applications holding excessive locks across long-running sessions without committing/rolling back transactions.
- Insufficient memory configuration or server resource overload caused by poor design patterns or simultaneous load pressures.
Identify the Source of Resource Exhaustion Use DMVs (Dynamic Management Views) to identify which sessions are consuming large amounts of tokens/resources. Use AI-DBA for SQL Server to optimize the resource intensive queries immediately.