deadlock_timeout: The deadlock_timeout parameter in PostgreSQL specifies the amount of time the system will wait before checking for deadlocks when a query is waiting to acquire a lock. The default value is typically set to 1 second. This parameter is crucial for preventing transactions from being stuck indefinitely due to deadlocks, which occur when two or more transactions hold locks that the others need, blocking each other permanently. A well-tuned deadlock_timeout can help maintain smooth operation by resolving deadlocks promptly, but setting it too low might cause unnecessary overhead due to frequent deadlock checks.deadlock_timeout might be beneficial. Increasing the timeout can reduce the overhead of deadlock detection in systems where deadlocks are infrequent and transactions typically complete quickly. Conversely, in highly concurrent systems where deadlocks are a concern, a slightly lower timeout might help detect and resolve deadlocks faster, improving overall throughput.deadlock_timeout in small increments, either up or down, based on your monitoring results. It's essential to balance the trade-off between the cost of frequent deadlock checks and the need to resolve deadlocks quickly.deadlock_timeout setting is about finding a balance that minimizes the impact of deadlocks on your application while avoiding excessive performance overhead from too frequent deadlock checks. The optimal setting can vary significantly based on application design, the typical length of transactions, and the level of concurrency. Regularly reviewing deadlock logs and performance metrics will guide adjustments to this parameter. Remember, while tuning deadlock_timeout can help mitigate the impact of deadlocks, addressing the root cause through application design, such as minimizing transaction lengths and avoiding known patterns that lead to deadlocks, is equally important.